Files
accounted/lib/tax/deadline-config.ts
T
Mattsson e11f70b347 Bug/gh issues fiz (#1103)
* refactor: optimize page loading and data fetching

* fix: resolve recurring production runtime errors

* feat: add MCP company and customer updates

* fix: handle year-end tax adjustments

* feat: harden annual report compliance

* fix: expand invoice logo and font support

* fix: sanitize API route error responses

* fix: sanitize user-facing error messages

* feat: persist onboarding and tax assessment notices

* fix: reduce cloud backup audit churn

* feat: refine invoice editor layout

* fix: show saved tax adjustments in INK2

* fix: complete annual report API mappings

* docs: record operational safeguards and decisions

* fix: harden annual report review findings

* fix: adjust column span for description based on VAT registration

* New css class name
2026-07-21 23:00:15 +02:00

822 lines
32 KiB
TypeScript

/**
* Static configuration of all Swedish tax deadlines (Skatteverket)
* Based on Skatteverket's official deadline schedule
*/
import type { TaxDeadlineType, EntityType, MomsPeriod, TaxFilingMethod } from '@/types'
import { isBankingDay } from './swedish-holidays'
// Condition function type for determining if a deadline applies
export type DeadlineCondition = (settings: CompanySettingsForDeadlines) => boolean
export interface TaxAssessmentNoticeForDeadline {
id: string
fiscalPeriodName: string
decisionType: 'final' | 'reassessment'
paymentDueDate: string
}
// Subset of company settings needed for deadline generation
export interface CompanySettingsForDeadlines {
entity_type: EntityType
moms_period: MomsPeriod | null
f_skatt: boolean
preliminary_tax_monthly: number | null
vat_registered: boolean
pays_salaries: boolean
// null = never attested; the generator falls back to pays_salaries so
// rows saved before the registration flag existed keep their deadlines.
employer_registered: boolean | null
employer_seasonal: boolean
fiscal_year_start_month: number // 1-12
vat_taxable_base_over_40m: boolean
vat_has_eu_trade: boolean
vat_filing_method: TaxFilingMethod
periodisk_sammanstallning_enabled: boolean
periodisk_sammanstallning_period: 'monthly' | 'quarterly'
periodisk_sammanstallning_filing_method: TaxFilingMethod
kontrolluppgifter_enabled: boolean
rot_rut_enabled: boolean
oss_enabled: boolean
ioss_enabled: boolean
intrastat_enabled: boolean
punktskatt_enabled: boolean
fyllnadsinbetalning_enabled: boolean
/**
* Derived, NOT a company_settings column: distinct years with paid ROT/RUT
* invoices. Populated by the generator from the invoices table (a begäran
* deadline for year Y only exists when Y actually has ROT/RUT payments,
* Lag 2009:194 8 §). Undefined in pure-settings contexts (backfill
* detection), where rot_rut_begaran rows are simply never expected.
*/
rot_rut_payment_years?: number[]
/** Derived from active tax_assessment_notices rows by the generator. */
tax_assessment_notices?: TaxAssessmentNoticeForDeadline[]
}
// Configuration for a single tax deadline type
export interface TaxDeadlineConfig {
type: TaxDeadlineType
titleTemplate: string
description: string
condition: DeadlineCondition
priority: 'critical' | 'important' | 'normal'
// Function to generate all instances for a year
generateDates: (year: number, settings: CompanySettingsForDeadlines) => DeadlineInstance[]
// Link to report type for navigation
linkedReportType: string | null
/**
* EU-law deadlines (OSS/IOSS) do not move to the next banking day: the
* last day of the month stands even on weekends and holidays. Also set
* for dates that are already computed as banking days (Intrastat).
*/
skipBankingDayAdjustment?: boolean
}
// A specific instance of a deadline
export interface DeadlineInstance {
day: number // Day of month
month: number // 0-indexed month
year: number
period: string // e.g., "2025-Q1", "2025-01", "2025"
periodLabel: string // Human-readable, e.g., "Q1 2025", "januari 2025"
taxAssessmentNoticeId?: string
}
/**
* Day-of-month of the nth Swedish banking day in a month (1-based n).
* Used for Intrastat, whose SCB reporting dates follow the ~10th working
* day of the month after the reference month.
*/
function nthBankingDayOfMonth(year: number, month: number, n: number): number {
let count = 0
for (let day = 1; day <= 31; day++) {
const date = new Date(year, month, day)
if (date.getMonth() !== month) break
if (isBankingDay(date)) {
count++
if (count === n) return day
}
}
// A month always has more than 10 banking days; never reached.
return 28
}
function getFiscalYearLabel(fiscalYearEndMonth: number, fiscalYearEndYear: number): string {
return fiscalYearEndMonth === 12
? `${fiscalYearEndYear}`
: `${fiscalYearEndYear - 1}/${fiscalYearEndYear}`
}
function getAnnualVatDeadline(
fiscalYearEndMonth: number,
fiscalYearEndYear: number,
settings: CompanySettingsForDeadlines,
): { day: number; month: number; year: number } {
// Enskild firma (calendar year only, BFL 3 kap.): without EU trade the
// annual momsdeklaration follows the income tax return (12 May); with EU
// trade it is due 26 February (26 kap. 33-33a §§ SFL, Skatteverket's
// published helårsmoms schedule).
if (settings.entity_type === 'enskild_firma') {
return settings.vat_has_eu_trade
? { day: 26, month: 1, year: fiscalYearEndYear + 1 }
: { day: 12, month: 4, year: fiscalYearEndYear + 1 }
}
if (settings.vat_has_eu_trade) {
const month = (fiscalYearEndMonth + 1) % 12
const year = fiscalYearEndYear + (fiscalYearEndMonth >= 11 ? 1 : 0)
// A 26 December due date lands on annandag jul; the banking-day
// adjustment moves it to Skatteverket's published 27th (or later).
return { day: 26, month, year }
}
const paper = settings.vat_filing_method === 'paper'
if (fiscalYearEndMonth <= 4) {
return { day: 12, month: paper ? 10 : 11, year: fiscalYearEndYear }
}
if (fiscalYearEndMonth <= 6) {
return paper
? { day: 27, month: 11, year: fiscalYearEndYear }
: { day: 17, month: 0, year: fiscalYearEndYear + 1 }
}
if (fiscalYearEndMonth <= 8) {
return { day: 12, month: paper ? 2 : 3, year: fiscalYearEndYear + 1 }
}
return { day: paper ? 12 : 17, month: paper ? 6 : 7, year: fiscalYearEndYear + 1 }
}
function generateAnnualVatDates(
deadlineYear: number,
settings: CompanySettingsForDeadlines,
): DeadlineInstance[] {
const fiscalYearEndMonth = settings.entity_type === 'enskild_firma'
? 12
: (settings.fiscal_year_start_month === 1 ? 12 : settings.fiscal_year_start_month - 1)
const results: DeadlineInstance[] = []
for (const fiscalYearEndYear of [deadlineYear - 1, deadlineYear]) {
const deadline = getAnnualVatDeadline(fiscalYearEndMonth, fiscalYearEndYear, settings)
if (deadline.year !== deadlineYear) continue
const period = getFiscalYearLabel(fiscalYearEndMonth, fiscalYearEndYear)
results.push({
...deadline,
period,
periodLabel: period,
})
}
return results
}
/**
* All tax deadline configurations
*/
export const TAX_DEADLINE_CONFIGS: TaxDeadlineConfig[] = [
// Momsdeklaration (monthly)
{
type: 'moms_monthly',
titleTemplate: 'Momsdeklaration {periodLabel}',
description: 'Momsdeklaration för månadsredovisare',
condition: (s) => s.vat_registered && s.moms_period === 'monthly',
priority: 'important',
linkedReportType: 'vat',
generateDates: (year, settings) => {
const instances: DeadlineInstance[] = []
for (let month = 0; month < 12; month++) {
const monthOffset = settings.vat_taxable_base_over_40m ? 1 : 2
const deadlineMonth = (month + monthOffset) % 12
const deadlineYear = year + Math.floor((month + monthOffset) / 12)
// Above SEK 40M the 26th applies year-round; 26 December is annandag
// jul, and the banking-day adjustment yields Skatteverket's 27th.
const day = settings.vat_taxable_base_over_40m
? 26
: (deadlineMonth === 0 || deadlineMonth === 7 ? 17 : 12)
instances.push({
day,
month: deadlineMonth,
year: deadlineYear,
period: `${year}-${String(month + 1).padStart(2, '0')}`,
periodLabel: getMonthLabel(month, year),
})
}
return instances
},
},
// Momsdeklaration (quarterly)
{
type: 'moms_quarterly',
titleTemplate: 'Momsdeklaration {periodLabel}',
description: 'Momsdeklaration för kvartalsredovisare',
condition: (s) => s.vat_registered && s.moms_period === 'quarterly',
priority: 'important',
linkedReportType: 'vat',
generateDates: (year) => {
return [
{ day: 12, month: 4, year, period: `${year}-Q1`, periodLabel: `Q1 ${year}` },
{ day: 17, month: 7, year, period: `${year}-Q2`, periodLabel: `Q2 ${year}` },
{ day: 12, month: 10, year, period: `${year}-Q3`, periodLabel: `Q3 ${year}` },
{ day: 12, month: 1, year: year + 1, period: `${year}-Q4`, periodLabel: `Q4 ${year}` },
]
},
},
// Momsdeklaration (yearly)
{
type: 'moms_yearly',
titleTemplate: 'Momsdeklaration {periodLabel}',
description: 'Momsdeklaration för årsredovisare',
condition: (s) => s.vat_registered && s.moms_period === 'yearly',
priority: 'important',
linkedReportType: 'vat',
generateDates: (year, settings) => generateAnnualVatDates(year, settings),
},
// Debiterad preliminärskatt (monthly payment). Gated on the debited amount,
// NOT on F-skatt approval: approval is a status with no recurring duty, and
// Skatteverket debits nothing below 2 400 kr/år (SFL 55 kap. 2 §). The
// monthly payment obligation exists only while an amount > 0 is debited
// (SFL 62 kap. 4-5 §§).
{
type: 'f_skatt',
titleTemplate: 'Betala preliminärskatt {periodLabel}',
description: 'Inbetalning av debiterad preliminärskatt',
condition: (s) => (s.preliminary_tax_monthly ?? 0) > 0,
priority: 'important',
linkedReportType: null,
generateDates: (year, settings) => {
// Small-company förfallodagar are the 12th, with the 17th in January
// and August; storföretag (VAT taxable base over SEK 40M) keep the
// 12th in August, January-only 17th (62 kap. 3-4 §§ SFL and
// Skatteverket's published storföretag calendar).
const storforetag = settings.vat_registered && settings.vat_taxable_base_over_40m
const instances: DeadlineInstance[] = []
for (let month = 0; month < 12; month++) {
instances.push({
day: month === 0 || (month === 7 && !storforetag) ? 17 : 12,
month,
year,
period: `${year}-${String(month + 1).padStart(2, '0')}`,
periodLabel: getMonthLabel(month, year),
})
}
return instances
},
},
// Arbetsgivardeklaration (monthly). A REGISTERED employer must file AGI
// every month, including nil months (SFL 26 kap. 3 §): the gate is
// registration, not whether salaries were paid, with pays_salaries as a
// fallback for settings saved before the registration flag existed.
// Säsongsregistrerade employers file only for months with payments plus a
// December nil declaration when nothing was paid all year, so they get
// only the December-period row; payment months are handled by the salary
// flow itself.
// The filing day is keyed to the VAT taxable base, not a separate employer
// measure (SFL 26 kap.): above SEK 40M the whole skattedeklaration (AGI and
// VAT) is due the 26th of the following month; otherwise the 12th (17th in
// January and August). Employers without VAT reporting follow the same
// 12th/17th small-company schedule.
{
type: 'arbetsgivardeklaration',
titleTemplate: 'Arbetsgivardeklaration {periodLabel}',
description: 'Arbetsgivardeklaration för registrerade arbetsgivare',
condition: (s) => s.employer_registered ?? s.pays_salaries,
priority: 'important',
linkedReportType: null,
generateDates: (year, settings) => {
const storforetag = settings.vat_registered && settings.vat_taxable_base_over_40m
const instances: DeadlineInstance[] = []
for (let month = 0; month < 12; month++) {
if (settings.employer_seasonal && month !== 11) continue
const deadlineMonth = (month + 1) % 12
const deadlineYear = month === 11 ? year + 1 : year
const day = storforetag
? 26
: (deadlineMonth === 0 || deadlineMonth === 7 ? 17 : 12)
instances.push({
day,
month: deadlineMonth,
year: deadlineYear,
period: `${year}-${String(month + 1).padStart(2, '0')}`,
periodLabel: getMonthLabel(month, year),
})
}
return instances
},
},
// Skatteinbetalning (storföretag): companies above the SEK 40M VAT taxable
// base file the skattedeklaration on the 26th but must still have deducted
// tax and employer contributions paid into skattekontot by the 12th (17th
// in January). Without this row the 26th filing date hides a payment
// deadline two weeks earlier.
{
type: 'skatteinbetalning',
titleTemplate: 'Betala skatt och arbetsgivaravgifter {periodLabel}',
description: 'Inbetalning av avdragen skatt och arbetsgivaravgifter för företag med beskattningsunderlag över 40 miljoner kronor',
condition: (s) =>
(s.employer_registered ?? s.pays_salaries) && s.vat_registered && s.vat_taxable_base_over_40m,
priority: 'important',
linkedReportType: null,
generateDates: (year) => {
const instances: DeadlineInstance[] = []
for (let month = 0; month < 12; month++) {
const deadlineMonth = (month + 1) % 12
const deadlineYear = month === 11 ? year + 1 : year
instances.push({
// Deliberately January-only: the 17 August exception applies to the
// small-company (below SEK 40M) schedule. Storföretag payment dates
// are the 12th every month except January (62 kap. 3 § SFL and
// Skatteverket's published storföretag calendar).
day: deadlineMonth === 0 ? 17 : 12,
month: deadlineMonth,
year: deadlineYear,
period: `${year}-${String(month + 1).padStart(2, '0')}`,
periodLabel: getMonthLabel(month, year),
})
}
return instances
},
},
// Periodisk sammanställning (EU sales)
{
type: 'periodisk_sammanstallning',
titleTemplate: 'Periodisk sammanställning {periodLabel}',
description: 'Periodisk sammanställning för EU-försäljning',
condition: (s) => s.vat_registered && s.periodisk_sammanstallning_enabled,
priority: 'normal',
linkedReportType: null,
generateDates: (year, settings) => {
const day = settings.periodisk_sammanstallning_filing_method === 'paper' ? 20 : 25
if (settings.periodisk_sammanstallning_period === 'quarterly') {
return [
{ day, month: 3, year, period: `${year}-Q1`, periodLabel: `Q1 ${year}` },
{ day, month: 6, year, period: `${year}-Q2`, periodLabel: `Q2 ${year}` },
{ day, month: 9, year, period: `${year}-Q3`, periodLabel: `Q3 ${year}` },
{ day, month: 0, year: year + 1, period: `${year}-Q4`, periodLabel: `Q4 ${year}` },
]
}
return Array.from({ length: 12 }, (_, month) => ({
day,
month: (month + 1) % 12,
year: month === 11 ? year + 1 : year,
period: `${year}-${String(month + 1).padStart(2, '0')}`,
periodLabel: getMonthLabel(month, year),
}))
},
},
// OSS (unionsordningen): quarterly declaration for B2C distance sales
// above the EUR 10 000 threshold, filed in Skatteverket's OSS portal
// (ML 22 kap., Art. 369f VAT directive). Due the last day of the month
// after the quarter. EU-law deadline: it does NOT move to the next
// banking day; a Sunday 31st stands.
{
type: 'oss_quarterly',
titleTemplate: 'OSS-deklaration {periodLabel}',
description: 'OSS-deklaration (unionsordningen) för EU-försäljning till konsumenter',
condition: (s) => s.vat_registered && s.oss_enabled,
priority: 'important',
linkedReportType: null,
skipBankingDayAdjustment: true,
generateDates: (year) => [
{ day: 30, month: 3, year, period: `${year}-Q1`, periodLabel: `Q1 ${year}` },
{ day: 31, month: 6, year, period: `${year}-Q2`, periodLabel: `Q2 ${year}` },
{ day: 31, month: 9, year, period: `${year}-Q3`, periodLabel: `Q3 ${year}` },
{ day: 31, month: 0, year: year + 1, period: `${year}-Q4`, periodLabel: `Q4 ${year}` },
],
},
// IOSS (importordningen): monthly declaration for distance sales of
// imported low-value goods (Art. 369s VAT directive). Due the last day
// of the following month; same EU no-shift rule as OSS. Unlike OSS the
// scheme does not require Swedish VAT registration (Art. 369s applies to
// registered IOSS sellers regardless), so the opt-in flag stands alone.
{
type: 'ioss_monthly',
titleTemplate: 'IOSS-deklaration {periodLabel}',
description: 'IOSS-deklaration (importordningen) för distansförsäljning av importerade varor',
condition: (s) => s.ioss_enabled,
priority: 'important',
linkedReportType: null,
skipBankingDayAdjustment: true,
generateDates: (year) =>
Array.from({ length: 12 }, (_, month) => {
const deadlineYear = month === 11 ? year + 1 : year
const deadlineMonth = (month + 1) % 12
// Last day of the month after the reference month.
const day = new Date(deadlineYear, deadlineMonth + 1, 0).getDate()
return {
day,
month: deadlineMonth,
year: deadlineYear,
period: `${year}-${String(month + 1).padStart(2, '0')}`,
periodLabel: getMonthLabel(month, year),
}
}),
},
// Intrastat: SCB's monthly trade-in-goods report for companies above the
// arrival/dispatch thresholds. SCB publishes exact dates yearly; they
// follow the ~10th working day of the month after the reference month,
// which is what we compute. Already a banking day, so no adjustment.
{
type: 'intrastat_monthly',
titleTemplate: 'Intrastat {periodLabel}',
description: 'Intrastat-rapport till SCB för varuhandel inom EU',
condition: (s) => s.vat_registered && s.intrastat_enabled,
priority: 'normal',
linkedReportType: null,
skipBankingDayAdjustment: true,
generateDates: (year) =>
Array.from({ length: 12 }, (_, month) => {
const deadlineYear = month === 11 ? year + 1 : year
const deadlineMonth = (month + 1) % 12
return {
day: nthBankingDayOfMonth(deadlineYear, deadlineMonth, 10),
month: deadlineMonth,
year: deadlineYear,
period: `${year}-${String(month + 1).padStart(2, '0')}`,
periodLabel: getMonthLabel(month, year),
}
}),
},
// Punktskattedeklaration (monthly): excise duties follow the ordinary
// skattedeklaration schedule (SFL 26 kap.): the 12th of the following
// month (17th in January and August), the 26th for storföretag.
{
type: 'punktskatt_monthly',
titleTemplate: 'Punktskattedeklaration {periodLabel}',
description: 'Punktskattedeklaration för punktskattepliktiga företag',
condition: (s) => s.punktskatt_enabled,
priority: 'important',
linkedReportType: null,
generateDates: (year, settings) => {
const storforetag = settings.vat_registered && settings.vat_taxable_base_over_40m
const instances: DeadlineInstance[] = []
for (let month = 0; month < 12; month++) {
const deadlineMonth = (month + 1) % 12
const deadlineYear = month === 11 ? year + 1 : year
const day = storforetag
? 26
: (deadlineMonth === 0 || deadlineMonth === 7 ? 17 : 12)
instances.push({
day,
month: deadlineMonth,
year: deadlineYear,
period: `${year}-${String(month + 1).padStart(2, '0')}`,
periodLabel: getMonthLabel(month, year),
})
}
return instances
},
},
// Fyllnadsinbetalning: extra preliminary tax payments that stop
// kostnadsränta on the coming kvarskatt (SFL 62 kap. 8 §, 65 kap.).
// Parts over 30 000 kr must be on skattekontot by the 12th of the second
// month after the beskattningsår ends (12 Feb for calendar years); the
// remainder by the 3rd of the fifth month (3 May). Both dates are
// generated since the app cannot know the kvarskatt amount; the labels
// say which part each date covers.
{
type: 'fyllnadsinbetalning',
titleTemplate: 'Fyllnadsinbetalning {periodLabel}',
description: 'Extra inbetalning av preliminärskatt för att undvika kostnadsränta',
condition: (s) => s.fyllnadsinbetalning_enabled,
priority: 'normal',
linkedReportType: null,
generateDates: (year, settings) => {
const fyEndMonth = settings.entity_type === 'enskild_firma'
? 12
: (settings.fiscal_year_start_month === 1 ? 12 : settings.fiscal_year_start_month - 1)
const results: DeadlineInstance[] = []
for (const fyEndYear of [year - 1, year]) {
const fyLabel = getFiscalYearLabel(fyEndMonth, fyEndYear)
// fyEndMonth is 1-indexed; (fyEndMonth - 1 + n) is the 0-indexed
// month n months after FY end, counted from fyEndYear's January.
// 12th of the second month after FY end (amounts over 30 000 kr):
// February for a calendar fiscal year.
const over = {
day: 12,
month: (fyEndMonth + 1) % 12,
year: fyEndYear + Math.floor((fyEndMonth + 1) / 12),
}
if (over.year === year) {
results.push({
...over,
period: `${fyLabel}-over30k`,
periodLabel: `belopp över 30 000 kr, beskattningsår ${fyLabel}`,
})
}
// 3rd of the fifth month after FY end (the remainder): May for a
// calendar fiscal year.
const rest = {
day: 3,
month: (fyEndMonth + 4) % 12,
year: fyEndYear + Math.floor((fyEndMonth + 4) / 12),
}
if (rest.year === year) {
results.push({
...rest,
period: `${fyLabel}-rest`,
periodLabel: `resterande belopp, beskattningsår ${fyLabel}`,
})
}
}
return results
},
},
// Kvarskatt: the payment date is copied exactly from the final tax notice
// or reassessment decision. It must not be estimated or moved to a banking
// day because Skatteverket has already determined the statutory due date.
{
type: 'kvarskatt',
titleTemplate: 'Kvarskatt {periodLabel}',
description: 'Kvarskatt enligt slutskattebesked eller omprövningsbeslut',
condition: (s) => (s.tax_assessment_notices?.length ?? 0) > 0,
priority: 'critical',
linkedReportType: null,
skipBankingDayAdjustment: true,
generateDates: (year, settings) => (settings.tax_assessment_notices ?? [])
.filter((notice) => Number(notice.paymentDueDate.slice(0, 4)) === year)
.map((notice) => ({
day: Number(notice.paymentDueDate.slice(8, 10)),
month: Number(notice.paymentDueDate.slice(5, 7)) - 1,
year,
period: `notice:${notice.id}`,
periodLabel: notice.decisionType === 'reassessment'
? `omprövning, ${notice.fiscalPeriodName}`
: `slutskattebesked, ${notice.fiscalPeriodName}`,
taxAssessmentNoticeId: notice.id,
})),
},
// Kontrolluppgifter (KU10/KU20/KU31): annual income statements to
// Skatteverket, due 31 January after the income year (SFL 24 kap. 1 §).
// KU31 (utdelning) is never covered by the monthly AGI, so a fåmansbolag
// paying utdelning must file it separately even when all salaries are
// AGI-reported. Opt-in: the user confirms the flag in tax settings, where
// a ledger-derived signal (2898 utdelning, 2393/2893 ägarlån) suggests it.
{
type: 'kontrolluppgifter',
titleTemplate: 'Kontrolluppgifter {periodLabel}',
description: 'Kontrolluppgifter (KU10/KU20/KU31) till Skatteverket',
condition: (s) => s.kontrolluppgifter_enabled,
priority: 'important',
linkedReportType: null,
generateDates: (year) => {
// Due 31 January for the previous income year (always calendar year:
// kontrolluppgifter follow the income year, not the räkenskapsår).
return [
{ day: 31, month: 0, year, period: `${year - 1}`, periodLabel: `${year - 1}` },
]
},
},
// ROT/RUT begäran om utbetalning: the payout request for deductions given
// during year Y must reach Skatteverket by 31 January of year Y+1
// (Lag 2009:194 8 §). Missing the date forfeits the payout on account
// 1513, so this is the one deadline where lateness costs the principal,
// not a fee. Keyed on PAYMENT years (buyer paid), never invoice dates:
// rows only exist for years present in rot_rut_payment_years.
{
type: 'rot_rut_begaran',
titleTemplate: 'ROT/RUT-begäran om utbetalning {periodLabel}',
description: 'Begäran om utbetalning för ROT/RUT-avdrag till Skatteverket',
condition: (s) => s.rot_rut_enabled,
priority: 'critical',
linkedReportType: null,
generateDates: (year, settings) => {
if (!(settings.rot_rut_payment_years ?? []).includes(year - 1)) {
return []
}
return [
{ day: 31, month: 0, year, period: `${year - 1}`, periodLabel: `${year - 1}` },
]
},
},
// Inkomstdeklaration (EF) - 2 maj
{
type: 'inkomstdeklaration_ef',
titleTemplate: 'Inkomstdeklaration + NE-bilaga {periodLabel}',
description: 'Inkomstdeklaration för enskild firma',
condition: (s) => s.entity_type === 'enskild_firma',
priority: 'critical',
linkedReportType: 'ne-declaration',
generateDates: (year) => {
// Due May 2nd for previous year's income
return [
{ day: 2, month: 4, year, period: `${year - 1}`, periodLabel: `${year - 1}` },
]
},
},
// Inkomstdeklaration (AB): digital filing deadlines per Skatteverket lookup table
{
type: 'inkomstdeklaration_ab',
titleTemplate: 'Inkomstdeklaration AB {periodLabel}',
description: 'Inkomstdeklaration för aktiebolag',
condition: (s) => s.entity_type === 'aktiebolag',
priority: 'critical',
linkedReportType: null,
generateDates: (year, settings) => {
// FY end month (1-indexed): e.g. start=1 → end=12, start=5 → end=4
const fyEndMonth = settings.fiscal_year_start_month === 1 ? 12 : settings.fiscal_year_start_month - 1
// Skatteverket digital filing deadline lookup:
// FY end Jan-Apr → Dec 1 same year as FY end
// FY end May-Jun → Jan 15 year after FY end
// FY end Jul-Aug → Apr 1 year after FY end
// FY end Sep-Dec → Aug 1 year after FY end
const getDeadline = (fyEndYear: number) => {
if (fyEndMonth >= 1 && fyEndMonth <= 4) {
return { day: 1, month: 11, year: fyEndYear } // Dec 1
} else if (fyEndMonth >= 5 && fyEndMonth <= 6) {
return { day: 15, month: 0, year: fyEndYear + 1 } // Jan 15
} else if (fyEndMonth >= 7 && fyEndMonth <= 8) {
return { day: 1, month: 3, year: fyEndYear + 1 } // Apr 1
} else {
return { day: 1, month: 7, year: fyEndYear + 1 } // Aug 1
}
}
// We need to find which FY ending produces a deadline in `year`.
// Try FY endings in year-1 and year (both could produce deadlines in `year`).
const results: DeadlineInstance[] = []
for (const fyEndYear of [year - 1, year]) {
const dl = getDeadline(fyEndYear)
if (dl.year === year) {
// Compute the FY start year
const fyStart = fyEndMonth === 12 ? fyEndYear : fyEndYear
const periodLabel = fyEndMonth === 12
? `${fyEndYear}`
: `${fyStart - 1}/${fyStart}`
const period = fyEndMonth === 12
? `${fyEndYear}`
: `${fyStart - 1}/${fyStart}`
results.push({
day: dl.day,
month: dl.month,
year: dl.year,
period,
periodLabel,
})
}
}
return results
},
},
// Årsredovisning (AB): 7 months after fiscal year end per ÅRL 8:3
{
type: 'arsredovisning',
titleTemplate: 'Årsredovisning till Bolagsverket {periodLabel}',
description: 'Årsredovisning för aktiebolag',
condition: (s) => s.entity_type === 'aktiebolag',
priority: 'critical',
linkedReportType: null,
generateDates: (year, settings) => {
// FY end month (1-indexed)
const fyEndMonth = settings.fiscal_year_start_month === 1 ? 12 : settings.fiscal_year_start_month - 1
// 7 months after FY end per ÅRL 8:3
// Deadline month (0-indexed): ((fyEndMonth - 1) + 7) % 12
// Last day of the deadline month
// Determine which year the deadline falls in
const _wrapsYear = fyEndMonth > 5 // Jun+ wraps into next year
// For calendar year (Dec end): deadline Jul 31 same year+1
// The FY ending in `year` produces a deadline:
const _fyEndYear = year - 1 // By default we show deadline for the FY that ended in year-1
// Simpler: compute from a concrete FY end date
// FY ends: fyEndMonth (1-indexed), last day, in some year.
// We want the deadline that falls in `year`.
// Try FY endings in year-1 and year
const results: DeadlineInstance[] = []
for (const endYr of [year - 1, year]) {
// Deadline: 7 months after last day of fyEndMonth in endYr
const dlMonth0 = ((fyEndMonth - 1) + 7) % 12
const dlYear = (fyEndMonth - 1) + 7 >= 12 ? endYr + 1 : endYr
if (dlYear === year) {
const lastDay = new Date(dlYear, dlMonth0 + 1, 0).getDate()
const periodLabel = fyEndMonth === 12
? `${endYr}`
: `${endYr - 1}/${endYr}`
const period = periodLabel
results.push({
day: lastDay,
month: dlMonth0,
year: dlYear,
period,
periodLabel,
})
}
}
return results
},
},
// Årsstämma (AB): within 6 months of FY end per ABL 7 kap. 10 §. Replaces
// the former non-statutory 'bokslut' milestone (3 months had no legal
// basis). The stämma gates the årsredovisning chain: the AR is presented
// and adopted there, and the Bolagsverket filing (arsredovisning row,
// 7 months) requires the adopted AR.
{
type: 'arsstamma',
titleTemplate: 'Årsstämma räkenskapsår {periodLabel}',
description: 'Årsstämma för aktiebolag (senast sex månader efter räkenskapsårets utgång)',
condition: (s) => s.entity_type === 'aktiebolag',
priority: 'important',
linkedReportType: null,
generateDates: (year, settings) => {
// FY end month (1-indexed)
const fyEndMonth = settings.fiscal_year_start_month === 1 ? 12 : settings.fiscal_year_start_month - 1
// Last day of (FY end month + 6). Swedish fiscal years always end on
// the last day of a calendar month (BFL 3 kap.), so this equals the
// statutory six-month limit.
const results: DeadlineInstance[] = []
for (const endYr of [year - 1, year]) {
const dlMonth0 = ((fyEndMonth - 1) + 6) % 12
const dlYear = (fyEndMonth - 1) + 6 >= 12 ? endYr + 1 : endYr
if (dlYear === year) {
const lastDay = new Date(dlYear, dlMonth0 + 1, 0).getDate()
const periodLabel = fyEndMonth === 12 ? `${endYr}` : `${endYr - 1}/${endYr}`
results.push({
day: lastDay,
month: dlMonth0,
year: dlYear,
period: periodLabel,
periodLabel,
})
}
}
return results
},
},
]
/**
* Helper to get month label in Swedish
*/
function getMonthLabel(month: number, year: number): string {
const months = [
'januari', 'februari', 'mars', 'april', 'maj', 'juni',
'juli', 'augusti', 'september', 'oktober', 'november', 'december'
]
return `${months[month]} ${year}`
}
/**
* Get all applicable deadline configs for given company settings
*/
export function getApplicableDeadlineConfigs(
settings: CompanySettingsForDeadlines
): TaxDeadlineConfig[] {
return TAX_DEADLINE_CONFIGS.filter((config) => config.condition(settings))
}
/**
* Map from tax deadline type to report URL generator
*/
export const REPORT_URLS: Record<string, (period: { year: number; quarter?: number; month?: number }) => string> = {
vat: (p) => {
if (p.quarter) {
return `/reports?tab=vat&year=${p.year}&period=${p.quarter}`
}
if (p.month) {
return `/reports?tab=vat&year=${p.year}&period=${p.month}`
}
return `/reports?tab=vat&year=${p.year}`
},
'ne-declaration': () => '/reports?tab=ne-declaration',
}
/**
* Get the report URL for a deadline
*/
export function getReportUrl(
linkedReportType: string | null,
linkedReportPeriod: Record<string, unknown> | null
): string | null {
if (!linkedReportType || !linkedReportPeriod) {
return null
}
const urlGenerator = REPORT_URLS[linkedReportType]
if (!urlGenerator) {
return null
}
return urlGenerator(linkedReportPeriod as { year: number; quarter?: number; month?: number })
}