diff --git a/DECISIONS.md b/DECISIONS.md
index 8e31ad8b..f746f4c6 100644
--- a/DECISIONS.md
+++ b/DECISIONS.md
@@ -1287,3 +1287,4 @@ One line per decision: `[YYYY-MM-DD] <decision>: <why>`. Appended by agents and
 [2026-08-26] Dashboard layout diet (responsiveness plan B4): the four nav-visibility probes (WooCommerce/Shopify connections, webshop orders, mileage trips) became one SECURITY INVOKER RPC get_dashboard_nav_flags (20260826120000) rather than a client-side badge hook, because the flags gate whole nav rows and loading them after mount pops rows into the sidebar; RLS still applies inside the function. The layout's getDashboardAuthContext now verifies the JWT locally (lib/auth/claims.ts, shared with requireAuth) with getUser() as the fallback: the proxy already did the per-request revocation check, so the layout's own getUser() was a second Supabase Auth round trip on every hard load. The user-keyed reads (profile, preferences, memberships) moved into the company-resolution wave and the memberships join now supplies the active company row and role, so the layout went from ~20 network calls in 4 waves to ~12 in 2. The memberships-with-embedded-settings single query was NOT attempted: the PostgREST embed shape was unverified and the settings-names query is parallel anyway.
 [2026-08-26] OAuth consent pre-checks ALL scopes (one-click, list collapsed in details): founder call after the read-only default dead-ended agent flows; defensible because every write is staged for approval, rows stay untickable, grant revocable.
 [2026-08-26] accounting_method optional with form default (AB=accrual, EF=cash) in CompanySetupSchema/planCompanySetup: founder call to cut agent onboarding input to orgnr + moms period; the default is flagged (accounting_method_defaulted) and must be read back in the preview, never silent.
+[2026-08-26] Removed the 1580 entry from ACCOUNT_DESCRIPTIONS and flipped AccountNumber name precedence to DB-name-first: the entry falsely labeled 1580 'Fordran for skatt' (tax receivables are 1640/1650; 1580 was traditionally card/coupon receivables, moved by BAS to 1686), and the hardcoded name silently overrode users' own kontoplan names. No replacement entry: 1580 is deliberately off-catalog, so companies with a legacy 1580 now see their own account name.
diff --git a/components/ui/account-number.tsx b/components/ui/account-number.tsx
index 627e638f..de899096 100644
--- a/components/ui/account-number.tsx
+++ b/components/ui/account-number.tsx
@@ -46,7 +46,10 @@ export function AccountNumber({
   // descriptions for non-hardcoded accounts are available.
   useBasReference()
   const desc = getAccountDescription(number)
-  const displayName = desc?.name ?? name
+  // The company's own account name wins over the BAS reference name: a chart
+  // row is user-editable data and must never be visually overridden by our
+  // hardcoded copy. The tooltip still shows the BAS name as reference.
+  const displayName = name || desc?.name
 
   const numberElement = (
     <span
diff --git a/lib/bookkeeping/__tests__/account-descriptions.test.ts b/lib/bookkeeping/__tests__/account-descriptions.test.ts
index dfbf0b09..1f574335 100644
--- a/lib/bookkeeping/__tests__/account-descriptions.test.ts
+++ b/lib/bookkeeping/__tests__/account-descriptions.test.ts
@@ -14,6 +14,13 @@ describe('account-descriptions', () => {
       expect(getAccountDescription('9999')).toBeUndefined()
       expect(getAccountDescription('')).toBeUndefined()
     })
+
+    it('has no entry for 1580 (removed from BAS; was mislabeled as tax receivable)', () => {
+      // Tax receivables are 1640/1650. Card/coupon receivables moved from
+      // 1580 to 1686. 1580 must stay undefined so a company's own account
+      // name is what renders.
+      expect(getAccountDescription('1580')).toBeUndefined()
+    })
   })
 
   describe('data completeness', () => {
diff --git a/lib/bookkeeping/account-descriptions.ts b/lib/bookkeeping/account-descriptions.ts
index f107b750..e0267742 100644
--- a/lib/bookkeeping/account-descriptions.ts
+++ b/lib/bookkeeping/account-descriptions.ts
@@ -18,12 +18,11 @@ const ACCOUNT_DESCRIPTIONS: Record<string, AccountDescription> = {
     type: 'asset',
     explanation: 'Pengar som kunder är skyldiga dig för skickade fakturor som inte betalats ännu.',
   },
-  '1580': {
-    name: 'Fordran för skatt',
-    classLabel: 'Tillgångar',
-    type: 'asset',
-    explanation: 'Pengar du har att fordra från Skatteverket, t.ex. överskjutande moms.',
-  },
+  // 1580 is intentionally absent: BAS moved card/coupon acquirer receivables
+  // from 1580 to 1686, and 1580 is excluded from the BAS 2026 catalog as
+  // non-standard (see bas-reference.test.ts). A hardcoded entry here once
+  // mislabeled it as a tax receivable (that is 1640/1650); companies with a
+  // legacy 1580 see their own account name instead.
   '1630': {
     name: 'Skattekonto',
     classLabel: 'Tillgångar',