Invoice format and locale facts for Sierra Leone

Why these defaults?

The country code comes from ISO 3166. Unicode CLDR supplies presentation-oriented locale, currency, paper, date, language, calendar, numbering, and direction metadata. Defaults reduce setup time; they do not decide what a valid document must contain.

Recorded official or regional-official language tags: en.

Selected national claims reviewed

Document vocabulary and checks

Sierra Leone's GST invoice particulars, six-year retention and certified electronic-cash-register authority boundary are reviewed. Registration, rates, exemptions, TIN validation, ECR onboarding and transaction-specific treatment remain separate checks.

Evidence snapshot: 3 official sources · last reviewed 2026-07-19. This is scoped guidance, not a jurisdiction-wide compliance certification.

Tax labels: GST. Business identifier labels: TIN.

• Required when applicable: A Sierra Leone GST invoice shows supplier name, address and TIN; time of supply; consecutive invoice number; registered customer name, address and TIN; description and quantity or service extent; sale type; GST per description and rate; total exclusive of GST; discount rate; total GST; and total inclusive of GST.Evidence SL_NRA_GST · reviewed 2026-07-19 · review by 2027-01-19 · automation advisory only
• Required when applicable: Keep sales, purchase and prescribed GST records for at least six years.Evidence SL_NRA_GST, SL_NRA_GST_ACT · reviewed 2026-07-19 · review by 2027-01-19 · automation advisory only
• Required when applicable: Registered GST businesses use an electronic cash register as specified by the Commissioner-General. The CIS/SDC signs receipts, stores data and sends it to NRA. A Formnivo PDF is not an NRA ECR invoice or signed receipt.Evidence SL_NRA_ECR · reviewed 2026-07-19 · review by 2027-01-19 · automation advisory only

Identifier format guidance: See the relevant authority.