FTB-C000711 / Financial concept

Interest accrual

Interest accrual measures interest earned or incurred over an interval under an agreed balance and rate convention.

Also known asaccrued interest

Intermediate 3 linked topicsEvidence-reviewed

Definitions

In plain terms

Interest can accumulate before a payment or capitalization updates the posted account balance.

Technical

D30 retains exact fractional interest until a declared posting/rounding boundary using eligible balances, rate intervals and a selected day-count basis.

Scope

Accrual measures interest. Capitalization changes the interest-bearing pool and can enable compounding; customer crediting or posting has its own declared boundary.

Examples

  • A synthetic daily calculation can earn a fraction of one cent without immediately posting a cent.

Common misconceptions

  • Rounding every daily fraction is not equivalent to rounding once at the selected boundary.

Concept relationships

Related

Required by

Where this concept is used

Evidence and governance

  1. Regulation DD, 12 CFR 1030.7: Payment of interest Consumer Financial Protection Bureau · official standard

    Supports: preferred label, short definition, variant distinction

    Limits: Not global product law; the glossary makes no compliance finding or mandated frequency claim.

  2. D30 glossary teaching-profile scope, Batch 013 The Fintech Builder · internal governed contract

    Supports: technical definition

    Limits: No independent regulatory mandate, real-bank dataset, service execution, external witness or production assurance is claimed.

Reviewed by
fintech-builder-batch-013
Last reviewed
2026-10-27
Next review
2027-10-27
Record status
evidence reviewed

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Written by

Fintech engineer building market-data and financial systems, and the author of every article, glossary record, and reference implementation on The Fintech Builder.