Compliance · T663 · Core Output Verification

APY-Earned Recompute

Recomputes the annual percentage yield earned for a periodic statement from the interest actually earned, the average daily balance and the actual days in the period, all figures you declare, then diffs the recomputed yield against the disclosed figure within a declared accuracy band. Returns MATCHES, DIVERGES with the exact difference, or INDETERMINATE when there is nothing to diff against. An independent recompute-and-receipt over your own declared inputs, not an audit of your core, and not a claim about what it should have disclosed.

Core Verify Yield Recompute Zero PII Client-Side
🔒 All inputs are processed locally in your browser. No data is transmitted. Do not enter real personal data — use synthetic or anonymised inputs only.
Account/customer identifiers in any upstream export are caller-supplied opaque tokens or hashes, never a real account number. This tool takes no identifier field at all.
Scope & reliance: This tool recomputes yield arithmetic from the figures you declare; it does not connect to any core, does not find "the vendor's bugs," and is not an audit of or endorsement/substitution for any core platform. Deterministic logic · no inference · zero PII · runs offline · CC BY 4.0.
Statement Period Inputs
Interest actually earned on the account for the period: the recomputed total from Interest Accrual Recompute (T661) or the core-reported figure.
The actual number of days for the period (1–366).
The days-weighted mean balance for the same period, supplied directly.
Disclosed Figure (to diff against)
The yield figure as disclosed on the periodic statement. Leave blank to see the recompute alone.
Default 0.05pp: the accuracy tolerance the cited rule itself sets for the disclosed yield.