LandlordGauge

Security deposit interest calculator

Estimate security deposit interest under state and DC rules, using your bank rate, rent and tenancy facts where the law depends on them.

Your deposit

City ordinances are outside this version.

Deposit principal only, excluding interest, fees and prepaid rent.

Format: MM/DD/YYYY

The payment date, not the date the lease was signed. Covered dates: January 1, 2015 to December 31, 2026.

Format: MM/DD/YYYY

Use the date of the landlord’s good-faith return or accounting, not the move-out date. An earlier court judgment needs a separate calculation.

Your interest check

Example result

Estimated interest owed

$10Minnesota

Minnesota’s 1% simple-interest rule applies across 12 whole months under the stated assumptions.

Calculation basis

12 months, from the first day of the month after full payment through the last day of the return or good-faith accounting month. Deposit × 1% × 12 ÷ 12; no compounding, no earlier judgment and no interest already paid.

Example: Minnesota.

Rates as of