Late Payment Interest Calculator

Calculate interest owed on overdue B2B invoices — simple interest basis.

Invoice Amount (RM)

Invoice Date

Payment Terms (days)

Interest Rate (% p.a.)

Rates last verified: 2026-01-01 · Malaysian commercial default is 8% p.a. (simple interest)

Days Overdue

Interest Owed

RM 32.88

Due Date

28 May 2026

Total Now Owed

RM 10,032.88

Formula: Interest = Principal × Rate ÷ 100 × Days ÷ 365 (simple interest). Include the agreed interest rate in your invoice payment terms. Always verify with a lawyer for formal disputes.

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