Accrued Interest Calculator

Work out accrued interest instantly with clear inputs, formula shown and shareable results.

About Accrued Interest Calculator

Between coupon dates interest accrues to the seller day by day. A buyer pays the clean price plus this accrued interest — the dirty price — so that whoever receives the next full coupon keeps only the part they earned.

Formula

Accrued interest

Accrued = coupon × days since last coupon / days in coupon period

Worked example

With the default values below, Accrued Interest Calculator returns Accrued Interest of $1,520.55. Change any input above and every figure here is recalculated in your browser.

Inputs used

Face Valueminimum 0: 100,000
Annual Coupon Rateaccepts 0–100 %: 7.5 %
Days Since The Last Couponaccepts 0–366: 74
Coupon Frequencyone of Semi-annual, Annual, Quarterly: Semi-annual

Results

Accrued Interest: $1,520.55
Full Coupon Amount: $3,750.00
Interest Accruing Per Day: $20.5479
Share Of The Coupon Period Elapsed: 40.55%

Step by step

1Values used
2Accrued interest
3Accrued Interest= 1,520.55
4Full Coupon Amount= 3,750.00
5Interest Accruing Per Day= 20.5479
6Share Of The Coupon Period Elapsed= 40.55

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax or fees or charges into account.
Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
Figures are estimates for planning only. Market returns are not guaranteed, and rates, limits and tax rules change. This is not financial or tax advice — speak to a qualified adviser before acting.
This is an estimate for general information and not professional financial, tax or legal advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Figures are estimates for planning only. Market returns are not guaranteed, and rates, limits and tax rules change. This is not financial or tax advice — speak to a qualified adviser before acting.

Frequently Asked Questions

What is the difference between clean and dirty price?

Clean price excludes accrued interest; dirty price is what actually settles. Quotes are clean, settlement is dirty.

Which day count applies?

Government bonds often use actual/actual, corporates commonly 30/360 — the convention changes the accrual slightly.