Accrued Interest Calculator (30/360)
Accrued interest under the US corporate/agency 30/360 day-count from the last coupon date to settlement.
Formula
30/360 (bond basis) treats every month as 30 days and the year as 360 — the standard for US corporate, agency and municipal bonds. Buyers pay clean price + accrued; this computes the accrued leg of the invoice.
Not financial advice — for informational and analytical use only. Verify all figures with a qualified professional before acting on them.
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
Need accrued interest calculator results fast? Analysts, founders, traders and finance professionals use the Accrued Interest Calculator to skip the spreadsheet and get a defensible answer in one step — free, private and instant.
About Accrued Interest Calculator (30/360)
Accrued interest under the US corporate/agency 30/360 day-count from the last coupon date to settlement. 30/360 (bond basis) treats every month as 30 days and the year as 360 — the standard for US corporate, agency and municipal bonds. Buyers pay clean price + accrued; this computes the accrued leg of the invoice. The governing relationship is AI = F × c × days₃₀⁄₃₆₀ / 360. The Accrued Interest Calculator computes entirely in your browser — free, private (your figures never leave your device) and instant, recalculating live as you change any input.
How to use Accrued Interest Calculator (30/360)
- 1Enter Face value (currency), Coupon rate (% p.a.), Last coupon — month, Last coupon — day, Settlement — month, Settlement — day into the Accrued Interest Calculator.
- 2The result is computed automatically using AI = F × c × days₃₀⁄₃₆₀ / 360 — there is no button to press.
- 3Change any input to model a different scenario, then copy or share the result.
Why use Accrued Interest Calculator (30/360)?
- ✓Computes accrued interest calculator instantly with the correct formula — no spreadsheet needed
- ✓100% free and unlimited, with no sign-up, login or paywall
- ✓Runs entirely in your browser, so the figures you enter stay private
- ✓Shows the formula, a live worked example and references so you can defend the number
Frequently asked questions
What is the formula behind the Accrued Interest Calculator?+
Accrued Interest Calculator uses AI = F × c × days₃₀⁄₃₆₀ / 360. 30/360 (bond basis) treats every month as 30 days and the year as 360 — the standard for US corporate, agency and municipal bonds. The tool substitutes your actual inputs into this relationship and shows the worked example step by step.
What inputs does the Accrued Interest Calculator need?+
Enter Face value (currency), Coupon rate (% p.a.), Last coupon — month, Last coupon — day, Settlement — month, Settlement — day and the result updates immediately — there is no button to press. Change any value to model a different scenario in real time.
Is the Accrued Interest Calculator free, and is my data private?+
Yes — it is completely free with no sign-up or usage limit, and it runs entirely in your browser, so the numbers you enter are never uploaded or stored on any server. It is for informational and analytical use, not financial advice.
What should I watch out for when using the Accrued Interest Calculator?+
Buyers pay clean price + accrued; this computes the accrued leg of the invoice.
What is the Accrued Interest Calculator based on?+
The method follows authoritative sources: ISDA 2006 Definitions §4.16(f) — 30/360; SIFMA standard securities calculation methods. The formula and references are shown on the page so you can verify and cite the result.
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