How to Use This Tool
Compare a supplier discount with the financing cost of paying sooner. Calculate early-payment discount value, annualized discount yield and net benefit using your invoice terms and cost of cash.
The decision this tool supports
A discount can look small while its annualized return is far above the buyer's short-term financing cost, or the reverse when cash is unusually expensive. This page keeps the decision bounded to discount saved and the supporting outputs shown beside it. Early Payment Discount does not import an account, infer a market rate, or silently substitute an industry average.
Inputs and units
The Early Payment Discount calculation uses Invoice amount, Discount rate, Days paid early, Annual cost of cash. Keep all money values in one currency and all time, distance, mass, energy or volume entries in the unit printed beside the field. Mixing Early Payment Discount scopes can produce a plausible number with the wrong meaning.
- Invoice amount is entered in currency.
- Discount rate is entered in %.
- Days paid early is entered in days.
- Annual cost of cash is entered in %.
Formula and worked check
Discount saved = invoice × discount rate. Annualized yield = discount ÷ early-payment amount × 365 ÷ days paid early. For a $10,000 invoice, 2% discount, 20-day acceleration and 8% annual cash cost, the tool returns $200 saved, $9,800 paid, 37.2% annualized yield and $157.04 net benefit. The Early Payment Discount default is an executable known-answer case, not a benchmark or recommendation. Change one input and verify that the direction of discount saved still matches the stated relationship.
How to interpret the result
A positive net benefit means the entered discount exceeds the modeled carrying cost for the earlier payment period; it does not prove liquidity is available. The additional Early Payment Discount outputs expose the denominator, comparison, capacity or reverse value needed to audit the primary result instead of presenting one unexplained number.
Assumptions
- The invoice and discount are eligible under the actual supplier terms.
- The annual cash-cost rate is entered as a simple planning rate.
- A 365-day year is used.
Save the Early Payment Discount input values and date with any material decision. A later Early Payment Discount rerun is reproducible only when the same assumptions and units are available.
Limitations and safety boundary
The model excludes taxes, late-payment risk, supplier relationship effects, borrowing limits and compounding conventions. Early Payment Discount is an estimate and cannot replace a contract, local code, licensed professional, calibrated measurement, lender statement or platform report where one governs the decision.
Source and privacy
The Early Payment Discount definition or rule was checked against U.S. Small Business Administration — Manage your finances on 2026-08-26. Recheck U.S. Small Business Administration — Manage your finances when a specification or policy behind Early Payment Discount can change. Early Payment Discount arithmetic runs in this browser tab; ecech does not receive the values through a calculation API.
Sources & assumptions
Tool Spec v2 · verified 2026-08-26. Platform rules and fees can change; the editable inputs remain authoritative for your account.
Official references
- U.S. Small Business Administration — Manage your finances (checked 2026-08-26)
Model assumptions
- The invoice and discount are eligible under the actual supplier terms.
- The annual cash-cost rate is entered as a simple planning rate.
- A 365-day year is used.
- The model excludes taxes, late-payment risk, supplier relationship effects, borrowing limits and compounding conventions.
