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HomeFinance & SavingsUK Early Payment Discount & APR Calculator 2026/27
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UK Early Payment Discount & APR Calculator 2026/27

Calculate early payment discount savings and equivalent annual interest rates (APR) for UK B2B trade credit terms.

Total Invoice Amount (£ Gross)
£
Early Settlement Discount (%)
%
Early Settlement Window (Days)
days
Standard Credit Net Term (Days)
days

Early Settlement Discount Summary

Discount Amount Saved (£) £100.00
Equivalent Effective Annualized Interest Rate (APR) 37.24% APR
Net Amount Payable if Paid Early £4,900.00

In UK Business-to-Business (B2B) trade credit, suppliers frequently offer an Early Payment Discount (or prompt payment discount) to incentivize buyers to settle invoices ahead of standard payment terms (e.g. 30, 60, or 90 days).

A classic trade credit discount term is “2/10 Net 30”, which means the buyer receives a 2% cash discount if the invoice is paid within 10 days, otherwise the full net invoice amount is due in 30 days.

While a 2% discount may sound modest, settling an invoice 20 days early to capture a 2% cash saving yields an astonishing annualized return rate (over 37% APR), making early settlement one of the highest-yielding cash management decisions a business can make.

⚙️ Rules & Thresholds

  • Standard Credit Terms Notation:
    • 2/10 Net 30: 2% discount if paid within 10 days; full balance due in 30 days.
    • 1/10 Net 30: 1% discount if paid within 10 days; full balance due in 30 days.
    • 2/10 Net 60: 2% discount if paid within 10 days; full balance due in 60 days.
  • Annualized Return Formula (APR Equivalent): APR = (Discount % / (100 - Discount %)) × (365 / (Full Credit Days - Discount Days)) × 100
  • VAT on Early Payment Discounts: Under UK VAT rules, output VAT must be calculated on the actual amount received after deducting early payment discounts.

📊 Practical Examples

Example 1: Analysing a "2/10 Net 30" Discount on a £5,000 Supplier Invoice
  • Gross Invoice Amount: £5,000
  • Terms: 2% discount within 10 days; Net due in 30 days (20 days early)
  • Discount Cash Saved: £100.00 (2% of £5,000)
  • Discounted Amount Payable: £4,900.00

APR Formula: `(2 / 98) × (365 / 20) × 100` = **37.24% APR**

Discount Saved: £100.00 (Effective Annualized Return: 37.24% APR)

📑 Common Pitfalls

  • Passing Up High-Return Discounts While Holding Idle Cash: Choosing to hold cash earning 4% in a bank account while passing up a 2% discount for paying 20 days early (37% APR equivalent) loses thousands in net business savings.
  • Taking Discounts After the Expiry Date: Paying on day 15 when terms specify a 10-day limit without supplier agreement violates trade credit terms and causes accounting reconciliation conflicts.
  • Borrowing at High Bank Rates to Claim Small Discounts: If short-term overdraft credit costs 15% APR and the early payment APR equivalent is only 10%, taking the discount using debt results in a net loss.

❓ Frequently Asked Questions (FAQ)

"2/10 Net 30" is a trade credit shorthand. It means the customer is entitled to deduct a 2% prompt payment discount from the invoice total if payment is completed within 10 calendar days. If not paid within 10 days, the full net invoice amount must be paid within 30 days.

The annualized return rate (APR) is high because the 2% cash discount is earned over a very short time horizon (e.g. 20 days early). Compounding that 20-day return rate across a 365-day year demonstrates that capturing the discount delivers a 37.2% annualized return on cash employed.

Under UK VAT rules, suppliers must account for VAT on the actual amount received. If an early payment discount is taken by the customer, the supplier must issue a credit note for the VAT difference or specify both the full and discounted VAT amounts on the original invoice.

The Prompt Payment Code (PPC) is a UK government-backed voluntary code administered by the Small Business Commissioner. Signatories commit to paying 95% of supplier invoices within 60 days, and paying 95% of small business supplier invoices within 30 days.