Late Payment Interest Calculator

Calculate late payment interest by uploading your invoice

Upload an unpaid invoice and we’ll help estimate the statutory interest and fixed late payment compensation that may be recoverable.

The invoice details are extracted where possible. You can review and correct the information before the calculation is produced.

What the calculator can estimate

Outstanding invoice balance

Review the invoice value, payments received and outstanding balance identified from the uploaded invoice.

Statutory interest

Estimate late payment interest using the statutory rate of 8% above the applicable Bank of England reference rate.

Fixed compensation

Estimate fixed late payment compensation based on the value of the overdue invoice.

Stage 1Invoice upload
Stage 2Review details
Stage 3Calculate value
Stage 4Summary

Upload your invoice to start

Upload an unpaid invoice and we will attempt to extract the key details. You can review and correct the information before calculating interest and compensation.

Upload your invoice

Upload the invoice so key details can be extracted. You will be able to review and correct the details before any calculation is made.

Extraction is not guaranteed. Please review and confirm all extracted details before relying on the calculation.

Upload invoice(s)

You can select multiple files at once. Accepted formats: PDF, PNG, JPG, JPEG, DOC, DOCX. Maximum 10MB per file.

Uploaded documents should only contain information relevant to this invoice and recovery enquiry.

Do not have the invoice available?

What is statutory late payment interest?

Statutory late payment interest may be available on qualifying business-to-business debts where payment is late. The statutory rate is calculated by adding 8% to the relevant Bank of England base rate for the applicable reference period.

Why payment terms matter

Where there are no contracted payment terms, statutory payment terms of 30 days may apply from the date the invoice was received. Where there are agreed contractual payment terms, those terms may affect when the invoice becomes overdue.

Late payment compensation

In addition to statutory interest, fixed late payment compensation may be recoverable depending on the size of the unpaid debt.

Debt size	Fixed late payment compensation
Up to £999.99	£40
£1,000 to £9,999.99	£70
£10,000 or more	£100

Late payment is often a recovery warning sign

An unpaid invoice should not sit unresolved. Delay can affect cash flow, weaken commercial leverage and increase the time spent chasing payment.