Know what your overdue invoice may be worth.
Check whether UK late-payment rules may apply, calculate potential interest and compensation, and turn the result into a practical recovery plan.
Free late-payment check
Answer three eligibility questions, then enter the invoice amount and due date.
Eligibility
Check whether this calculator may apply
Is the unpaid invoice for goods or services supplied to another business?
Is the invoice disputed?
Does your contract already specify its own late-payment interest?
Invoice details
Tell us about the unpaid invoice
Enter the date your customer agreed to pay.
Complete the eligibility questions above before calculating.
Learn before you escalate
Understand UK late-payment rules, then decide what to do next.
The calculator stays focused on your invoice. Detailed explanations live in separate guides so you can understand interest, compensation and practical recovery steps without cluttering the calculation.
Late-payment interest
How statutory interest is calculated for potentially eligible commercial debts.
Read guide →
Recovery compensation
How the £40, £70 and £100 fixed recovery sums work.
Read guide →
Chasing an unpaid invoice
A practical sequence for reminders, evidence and proportionate escalation.
Read guide →
Late Payment Act
The UK legal framework behind statutory interest and recovery compensation.
Read guide →