UK freelancers and small businesses chasing an overdue invoice who want the exact statutory amount, not a guess.
Jak działa
- Name this chase, e.g. "Invoice 0042".
- Enter the invoice amount, the current Bank of England base rate, and days overdue.
- Get the statutory interest, the fixed compensation band, and the total you can chase.
Co zyskujesz
- Uses the UK's OWN Late Payment of Commercial Debts (Interest) Act 1998 - Bank of England base rate plus 8% simple interest - not the EU Late Payment Directive, which is a different law with a different rate
- Fixed compensation banded by debt size (£40 under £1,000, £70 from £1,000 to £9,999.99, £100 at £10,000 or more) - both interest AND fixed compensation are claimable on the same invoice
- Interest is simple, not compounding, calculated per day overdue - the exact amount, not a rounded guess
- Chases saved by name: recalculating updates the same chase, not a duplicate
Zrzut ekranu

Szczegóły techniczne
Jak zaczac i uzywac
- Kup licencje — klucz (lic_...) pojawi sie na stronie zamowienia i w e-mailu.
- Zaloguj sie na app.synoriaai.com kluczem licencji.
- Bez instalacji — produkt dziala w przegladarce, na Twojej izolowanej instancji.
- Open the calculator page.
- Enter a name for the chase, the invoice amount, the Bank of England base rate, and the number of days overdue.
- Click Calculate to see the interest accrued and the total owed.
- Save the chase so you can recalculate it later by name.
Najczęstsze pytania
What does this tool actually calculate?
It calculates simple interest at the Bank of England base rate plus 8% per day overdue, plus the fixed compensation banded by debt size, under the Late Payment of Commercial Debts (Interest) Act 1998.
Is my invoice data stored or shared?
The tool works on the details you enter to produce the calculation. It does not send your data anywhere or use it for anything else.
Does it handle the EU Late Payment Directive?
No. It uses the UK's own Late Payment of Commercial Debts (Interest) Act 1998, which has a different rate from the EU Late Payment Directive.
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