Interest calculator
Simple interest at the legal rate or the rate for commercial transactions, split over the rate periods it crosses: days × principal × rate ÷ 365. The calculator runs in your browser on belgica/interest-rates alone, without the court or territory data.
import { getInterestRate, getLatestKnownRateDate, interestRates } from 'belgica/interest-rates'
getInterestRate('2014-06-01', 'commercial', { contractAfter20130316: true })
getLatestKnownRateDate('legal') // '2026-12-31'Sources
Legal rate: FOD Financiën (financien.belgium.be), bekendgemaakt in het Belgisch Staatsblad. Commercial rate: https://financien.belgium.be/nl/over_de_fod/structuur_en_diensten/algemene_administraties/thesaurie/rentevoet_betalingsachterstand_handelstransacties.
A calculation aid, not legal advice: a judgment or contract can set other rules, such as capitalised interest.