calculating the principal balance over time, taking into account the effects of charges, interest and fees

functions for handling received payments and calculating interest and/or charges where necessary

calculating the APR according to various country-specific regulations

convenience functions and options to help with calculations

a penalty charge > NB: differences between charges and fees: > - charges are not up-front amounts, they are incurred as a result of a breach of agreed terms > - charges are not added to the principal balance and do not therefore accrue interest

a .NET Framework polyfill equivalent to the DateOnly structure in .NET Core

a product fee > NOTE: differences between fees and charges: > - fees are up-front amounts paid under agreed terms for receiving an advance > - fees are added to the principal balance and therefore accrue interest

convenience module for generating HTML tables, optimised for amortisation schedules

convenience module for generating HTML tables, optimised for amortisation schedules

methods for calculating interest and unambiguously expressing interest rates, as well as enforcing regulatory caps on interest chargeable

functions for settling outstanding payments

functions for rescheduling payments after an original schedule failed to amortise

functions for generating a regular payment schedule, with payment amounts, interest and APR

an unambiguous way to represent regular date intervals and generate schedules based on them note: unit-period definitions are based on US federal legislation but the definitions are universally applicable