Law Interest Calculator

  • Civil litigation
  • Labor
  • Commercial
  • Insurance
  • Family
  • Banking
  • Real estate
  • Mergers & Acquisitions
  • From simple to very complex calculations
  • Interest between two dates on one amount
  • Prejudgment and postjudgment interest calculation for all US states, Canadian provinces and European countries
  • Collection of judgments, including precomputed prejudgment interest, court fees, and other fees bearing interest or not
  • Predefined or personalized refund order for interest, fees, prejudgment interest, other fees and principal
  • Garnishments
  • Arrears (alimony, salaries, overtime pay, rent, etc.)
  • Present value and structured settlements
  • Collection of debt claims and accounts receivable
  • Calculation of interest, fees, principal and balances for partial, late, or unpaid payments on debts, loans, and mortgages
  • Simple interest or compound interest
  • Fixed or variable interest rates
  • Over  150 interest tables (legal rates, central bank indices) and indexation rates (consumer price indices) automatically updated in the software
  • Margill works like a charm. It does our calculations perfectly while always keeping an eye on it’s tables updates. When we did have questions about it, the support team was efficient and devoted to help us promptly.
    A five star product!

    Francis Lessard, Network administrator Donati Maisonneuve

  • … I always appreciate your helpfulness and cooperation. It is a pleasure to work with the Margill Team.

    Janet Raffaelli Legal Assistant, Cummings, McClorey, Davis & Acho PLC

  • After four decades of primarily trial work I am expanding a long-held interest in Elder Law and Special Needs planning. I believe that Margill will continue to be an invaluable tool for me. It certainly has met every need I thus far have presented to it!

    Jerome V. Porter Law Office of Jerome V. PorterLittleton, Colorado

  • The calculations I do are always unique situations such as a client telling me how much money they want per month and what the overall amount paid needs to be in 30 years. I then need to figure out the initial sales price (the original principal) and interest rate to make it work. Previous software I have used has left much to be desired. I’m impressed by the program’s ability to handle my strange or unique scenarios. Thank you so much for your help!

    Landon R. Hodges, Esquire, STEINBACHER, GOODALL & YURCHAK

Specialized Interest Calculation software built for legal professionals

Generate accurate prejudgment and postjudgment interest calculations in seconds, with no guesswork and no calculation errors.

Thousands of lawyers, judges, debt collection agencies, legal departments, government, insurance companies and labor unions trust Margill for its accuracy, legal compliance and proven reliability in the legal community.

When interest impacts a judgment, a settlement, or a collection file, precision is not optional. Margill gives teams a consistent, defensible method that stands up to review.

Reliable interest calculations, even in complex situations

Margill interest calculator is designed to meet the requirements of legal files where even the smallest approximation can lead to disputes or unnecessary delays.

The calculation engine supports:

  • Calculations of pre and post judgment interest
  • Calculations of arrears
  • Unpaid, partial or late payments on loans and mortgages
  • Present value (assessment of lump sum vs. structured settlement)
  • Fixed and variable interest rates
  • Simple, compound, and capitalized interest

Calculation rules are applied consistently across the entire file, which limits discrepancies and facilitates result validation, both internally and in litigation contexts.

Reduce calculation errors and secure collectible amounts

Manual interest calculations or by fragmented processes such as spreadsheets increase the risk of errors.

Margill automates critical calculations in order to:

  • reduce costly calculation errors
  • secure collectible amounts
  • improve the monitoring of late or unpaid payments

Teams work with consolidated, up-to-date information, making it possible to produce calculations that are clear, understandable, and legally defensible.

Discover other Margill solutions

In addition to the Margill Interest Calculator for Law, Margill offers solutions designed to support different operational needs:

  • Margill Loan Manager
    Automates, for a handful or for thousands of loans and other financial instruments (mortgages, lines of credit…):  interest calculation, amortization schedule production, payment tracking, customer reminders, electronic fund transfer (EFT), fees based on your rules, reporting and so much more. 
  • Margill Interest Calculator
    Enables fast validation of day-to-day interest calculations outside a litigation context, using the same calculation rigor.
  • Interest Rate Tables
    Provide access to legal rates, banking rates, and reference indices used in financial and legal calculations.
  • Interest Calculation Services
    Support audits, litigation matters, and complex or one-off calculation requirements.
  • Custom Programming Services
    Adapt calculation rules and workflows to the specific operational and regulatory requirements of each organization.

Frequently asked questions about the Margill Law Interest Calculator

Yes. It can calculate interest using fixed rates or variable rates, including the rate changes over time.

Yes. It supports calculations that include partial, late, or unpaid payments in loans and mortgages while keeping the calculation logic consistent across the file. One obtains the true, up to date balance owed by the debtor.

Yes. The refund order or allocation of interest, fees and principal can be adapted, either system-wide or on an individual calculation basis.

Yes. The software supports both simple interest and compound interest depending on the legal or financial context of the case.

Interest calculation is mathematical. Therefore, users adapt the calculations to their jurisdiction’s regulations using the various methods and interest tables available in Margill. Margill is used in over fifty countries including the United States, Canada, Great Britain (England), Australia, several African countries, and many others.

Margill’s Law version includes additional calculations tailored to the special needs of the legal field: statutory/legal interest, calculation of interest on judgments including court costs, pre and post judgment interest and the option to define special distribution orders or sequence for interest, fees and principal.

It is used to calculate interest in legal files such as judgments, collections, arrears, and other situations where interest must be accurate and defensible.

Users can access information such as accrued interest and fees, payments received split between interest, fees and principal, and balances which helps with validation and reporting.

It is built for lawyers, judges, legal teams, collection agencies, government organizations, litigation departments and insurers who need accurate interest calculations that can be reviewed and explained.