Mortgage Penalty
Quickly estimate your mortgage prepayment penalty with 3 months interest and IRD calculation methods. Free prepayment charge calculator with charts and breakdown for Canada, US, UK.
About This Calculator
A mortgage prepayment penalty (also called a prepayment charge) is a fee lenders charge when you pay off your mortgage early -- either partially or in full. This compensates the lender for the interest income they lose when the loan is repaid ahead of schedule. This calculator helps you estimate what you would owe before making a prepayment decision.
The penalty is calculated using one of two methods depending on your mortgage type. For variable-rate closed mortgages, the penalty equals three months of simple interest on the prepayment amount. For fixed-rate closed mortgages, the penalty is the greater of three months interest or the Interest Rate Differential (IRD). The IRD measures the difference between your contract rate and the lender's current posted rate for a similar term, multiplied by your outstanding balance and remaining months in the term.
Regional Notes
Canada: Most Canadian mortgages are closed mortgages with prepayment penalties. The standard calculation method uses the greater of three months interest or IRD. Lenders typically allow prepayment privileges of 10-20% of the original principal annually without penalty.
United States: Under the Dodd-Frank Act, prepayment penalties on qualified mortgages are limited to the first three years of the loan term. The maximum penalty is 2% of the outstanding balance in years 1-2 and 1% in year 3. Some mortgages, especially those meeting qualified mortgage standards, may have no prepayment penalty at all.
United Kingdom: Early repayment charges (ERCs) typically apply only during the initial deal period (2-5 years for fixed-rate or discounted-rate mortgages). ERCs are usually calculated as a percentage of the outstanding balance -- typically 1-5% depending on how many years remain in the deal period.
Frequently Asked Questions
What is a mortgage prepayment penalty?
A mortgage prepayment penalty is a fee charged by lenders when you pay off your mortgage early, either partially or in full. It compensates the lender for the interest income they lose when the loan is repaid ahead of schedule. In Canada, most closed mortgages carry prepayment penalties. In the US, the Consumer Financial Protection Bureau restricts prepayment penalties to the first three years of the loan term, with a maximum of 2% of the balance in years 1-2 and 1% in year 3. In the UK, early repayment charges (ERCs) typically apply within the initial deal period (2-5 years) and are usually 1-5% of the outstanding balance.
How is the mortgage penalty calculated?
For variable-rate closed mortgages, the penalty equals three months of interest on the prepayment amount. For fixed-rate closed mortgages, the penalty is the GREATER of three months interest or the Interest Rate Differential (IRD). The IRD is calculated as: outstanding balance x (your contract rate - current posted rate for a similar term) / 12 x remaining months in your term. Our calculator computes both methods automatically and shows you the applicable penalty.
What is the Interest Rate Differential (IRD)?
The Interest Rate Differential (IRD) is the difference between your current mortgage interest rate and the lender's current posted rate for a similar term loan. This amount is multiplied by your outstanding balance and the remaining time in your term to determine the penalty. For example, if your rate is 5.5% and the posted rate is 4.4% with 26 months remaining on a $150,000 mortgage, the IRD penalty would be approximately $3,575. The IRD is typically higher than three months interest when current rates are lower than your contract rate.
Can I avoid paying a mortgage prepayment penalty?
Yes, several strategies can help reduce or avoid mortgage penalties. Most lenders allow prepayment privileges of 10-20% of the original principal per year without penalty. Using these privileges fully before making extra payments can reduce the penalty amount. Choosing an open mortgage (higher rate but no penalty), porting your mortgage to a new property, or waiting until the penalty period expires are other options. In the US, many mortgages have no prepayment penalty after the first three years due to CFPB regulations. In the UK, early repayment charges typically expire at the end of your fixed or discounted rate period.
Is this calculator free to use?
Yes, it is completely free to use with no registration required. Your inputs are saved in the URL so you can bookmark and share your calculation.
How accurate is the penalty estimate?
This calculator provides an estimate based on standard calculation methods. The actual penalty may differ depending on your specific mortgage contract terms, lender policies, and applicable regional regulations. Some lenders use different IRD calculation methods (e.g., using the posted rate minus a discount, or using a comparable rate from their current offerings). Always contact your mortgage provider for the exact prepayment charge before making a decision.
What is the difference between three months interest and IRD?
Three months interest is a simple calculation: outstanding balance x annual interest rate / 4. This typically results in a lower penalty when current interest rates are stable or rising. The Interest Rate Differential (IRD) compares your contract rate to the lender's current posted rate for a similar term. When current rates are lower than your contract rate, the IRD penalty is usually higher and becomes the applicable charge. Most fixed-rate closed mortgages use the higher of the two amounts as the penalty.