Mortgage Forbearance Cost Calculator

Mortgage forbearance pauses payments formally, usually during hardship. Missed payments capitalise to the balance and accrue interest over the remaining term. 200,000 balance, 5% rate, 6-month forbearance, 20 years remaining: about 5,100 interest added during forbearance, compounding to 13,500+ over the remaining term.

A worked example

Try the defaults: mortgage balance of 200,000, annual rate of 5%, forbearance duration of 6, remaining term of 20. The tool returns 5,052.37. You can adjust any input and the result updates as you type — no submit button, no reload. That's the real power here: seeing how sensitive the output is to one or two assumptions.

Now change forbearance duration to 12 months (one year instead of six). The accrued interest during forbearance rises to roughly 10,000, and the total lifetime cost climbs to around 27,000. Double the duration; the cost more than doubles because the larger unpaid balance compounds over the full remaining term. This illustrates why even modest forbearance periods can carry substantial long-term expense.

What moves the number most

The result responds to Mortgage Balance, Annual Rate, Forbearance Duration, and Remaining Term.

The formula behind this

Compound interest during forbearance; capitalised to balance after forbearance and compounded over remaining term. Everything the calculator does is shown in the formula box below, so you can check the math against your own spreadsheet if you want.

What the headline rate hides

Lenders quote a rate; what you pay is a blend of that rate, fees, insurance, and any early-repayment penalty built into the product. The figure here isolates the core interest cost so you can compare like-for-like across deals — then add the other costs separately before signing anything.

What this doesn't capture

The figure excludes arrangement fees, valuation costs, legal fees, insurance, and any early-repayment charges — those can add several thousand to the headline cost. Rate changes at renewal for fixed-term deals will shift the picture further. Use this for the core interest/principal math and add the other costs on top.

Common scenarios

Forbearance appears most often when borrowers face temporary income loss, unexpected expense, or prolonged illness. The calculator helps estimate the cost trade-off: pause payments now, absorb the interest cost later. A three-month forbearance on a smaller balance and shorter remaining term produces a modest lifetime impact. A twelve-month forbearance on a large balance with many years left amplifies the effect significantly.

What the result shows and does not show

• Shows: Interest accrued during the forbearance period itself, plus the total additional cost once that interest is added to the balance and compounds over the remaining loan term.
• Does not show: Whether forbearance is eligible or available; how the lender will structure the repayment plan after forbearance ends; any change to the interest rate; fees or penalties the lender may charge; the borrower's ability to repay the full amount after forbearance; impact on credit history or ratings.

For educational illustration only

This calculator models a simplified forbearance scenario and produces educational estimates. Actual forbearance agreements vary by lender and jurisdiction. Terms, rates, fees, and repayment structures differ. Use this output to understand the magnitude of interest cost, then speak with your lender to confirm exact terms and conditions before entering any formal forbearance agreement.