Deferred Payment Loan Calculator
When you defer loan payments, interest keeps accruing even though you stop paying. This calculator shows you the full picture: how much interest builds up during the pause, what your balance will be when repayment resumes, how your monthly payment changes, and how much extra interest the deferral will cost you over the life of the loan. Choose the interest treatment your lender uses and the repayment structure you prefer, then see the numbers update instantly.
What is a deferred payment loan?
A deferred payment loan is one where the lender allows the borrower to pause scheduled payments for a set period, typically ranging from one to twelve months. Unlike a loan with no payments due (such as a zero-coupon bond), most consumer loans continue to accrue interest during the deferral window. At the end of the pause, the borrower resumes payments under a revised schedule that accounts for any interest that built up. Deferral programs are common during financial hardship, natural disasters, and economic crises, and lenders offer them for mortgages, auto loans, personal loans, and student loans.
How interest accrues during deferral
The most important thing to understand about loan deferral is that interest rarely stops. The four common treatments are: capitalization, where unpaid interest compounds and is added to your balance each month, increasing the principal you owe; paid monthly, where you make small interest-only payments during the pause, keeping the principal flat; accumulated separately, where interest builds in a side account and is repaid as a lump sum after the deferral ends; and interest-free, which is rare and usually limited to government relief programs. Capitalization is the most expensive option because compounding on a growing balance snowballs. If your lender offers the choice, paying interest monthly almost always costs less over the life of the loan.
How repayment is restructured after deferral
When repayment resumes, lenders typically offer three structures. The first adds the deferred months back into a higher payment while keeping the original payoff date, so you pay more each month but finish on time. The second extends the term by the deferral period and raises the payment modestly, spreading the cost over longer. The third keeps your original monthly payment unchanged but extends the term as many months as needed to amortize the new, higher balance. The same-end-date option usually costs the least in total interest because you pay off the balance faster, but it demands the highest payment. The extended-term options reduce monthly strain at the cost of more interest overall.
When deferral makes financial sense
Deferral is a legitimate tool for bridging a temporary cash-flow gap: a medical emergency, a job transition, or a one-time large expense. The key is knowing the full cost before you accept. This calculator shows you exactly how much extra interest a deferral will cost and what your revised payment will be. If the extra cost is small relative to the relief it provides - or if the alternative is a missed payment and a credit-score hit - deferral can be the right choice. Where possible, choose the interest-free or paid-monthly option over full capitalization, and pick the shortest term restructuring you can afford. Always confirm the terms in writing before the deferral begins.
Interest treatment modes compared
| Mode | Balance change | Cost to borrower | Common use |
|---|---|---|---|
| Capitalized | Grows each month | Highest - compounding adds to principal | Student loan forbearance, auto loans |
| Paid monthly | No change | Moderate - only interest owed | Credit card hardship, some mortgages |
| Accumulated separately | No change | Moderate - lump sum due later | Some lender programs |
| Interest-free | No change | Zero extra cost | Rare - government relief programs |
How each mode handles interest during the deferral window and the effect on your balance.
Frequently asked questions
Does deferring my loan hurt my credit score?
A formally agreed deferral, often called forbearance, is reported to credit bureaus as current, not delinquent, so it should not lower your score the way a missed payment would. Always get the arrangement in writing before you stop paying, and verify with your lender that they will report the account as current during the deferral period.
What is the difference between deferment and forbearance?
The two terms are often used interchangeably for consumer loans. In student loan contexts, deferment typically means no interest accrues on subsidized loans, while forbearance always accrues interest. For other loans the distinction depends on the lender. In either case, ask your lender explicitly whether interest will capitalize, because that is the single biggest cost driver.
Does interest compound during capitalized deferral?
Yes. With capitalized deferral, each month's unpaid interest is added to the principal, and the next month's interest is calculated on that larger balance. The compounding effect is small over a short deferral but can add up significantly over six or twelve months, especially on large balances at higher rates.
Can I defer part of my payment instead of all of it?
Some lenders offer partial deferral, allowing you to pay only principal or only interest during the pause. This calculator models full-payment deferral. If your lender offers partial deferral, use the "paid monthly" mode to approximate an interest-only scenario, which is the most common form of partial deferral.
How do I find out what my lender will charge during deferral?
Ask your lender for the deferral agreement in writing before you sign anything. Key questions: Will interest accrue? Will it capitalize (be added to the balance)? What will my new monthly payment be? When does the first post-deferral payment come due? Some lenders add the paused payments to the end of the loan with no extra interest; others capitalize aggressively. The written agreement is the only reliable source.