Balloon Payment Calculator

Calculate monthly payment, remaining balance at maturity, and final balloon payment for a partially amortizing loan, with an optional target balloon amount.

Balloon payment planner Estimate the monthly payment and balloon due on a partially amortizing loan using monthly compounding and a fixed maturity term.

Assumptions

Terms are rounded to the nearest month. If you enter a target balloon, the monthly payment is solved to leave that balance at maturity; otherwise, the calculator amortizes the loan over the full amortization term and shows the residual balloon after the shorter loan term.

Display currency

The currency preference changes only the displayed amounts, not the underlying loan maths.

Enter values Add a principal amount, APR, amortization term, and balloon term to estimate the payment and balloon.

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Loans

Balloon payment calculator guide: monthly payment, remaining balance, and final lump sum

A balloon payment calculator estimates the regular monthly payment on a partially amortizing loan and the large lump sum that remains due at maturity. This version lets you enter the principal, APR, full amortization term, and the shorter balloon term, then either show the natural remaining balance at maturity or solve the monthly payment needed to leave a chosen target balloon amount.

What a balloon structure changes

A standard fully amortizing loan spreads principal and interest so the balance reaches zero at the end of the term. A balloon structure shortens the actual loan term while keeping payments based on a longer amortization pattern, which leaves a large balance still outstanding at maturity.

That design usually lowers the monthly payment before maturity, but it pushes a refinancing, sale, or large cash payoff decision into the future. The useful planning question is not just how low the monthly payment looks, but how large the remaining balance will be when the balloon comes due.

Core balloon-loan maths

The calculator converts APR into a monthly rate, converts the amortization and balloon terms into months, and then applies standard time-value-of-money formulas. If no target balloon is entered, the monthly payment is the fully amortizing payment over the longer amortization term and the calculator reports the remaining balance after the shorter balloon term.

If you do enter a target balloon, the direction flips: the remaining balance at maturity is set first, and the monthly payment is solved so that the loan reaches that balance on the selected balloon date.

Monthly rate = APR / 12

APR is converted into a monthly nominal rate for the fixed-rate planning model.

Monthly payment = amortizing payment over the chosen balance target

Without a target balloon, the payment is based on the full amortization term. With a target balloon, the payment is solved to leave that balance at maturity.

Balloon payment = Remaining balance at balloon maturity

The final lump sum is the unpaid principal still outstanding after the shorter balloon term.

Worked example: 100,000 at 6% with a 30-year amortization and 5-year balloon

Suppose the principal is 100,000, APR is 6%, the amortization term is 30 years, and the balloon comes due after 5 years. In this calculator, the regular payment is about 599.55 per month because the payment is based on the longer amortization schedule rather than a full 5-year payoff.

After 60 months, the remaining balance is about 93,054.36, which becomes the balloon payment. Total payments before the balloon are about 35,973.03, and interest paid before maturity is about 29,027.39. That contrast explains the appeal and the risk of balloon structures: the monthly payment looks manageable, but most of the principal is still unpaid when the term ends.

What this estimate excludes

This page is a fixed-rate planning model. It does not include taxes, insurance, fees, escrow, lender-specific underwriting conditions, prepayment penalties, rate resets, or a guaranteed refinance path at maturity.

Use it to understand the relationship between the regular payment and the final lump sum. Before taking a balloon loan, verify whether you can refinance, sell, or pay the remaining balance when the balloon date arrives.

Further reading

Frequently asked questions

Why is the balloon payment so large even after years of monthly payments?

Because the monthly payment is usually based on a longer amortization schedule than the actual loan term. The loan matures before the balance can fully amortize, so a large principal amount remains due at the end.

 Does a lower monthly payment mean the loan is cheaper?

Not necessarily. A balloon structure can lower the regular payment, but it can still leave most of the balance outstanding when the loan matures. You need to consider the balloon amount, not just the monthly payment.

 What if I plan to refinance before the balloon date?

That may be possible, but it is not guaranteed. Refinancing depends on rates, property value, credit profile, and lender policy when the balloon comes due.

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