Balloon Loan Calculator
Low monthly payments now, one large balloon payment at the end
🎈 Loan details
Used to size the monthly payment
When the balloon is due
Last updated June 2026
Method: Monthly payments use the standard amortization formula applied to the long amortization term. The balloon is the exact remaining principal balance at the end of the shorter balloon term, computed month by month from the amortization schedule.
Included: Monthly payment, balloon amount due, principal repaid before the balloon, interest paid to that point, total of payments plus balloon, and a year-by-year balance table.
Not included: Lender fees, points, refinancing or closing costs, prepayment penalties, and any rate changes. Results are estimates, not a loan offer.
Balloon loan calculator: how it works
A balloon loan gives you a comfortable monthly payment for a few years, then hands you a single, very large bill - the balloon - for almost everything you still owe. Take a $250,000 loan at 7% with payments stretched over a 30-year amortization but a 5-year balloon term: you would pay about $1,663 per month, yet still owe roughly $235,000 as a lump sum at the end of year five. This balloon payment calculator shows both numbers so you are never surprised by the size of that final obligation.
The formula behind the numbers
The monthly payment is computed with the standard amortization formula, but using the long amortization term, not the short balloon term:
M = P × r × (1 + r)n ÷ ((1 + r)n − 1) where P is the loan amount, r is the monthly interest rate (annual rate ÷ 12), and n is the number of amortization months (amortization years × 12). The calculator then runs that payment forward only for the balloon term and reads off the leftover balance:
Balloon = remaining balance after (balloon years × 12) payments Because the payment was sized for a much longer payoff, only a sliver of principal is gone when the balloon arrives - which is exactly why the lump sum is so large.
A worked example, step by step
Suppose you borrow $250,000 at 7% with a 30-year amortization and a 5-year balloon:
- The monthly rate is 7% ÷ 12 = 0.5833%, and the amortization period is 30 × 12 = 360 payments.
- Plugging into the formula gives a monthly payment of about $1,663.
- Over the first 60 payments (5 years), you pay roughly $84,800 in interest and only about $15,000 in principal.
- That leaves a balance of about $235,000 - the balloon that is due in a single payment at month 60.
- Your total cash outlay is roughly $99,800 in regular payments plus the $235,000 balloon, about $335,000 before any refinance or sale.
The result updates instantly when you change any input, so you can test different amortization and balloon terms and watch the balloon grow or shrink.
How to use this calculator
- Loan amount: enter the amount you are borrowing (the principal).
- Interest rate: use the quoted annual rate for the loan.
- Amortization term: the long schedule used to size the payment - commonly 30 or 40 years. A longer amortization means a lower monthly payment but a larger balloon.
- Balloon term: when the full balance comes due - often 3, 5, or 7 years. A shorter balloon term leaves a bigger balloon.
Press Calculate to see the monthly payment, the balloon due, and a year-by-year table of how the balance falls until the balloon hits.
Who balloon loans are for
- Commercial real estate investors who plan to sell or refinance a property within a few years.
- Borrowers expecting a lump sum - a bonus, asset sale, or inheritance - timed to cover the balloon.
- House flippers and bridge borrowers who need low carrying costs while they renovate and resell.
- Buyers using seller financing where a balloon is a common way to keep the deal short.
- Businesses financing equipment they intend to upgrade or trade in before the balloon date.
Key terms explained
- Balloon payment: the single large lump sum that pays off the remaining balance at the end of the balloon term.
- Amortization term: the hypothetical long payoff period used only to calculate the monthly payment - the loan does not actually run this long.
- Balloon term: the real length of the loan, after which the balloon is due.
- Principal: the amount borrowed; balloon loans repay very little of it before the balloon.
- Reset / refinance: rolling the balloon balance into a new loan when it comes due, subject to new approval and rates.
Three scenarios compared
Using the same $250,000 loan at 7%, watch how the structure changes the balloon (figures rounded for illustration):
- 30-year amortization, 5-year balloon: about $1,663/month and a balloon near $235,000 - low payment, very large balloon.
- 30-year amortization, 7-year balloon: about $1,663/month with a balloon near $228,000 - two extra years pay down slightly more principal.
- 15-year amortization, 5-year balloon: about $2,247/month and a balloon near $194,000 - a higher payment builds equity faster, so the balloon is smaller.
The lesson: a longer amortization buys a lower payment but inflates the balloon; a shorter amortization does the reverse.
What changes the result the most
- Amortization term: the biggest lever on both the monthly payment and the balloon size.
- Balloon term: a longer balloon term means more payments and slightly more principal paid, shrinking the balloon a little.
- Interest rate: a higher rate raises the payment and slows principal paydown, leaving a larger balloon.
- Loan amount: scales everything proportionally - the balloon is always a percentage of the original principal.
Tips for handling a balloon loan
- Have an exit plan in writing - know whether you will sell, refinance, or pay cash, and when.
- Make extra principal payments if the loan allows it, to shrink the balloon before it is due.
- Watch interest-rate trends - if rates may rise, locking a refinance early can protect you.
- Build a reserve so a delayed sale or denied refinance does not push you into default.
- Check for prepayment penalties before counting on paying the balloon early.
Limitations and assumptions
- It assumes a fixed interest rate for the whole balloon term; it does not model adjustable rates.
- It does not include lender fees, points, closing or refinancing costs, which are paid separately.
- It assumes no extra principal payments; paying more would lower the balloon.
- It does not account for prepayment penalties or interest-only balloon structures, where no principal is paid before the balloon.
- Your actual terms depend on the lender, your credit, and the asset - treat this as a planning estimate.
How it compares to related calculators
This page answers "what is my payment and how big is the balloon?" For a different question, a sister tool fits better:
- For a fully amortizing loan with no balloon, use the Loan Calculator.
- For a car loan with trade-in and tax, use the Auto Loan Calculator or Car Payment Calculator.
- For unsecured borrowing over a set term, use the Personal Loan Calculator.
- To attack revolving debt, use the Credit Card Payoff Calculator or Debt Payoff Calculator.
⚠️ Common mistakes & edge cases
Confusing the balloon term with the amortization term
The amortization term only sizes the payment; the balloon term is when the loan actually ends. Mixing them up makes the loan look far cheaper than it is. The balloon is what remains after the shorter term.
Assuming refinancing is guaranteed
Many borrowers plan to "just refinance" the balloon, but approval depends on credit, income, asset value, and rates at that future date. If conditions worsen, you may not qualify - have a backup plan.
Underestimating how little principal you repay
Early payments are mostly interest, so after 5 years of a 30-year amortization you may still owe 90%+ of the loan. The balloon is almost the entire original balance, not a small remainder.
Ignoring an interest-only balloon
Some balloon loans are interest-only, meaning no principal is repaid before the balloon and the lump sum equals the full original loan. Confirm whether your loan amortizes at all during the term.
❓ Frequently asked questions
What is a balloon loan?
A balloon loan has small, regular monthly payments calculated as if the loan were spread over a long term (for example 30 years), but the entire remaining balance comes due as a single large 'balloon' payment at a much earlier date (for example after 5 or 7 years). You make affordable payments for the balloon term, then must pay off, refinance, or sell to cover the lump sum.
How is the balloon payment calculated?
First the monthly payment is computed with the standard amortization formula using the long amortization term: M = P x r x (1+r)^n / ((1+r)^n - 1), where n is the amortization months. Because only a few years of those payments are made, most of the principal is still outstanding. The balloon payment is simply the remaining loan balance at the end of the balloon term.
Why is the balloon payment so large?
Early loan payments are mostly interest, so very little principal is paid down in the first few years. When payments are sized for a 30-year payoff but the loan ends after 5 years, roughly 90% or more of the original principal can still be owed - that unpaid balance is the balloon.
What happens when the balloon comes due?
You have three main options: pay the lump sum from savings, refinance the remaining balance into a new loan, or sell the asset (such as a home or vehicle) and use the proceeds. If you cannot do any of these, you risk default, so a clear exit plan is essential before taking a balloon loan.
Are balloon loans a good idea?
They can suit borrowers who expect to sell or refinance before the balloon is due, or who want low payments short-term and have a reliable way to cover the lump sum. They are risky for anyone relying on uncertain future income, refinancing approval, or rising asset prices. The lower payment is a trade for a large, fixed obligation later.
Can I refinance a balloon payment?
Often yes, but it is not guaranteed. Refinancing depends on your credit, income, the asset's value, and prevailing interest rates at that time. If rates have risen or your finances have weakened, refinancing may be expensive or unavailable, which is the central risk of a balloon structure.
What is the difference between a balloon loan and a regular loan?
A fully amortizing loan is paid off completely by the final scheduled payment - no lump sum remains. A balloon loan uses the same monthly payment math but stops early, leaving a large unpaid balance due all at once. Balloon loans usually have lower monthly payments but a major one-time obligation that a standard loan does not.
Do balloon loans have lower monthly payments?
Yes. Because payments are calculated over a long amortization term (often 30 or 40 years) rather than the actual balloon term, the monthly amount is lower than a standard loan paid off over the balloon term. The trade-off is that you build little equity and owe a large balloon at the end.
Where are balloon loans common?
They appear in commercial real estate, some seller-financed home sales, certain auto and equipment loans, and short-term bridge financing. They are less common in standard consumer mortgages today because of consumer-protection rules, but they still exist in specific niches.
Does this calculator account for the balloon in the total cost?
Yes. The total paid figure adds every regular monthly payment over the balloon term plus the final balloon amount, so you see the full cash outlay - not just the small monthly number. It does not include lender fees, refinancing costs, or closing costs, which are separate.
💡 Good to know
The low payment is not the real cost
A balloon loan's monthly payment looks attractive because it is sized over a long amortization. The true cost is that payment plus the large balloon at the end. Always read both numbers together before deciding.
Plan your exit before you sign
Decide in advance how you will cover the balloon - sale, refinance, or cash - and stress-test that plan against higher rates or a slower market. A balloon loan without an exit plan is the most common way borrowers get into trouble.
Extra payments shrink the balloon
If your loan permits prepayments without penalty, paying a little extra each month reduces the balance and the size of the balloon you will owe. Even modest extra principal early on makes a meaningful difference.
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