Balloon Mortgage Calculator
Balloon Mortgage Calculator
The amount you are borrowing, not including down payment
Number of years until the balloon payment is due
The period used to calculate monthly payments (must be longer than balloon term)
Optional — LTV Calculation
Used to calculate Loan-to-Value ratio
Enter Your Loan Details
Fill in the loan amount, interest rate, balloon term, and amortization period above to see your monthly payment, balloon balance, payment breakdown chart, and full amortization schedule.
Important
This calculator is provided for general information only and is not financial, tax, or legal advice. Results are estimates and do not reflect your full circumstances, current rates, fees, or eligibility rules. Speak to a qualified professional before making a financial decision.
Monthly payment, balloon balance, and full amortization schedule
A balloon mortgage is a short-term home loan where monthly payments are calculated based on a longer amortization period — typically 30 years — but the entire remaining balance becomes due at the end of a much shorter term, usually 5 to 7 years. That final lump-sum payment is called the balloon payment, and it can be substantially larger than any individual monthly payment you made during the loan's life. Balloon mortgages were originally developed for commercial real estate transactions and have since found use in residential lending, particularly for buyers who plan to sell the home, refinance into a conventional mortgage, or receive a large income boost before the balloon comes due. Because the monthly payment is amortized over a longer period, it is typically lower than the equivalent fully-amortizing 30-year fixed mortgage at the same rate, making these loans attractive for borrowers focused on near-term cash flow. The most common balloon mortgage structures are the 5/30 (payments amortized over 30 years, balloon due after 5), the 7/30 (balloon at year 7), and the 3/15 (balloon due after 3 years, amortized over 15). Lenders sometimes advertise these products for borrowers who expect to move within five to seven years, allowing them to enjoy lower monthly payments without ever encountering the balloon event. However, balloon mortgages carry significant risk. If property values decline, the borrower may be unable to refinance — particularly if the remaining loan balance exceeds the home's current market value. Rising interest rates between origination and balloon maturity can make refinancing more expensive or even unaffordable. Borrowers who cannot make the balloon payment and cannot sell or refinance face default. For this reason, balloon mortgages largely disappeared from the residential market after the 2008 financial crisis and remain far more common in commercial real estate today. This calculator computes the exact monthly payment, the balloon payment remaining at term end, cumulative interest paid, and the total cost of the loan. It also provides a side-by-side comparison with a traditional fully-amortizing 30-year mortgage at the same rate and loan amount, so you can see exactly how much you save each month — and how much more total interest you might pay if you keep the traditional loan to term. The payment breakdown donut chart splits your total outflows into principal paid, interest paid, and balloon payment, giving you an immediate visual sense of how your money is allocated. The amortization schedule table shows every monthly payment from origination through the balloon date, with the final balloon row clearly flagged. You can export the full schedule to CSV for use in a spreadsheet or share with a lender, financial advisor, or tax professional. Use this calculator when comparing loan offers, modeling different balloon term lengths, or deciding whether a balloon mortgage makes sense given your expected holding period. Always pair calculator results with advice from a licensed mortgage professional before committing to any loan product.
Understanding Balloon Mortgages
What Is a Balloon Mortgage?
A balloon mortgage is a loan with payments structured as if it amortizes over a long period (commonly 30 years), but with the full remaining balance — called the balloon payment — due at the end of a much shorter term, typically 3, 5, 7, or 10 years. The loan does not fully pay down the principal during the shorter term, so a large lump sum remains outstanding. This structure is distinguished from a fully-amortizing loan, where every payment gradually reduces the principal to zero by the final scheduled payment. Balloon mortgages are common in commercial real estate financing and are also used in residential markets for specific borrower profiles, such as those confident they will sell or refinance before the balloon date.
How Is the Balloon Payment Calculated?
The monthly payment M is computed using the standard annuity formula based on the full amortization period, not the shorter balloon term: M = P × r(1+r)^n / ((1+r)^n − 1), where P is the principal, r is the monthly interest rate (annual rate ÷ 12), and n is the total amortization months. The balloon payment B is the outstanding principal balance after t balloon payments: B = P(1+r)^t − M × ((1+r)^t − 1) / r. Because the loan is only partially paid down, the balloon balance is typically very close to the original loan amount — especially in the first 5 to 7 years when most of each payment is interest. This calculator applies these formulas exactly and builds the full month-by-month amortization schedule.
Why Does the Balloon Term Matter?
The balloon term determines both how long you have before the lump sum is due and how much of the principal remains. A 3-year balloon on a $300,000 loan at 6.5% leaves approximately $285,000 outstanding — more than 95% of the original balance. A 7-year balloon leaves around $270,000. Neither substantially reduces the principal compared to a 30-year full payoff. The shorter the balloon term, the less equity you accumulate through amortization, which can affect refinancing options. Conversely, a longer balloon term like 10 years gives you more time to build equity and reduces refinance risk. Choosing the right balloon term requires accurately estimating your holding period and future income or property value.
Risks and Limitations
Balloon mortgages carry several material risks that borrowers must understand. First, refinancing risk: if interest rates rise significantly or your credit score drops before the balloon date, you may not qualify for a new loan on affordable terms. Second, collateral risk: if your home's value falls below the outstanding balloon balance, you may be underwater and unable to sell or refinance. Third, income risk: if your financial situation deteriorates, the lump-sum payment may be unaffordable. This calculator provides mathematical results assuming all payments are made on time and the balloon payment is met in full. It does not model prepayment scenarios, origination fees, private mortgage insurance, property taxes, or homeowner's insurance, all of which affect the true cost of homeownership.
How to Use the Balloon Mortgage Calculator
Select a Quick Preset or Enter Loan Details
Click a quick-preset chip (5/30, 7/30, or 3/15) to pre-fill the balloon term and amortization period for the most common balloon mortgage structures. Then enter your loan amount and annual interest rate. These four inputs are all you need for an immediate calculation.
Review the Monthly Payment and Balloon Balance
The hero result shows your fixed monthly principal-and-interest payment. The highlight cards below show the balloon payment due at term end, total interest paid over the balloon period, total cost, and how much principal you will have paid down. This tells you immediately how much you must refinance, sell, or pay in cash when the balloon comes due.
Study the Payment Breakdown Chart and Balance Graph
The donut chart splits your total outflows into three segments: principal paid, interest paid, and balloon payment. The line graph shows your remaining balance declining from the loan amount to the balloon payment. Notice how flat the decline is — most of your balance persists through the short balloon term, which is why balloon mortgages require refinancing or a sale.
Compare with a Traditional Mortgage and Export the Schedule
The comparison card shows how your balloon monthly payment and total interest compare to a fully-amortizing 30-year mortgage at the same rate. Expand the amortization schedule to see every monthly payment through the balloon date, then export to CSV if you need the data for a spreadsheet or lender discussion.
Frequently Asked Questions
What is a balloon mortgage and how does it differ from a fixed-rate mortgage?
A balloon mortgage calculates monthly payments as if the loan amortizes over a long period — usually 30 years — but requires the entire remaining balance to be paid in a single lump sum at the end of a shorter term, typically 5 to 7 years. A fixed-rate mortgage, by contrast, fully amortizes over its stated term so that the final scheduled payment brings the balance to exactly zero. Because a balloon loan's monthly payment is based on a longer amortization, it is lower than an equivalent fully-amortizing payment. However, you must refinance, sell the property, or pay the balloon balance in cash when it comes due, making this loan suitable only for borrowers with a clear exit strategy.
How is the balloon payment amount calculated?
The balloon payment is the outstanding principal balance after all scheduled payments through the balloon term have been applied. The formula is B = P(1+r)^t − M × ((1+r)^t − 1)/r, where P is the original principal, r is the monthly interest rate (annual rate ÷ 12), t is the number of monthly payments in the balloon term, and M is the monthly payment calculated from the full amortization period. Because early payments are heavily weighted toward interest, only a small fraction of the principal is paid down during a 5- to 7-year balloon term, so the balloon balance is typically 90–96% of the original loan amount.
What are the most common balloon mortgage structures?
The three most widely used structures are the 5/30 (monthly payments based on 30-year amortization, balloon due after 5 years), the 7/30 (balloon at year 7), and the 3/15 (balloon at year 3, amortized over 15 years). Lenders describe these with shorthand notation where the first number is the balloon term and the second is the amortization period. Commercial real estate lenders also use 3/25, 5/25, and 10/30 structures. The 7/30 is the most common residential variant because it aligns with the median homeownership tenure in the United States, giving borrowers a reasonable probability of selling before the balloon date.
What options do I have when the balloon payment comes due?
You have four main options when a balloon matures. First, refinance into a new fixed-rate or adjustable-rate mortgage — the most common strategy, though it depends on your credit score, income, current rates, and property value. Second, sell the property and use the proceeds to pay off the balloon balance. Third, if your lender offers a balloon reset or conversion provision, you may be able to extend the loan at the current market rate without a full refinance. Fourth, if you have accumulated sufficient savings or received a windfall, you can pay off the balloon in cash. Always have your exit strategy confirmed before closing on a balloon mortgage.
Are balloon mortgages still available for residential home purchases?
Balloon mortgages are far less common in residential lending today than they were before the 2008 financial crisis, when many borrowers were unable to refinance after property values collapsed. Dodd-Frank mortgage regulations introduced the Qualified Mortgage standard, which effectively excludes most balloon loans from safe-harbor protections, making large lenders reluctant to originate them. However, balloon mortgages are still offered by some community banks, credit unions, portfolio lenders, and in seller-financed transactions. They remain prevalent in commercial real estate, construction lending, and bridge financing. Borrowers should consult a HUD-approved housing counselor before accepting a balloon loan on a primary residence.
Does a lower monthly payment mean I save money with a balloon mortgage?
Not necessarily. While a balloon mortgage delivers a lower monthly payment than a fully-amortizing loan at the same rate, the true comparison depends on your actual holding period. If you sell or refinance before the balloon date, you pay less total interest than a 30-year fixed and benefit from the lower monthly cost. However, if you refinance at a higher interest rate, the long-run total cost may exceed that of the original 30-year loan. The comparison card in this calculator shows the monthly payment difference and total interest difference between your balloon loan and a traditional 30-year mortgage at the same rate, which helps you evaluate whether the balloon structure is cost-effective for your expected timeline.