LOANS & DEBT
Bridge Loan Calculator — Real Estate Bridge Financing Cost
By Worldtickers ·
Calculate the monthly interest-only payment, points cost, and total cost of a short-term bridge loan — the financing tool used to buy your next home before your current one sells.
This bridge loan calculator — real estate bridge financing cost tool focuses on calculating the monthly interest-only payment, points cost, and total cost of a short-term bridge loan — the financing tool used to buy your next home before your current one sells. Use it to compare borrowing costs, monthly payments, interest charges, payoff timelines, and refinance or repayment choices by changing the rate, term, balance, and payment assumptions.
Bridge Loan Calculator
Bridge Loan Calculator
Bridge loans are almost always interest-only. Enter the loan amount, annual rate, term in months, and any points or origination fee to see your monthly payment and the total cost of the financing.
What Is a Bridge Loan?
A bridge loan — also called bridge financing or a swing loan — is a short-term loan, typically lasting anywhere from 6 to 12 months, used to cover a temporary gap in financing. The most common real estate use case is straightforward: you've found your next home, but your current home hasn't sold yet, and you don't want to lose the new property to a buyer who can move faster. A bridge loan lets you tap the equity in your current home to fund the purchase of the new one now, with the loan repaid — usually in full, in one shot — once your old home actually sells.
Because they're fast, short-term, and carry more lender risk than a conventional mortgage, bridge loans typically come with a meaningfully higher interest rate and often an upfront points fee (1-2 points is common) on top of that rate. Most are interest-only: your monthly payment covers just the interest, with the entire principal balance due as a single payment — often described as balloon-style — when the loan is repaid. Our balloon payment calculator covers that lump-sum-at-maturity mechanic in more depth for loans generally.
The trade-off is clear: a bridge loan can be the difference between winning your next home and losing it to a faster buyer, but it adds real financing cost on top of whatever you're already paying for your current mortgage — meaning for a period of time, you may effectively be carrying two housing payments at once. This calculator helps you see exactly what that added cost looks like in dollars.
How to Use This Calculator
Four inputs drive the whole calculation.
Bridge Loan Amount
Enter how much you need to borrow. This is typically sized around the equity available in your current home, minus what's needed to cover your new down payment, closing costs, and a reasonable buffer.
Annual Interest Rate
Bridge loan rates run higher than standard mortgage rates — often several percentage points above what you'd get on a conventional 30-year mortgage at the same time, reflecting the short duration and added lender risk. Get an actual quote from a lender rather than assuming a rate, since bridge loan pricing varies more between lenders than conventional mortgage pricing does.
Loan Term (Months)
Most bridge loans run 6 to 12 months, matched to a realistic estimate of how long it will take to sell your current home in your local market. Enter your expected term in months.
Points / Origination Fee
Enter the points charged as a percentage of the loan amount — one point equals 1% of the loan. This is an upfront cost, separate from and in addition to your monthly interest payments.
The Formula Explained
Since most bridge loans are interest-only, the Monthly Payment = Loan Amount × Monthly Interest Rate, where the monthly rate is the annual rate ÷ 12 ÷ 100. No portion of this payment reduces the principal — the balance you started with is the same balance you owe on the last day of the term.
Points Cost = Loan Amount × Points%, charged once, upfront, at closing.
Total Cost of the Bridge Loan = (Monthly Payment × Term in Months) + Points Cost.This is the all-in dollar cost of the financing — every interest payment you'll make over the full term, plus the origination fee — not including the principal itself, since that principal is simply repaid (not "spent") when your old home sells.
Worked example: a $150,000 bridge loan at 9% annual interest, for a 9-month term, with 2 points. Monthly rate = 9 ÷ 12 ÷ 100 = 0.0075. Monthly Payment = $150,000 × 0.0075 = $1,125. Points Cost = $150,000 × 2% = $3,000. Total Cost = ($1,125 × 9) + $3,000 = $10,125 + $3,000 = $13,125.
Real-World Examples
Example 1: Buying Before Selling in a Balanced Market
You need $150,000 to bridge the gap on your next home purchase. Your lender offers 9% interest, a 9-month term, and 2 points. As shown above, your monthly interest-only payment is $1,125, points cost $3,000 upfront, and the total cost of the bridge loan over its full term is $13,125. If your old home sells in month 6 instead of month 9, you'd simply repay the $150,000 principal early and only owe interest for the months you actually used — six payments of $1,125 ($6,750) plus the same $3,000 in points, for a total of $9,750. That's roughly $3,375 less than the full 9-month term would have cost, simply because you didn't need the loan as long as planned.
Example 2: A Larger Loan, Shorter Term, Fewer Points
You need a larger $250,000 bridge loan, but your lender quotes a higher 10.5% rate for a shorter 6-month term, with 1.5 points. Monthly rate = 10.5 ÷ 12 ÷ 100 = 0.00875. Monthly Payment = $250,000 × 0.00875 = $2,187.50. Points Cost = $250,000 × 1.5% = $3,750. Total Cost = ($2,187.50 × 6) + $3,750 = $13,125 + $3,750 = $16,875. Notice this loan is larger but has a shorter term, and it still costs more in total than Example 1 — a reminder that a bigger loan amount and a higher rate both push total cost up even when the term is shorter.
Tips and Limitations
Budget for Carrying Two Housing Payments
While your bridge loan is outstanding, you may be paying your bridge loan's interest, your new mortgage, and your old mortgage all at the same time, if your old home hasn't sold yet. Make sure you can genuinely afford this overlap for the full loan term before committing, not just for a best-case, fastest-possible sale timeline.
Get Real Quotes — Bridge Loan Pricing Varies Widely
Unlike conventional mortgages, where rates cluster fairly closely across lenders, bridge loan rates, points, and terms vary considerably from one lender to the next. Shop multiple lenders and compare total cost (not just the rate) using the formula above before choosing one.
Understand How Your Loan Repays the Principal
Confirm whether your specific bridge loan is truly interest-only with a lump-sum principal payoff at the end, or whether it defers all payments (interest included) to the payoff date. The math differs meaningfully between the two structures, and this calculator models the more common interest-only-with-monthly-payments version.
Have a Backup Plan If Your Home Doesn't Sell in Time
Ask your lender what happens if you reach the end of the term without a sale — whether an extension is available, at what cost, and under what conditions. Going in with a clear answer to this question is far better than discovering it under time pressure. For the mortgage on your new purchase itself, see our mortgage calculator.
Frequently Asked Questions
What is a bridge loan?
A bridge loan is a short-term loan, usually lasting 6 to 12 months, designed to "bridge" a temporary financing gap — most commonly, the gap between buying a new home and selling your current one. It lets you access the equity tied up in your existing home before that home actually sells, so you can make a competitive, non-contingent offer on a new property rather than waiting for your sale to close first. Bridge loans are also used in commercial real estate and business financing for similar short-term gap situations.
Why are bridge loan interest rates so much higher than a regular mortgage?
Bridge loans carry meaningfully higher rates — often several percentage points above a standard mortgage — because they're short-term, higher-risk products for the lender. The loan is typically underwritten quickly, sometimes with less rigorous documentation than a full mortgage, and the lender is taking on the risk that your current home might take longer to sell than expected. Lenders price that added risk and shorter earning window into a higher rate and often upfront points as well.
How do bridge loan payments actually work?
Most bridge loans are interest-only, meaning your monthly payment covers just the interest accruing on the loan — none of it reduces the principal balance. The full principal amount is then repaid in one lump sum, typically when your current home sells and you use the sale proceeds to pay off the bridge loan in full. Some bridge loans instead defer all payments to the payoff date rather than requiring monthly interest payments; always confirm which structure your specific loan uses.
What are points on a bridge loan?
Points are an upfront fee charged by the lender, expressed as a percentage of the loan amount — one point equals 1% of the loan. A $200,000 bridge loan with 2 points costs $4,000 upfront, in addition to the monthly interest payments. Points compensate the lender for originating a short-term, faster-turnaround loan and are typically higher on bridge loans than on conventional mortgages, reflecting the added risk and administrative cost of the product.
What happens if my current home doesn't sell before the bridge loan term ends?
This is the central risk of bridge financing. If your home hasn't sold by the time the bridge loan matures, you may need to extend the loan (often at additional cost and lender discretion), refinance it into a longer-term loan, or in a worst case, be forced to sell your current home more quickly and at a lower price than you'd like just to pay off the bridge loan. Before taking on a bridge loan, it's worth having a realistic view of your local market's typical days-on-market and a backup plan if your sale takes longer than expected.
Is a bridge loan the same thing as a balloon payment?
They're closely related but not identical. A bridge loan is defined by its short-term, gap-financing purpose; a balloon payment describes the loan structure where a large lump sum comes due at maturity. Most bridge loans effectively work like a balloon structure, since the full principal is due in one payment when the term ends (usually funded by your home sale) rather than being paid down gradually. Our balloon payment calculator (linked below) covers how that lump-sum mechanic is calculated in general, for loans of any kind.
Are there alternatives to a bridge loan for buying before selling?
Yes — a home equity line of credit (HELOC) on your current home, a contingent offer (making your new home purchase conditional on your current home selling), a rent-back or leaseback arrangement with your buyer, or simply timing your sale and purchase closings to happen close together are all common alternatives. Each has different costs, risks, and timing flexibility compared to a bridge loan, so it's worth comparing more than one option rather than assuming a bridge loan is the only path.