Bridge Loan Calculator
A bridge loan is short‑term, usually interest‑only, with the full balance repaid as a balloon when you sell or refinance. The payment is loan × rate ÷ 12. This calculator gives the interest‑only payment, the balloon payoff, your LTV and the equity at the end.
Use this bridge loan calculator to size up short‑term financing that lets you buy before you sell. Enter the property price, your down payment, the rate and the balloon term — it returns the interest‑only payment, an amortizing option, the balloon amount, your loan‑to‑value, and your projected equity when the loan comes due.
Enter the property, down payment, rate and balloon term, then press Calculate.
How the bridge loan calculator works
A bridge loan is built for speed and timing, not for slowly paying down principal. This calculator reflects that. It takes your loan amount — the property price minus your down payment or equity — and computes the interest‑only payment as loan times rate divided by twelve, since most bridge loans require only interest during the short term. The principal does not shrink, so the balloon payment at the end equals the full loan (or slightly less if you choose the amortizing option shown). On top of that, it projects your property's value and equity at payoff using your appreciation estimate, and the loan‑to‑value you would carry into a refinance.
Seeing the balloon and the equity together is the point: the monthly cost is modest, but the whole loan is due at the end, and your ability to repay depends on selling or refinancing. Bridge loans sit between low‑cost home equity loans and pricier hard money loans, and share the balloon structure of a balloon loan.
How the bridge loan is calculated
- Loan — property price − down payment
- Origination fee — loan × fee%
- Projected value — price × (1 + appreciation)years
The exit is everything
A bridge loan is a calculated bet that your exit will arrive on time. The three ways out are to sell the property you are moving from, refinance the bridge into a long‑term loan, or pay the balloon from cash. Each depends on things you do not fully control — a buyer, a lender, market values. That is why lenders underwrite bridge loans on the property and your equity more than your income, and why you should too. Before signing, be honest about how quickly your old property will sell and whether you would qualify to refinance if it does not.
Count the full carrying cost
The interest‑only payment is not the whole story. For the bridge period you may be carrying two properties — two sets of taxes, insurance and upkeep — plus the origination fee and closing costs on the bridge itself. Those add up quickly on a short, higher‑rate loan. Make sure you have the reserves to carry both for longer than you expect, because sales slip and refinances take time. Used with a solid exit and a cash cushion, a bridge loan is a powerful timing tool; used without them, it is a fast way into trouble.
Bridge loan, swing loan, or HELOC?
Shopping for financing to buy before you sell, you will meet three names for overlapping ideas. A swing loan is simply another term for a bridge loan — the two are the same short-term product that lets you swing from your old home to your new one, and lenders use the words interchangeably. A HELOC, or home equity line of credit, is a genuine alternative: you draw on the equity in your current home to fund the new purchase. A HELOC is usually cheaper and more flexible, but it has drawbacks for this job — you generally must open it before you list, since lenders are reluctant once the home is on the market, it carries a variable rate, and you still have to qualify while carrying two housing payments. A bridge or swing loan is purpose-built for the transition and can close fast, at a higher cost. If you have ample equity and plan ahead, a HELOC can be the cheaper route; if you need speed and simplicity, the bridge loan earns its premium.
Estimate only — not a loan offer or financial advice. Appreciation is an assumption, not a guarantee, and values can fall. Bridge loans carry real risk if your exit is delayed; confirm terms with your lender.
How to use it & key terms
Enter the property price, down payment, expected appreciation, the interest rate, the balloon term and the origination fee, then press Calculate to see the payment, balloon, LTV and equity.
| Term | What it means |
|---|---|
| Bridge loan | Short-term financing that bridges a purchase and a sale or refinance. |
| Interest-only | Paying only interest, so the full loan is the balloon. |
| Balloon | The lump sum repaid when the short term ends. |
| LTV | Loan-to-value — the loan as a percentage of the value. |
| Origination fee | An upfront lender fee, often 1%–3% of the loan. |
| Exit strategy | Selling or refinancing to repay the balloon. |
Sources & methodology
The calculator sets the loan as the property price minus the down payment. The interest‑only payment is the loan times the annual rate divided by twelve, and for an interest‑only bridge the balloon equals the full loan at the end of the term. The amortizing option uses the standard fixed‑rate formula over a 30‑year schedule and computes the balloon as the remaining balance after the term. The origination fee is the loan times the entered percentage. Projected value applies your annual appreciation over the term, and equity is the projected value minus the balance owed. Appreciation is an assumption and can be negative in a falling market.
Sources: Standard interest‑only and fixed‑rate amortization formulas; typical bridge loan terms (6–36 months) and rates (8%–12%) per commercial lending guidance.
How a bridge loan's value shifts with the market
A bridge loan exists to solve one awkward problem: you have found the home you want to buy, but your money is still tied up in the home you need to sell. It lets you borrow against the equity in your current property to fund the new purchase, then repay it when the old home sells. How useful — and how risky — that bridge turns out to be depends heavily on the market you are selling into, which is the part many borrowers underweight.
In a fast-moving seller's market, a bridge loan is at its most powerful. Homes sell quickly, so the overlap period where you carry both properties is likely to be short, and the interest cost stays contained. Just as important, the bridge frees you to make an offer that is not contingent on selling your current home first. In competitive bidding, a clean, non-contingent offer often stands out, and being able to move once — rather than selling, renting, and buying again — removes a great deal of stress and expense.
In a slower market, the same loan carries more risk, and the carrying-cost figure becomes the number to watch. If your existing home takes months longer to sell than you hoped, you may be paying the bridge loan, the new mortgage, and the old home's running costs all at once. The exit you were counting on stretches out, and a tool that looked cheap over two months can become expensive over eight. Nothing about the loan changed — only how long you are exposed to it.
The practical takeaway is to size the decision against a realistic, not optimistic, selling timeline. Ask how many months you could comfortably carry both properties, and compare that honestly with how long homes like yours are actually taking to sell. If there is comfortable margin, a bridge loan can be an elegant way to move on your own terms. If the margin is thin, it is worth pricing the slower scenario in full and considering whether a contingent sale or another structure would let you sleep better.
Frequently asked questions
What is a bridge loan?
A bridge loan is short-term financing that bridges the gap between buying a new property and selling or refinancing an existing one. Terms usually run six months to three years, payments are often interest-only, and the full balance is repaid in a balloon when you sell or refinance. Rates are higher than a standard mortgage to reflect the short term and speed.
How is a bridge loan payment calculated?
Most bridge loans are interest-only, so the monthly payment is simply the loan amount times the rate divided by twelve. The principal is not paid down during the term; the whole loan comes due as a balloon at the end. This calculator also shows an amortizing payment option, in which case the balloon is a little smaller.
How are bridge loans repaid?
With a lump-sum balloon payment when the term ends. The usual sources are the proceeds from selling your old property or a new long-term loan that refinances the bridge. Because repayment depends on that exit, lenders focus on your plan and the value of the property rather than only your income.
Are bridge loan rates high?
Higher than a conventional mortgage but usually lower than hard money. Bridge loan rates commonly fall in the high single digits to low double digits, reflecting the short term, fast approval and higher risk. The convenience and speed are the trade-off for the added cost, which is manageable because the term is short.
When does a bridge loan make sense?
When timing forces your hand — you need to buy before you sell, or seize a property quickly before slow conventional financing can close. Homeowners use bridge loans to buy a new home without a sale contingency; businesses use them to acquire or renovate property. They work only with a clear, near-term exit through a sale or refinance.
What are the risks of a bridge loan?
The main risk is that your exit does not happen on time: if your old property does not sell or you cannot refinance before the balloon is due, you face a large payment with no obvious source. Carrying two properties also strains cash flow. Bridge loans suit borrowers with equity, reserves and a realistic sale or refinance timeline.
What is a swing loan?
A swing loan is just another name for a bridge loan. It is short-term financing that lets you swing from your current home to a new one, borrowing against the equity or value you hold now so you can buy before your old property sells. Like any bridge loan, it is usually interest-only with a balloon repaid from the sale or a refinance, carries a higher rate than a standard mortgage, and is meant to be paid off quickly. If a lender offers you a swing loan, treat it exactly as you would a bridge loan.
What do you need to qualify for a bridge loan?
Lenders lean on equity and your exit plan more than on income. You generally need substantial equity in the property you are borrowing against, often 20% or more, a credible way out such as a home already under contract or a firm refinance plan, and reasonable credit, though requirements vary by lender. Because the loan is short and secured by real estate, underwriting is faster and more asset-focused than a normal mortgage, but a weak or vague exit is the fastest way to be turned down.
What are the alternatives to a bridge loan?
If you would rather not use a bridge loan, common alternatives include a home equity line of credit or home equity loan opened before you list, a cash-out refinance, a contingent offer that depends on selling your current home first, or simply selling before you buy and renting in between. Each trades speed for cost or certainty: a HELOC is usually cheaper but must be set up while you still own the home, while a contingent offer avoids extra borrowing but is weaker in a competitive market. Compare the total cost and the risk of each against a bridge loan before you decide.