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Buy Before Sell Bridge Loan Calculator

Estimate the true cost of bridge financing when buying a new home before selling your current one.

Quick answer: Estimate bridge-loan interest and signed equity using a user-entered bridge rate, timing, sale proceeds, and transaction costs. Enter Bridge Loan Amount, Bridge Loan Interest Rate, Expected Bridge Period (Months), and Equity in Current Home to personalize the estimate. It returns Total Bridge Loan Cost, Monthly Bridge Loan Interest, and Signed Equity After Bridge Principal and Interest so you can compare the impact before choosing a next step. Use it to compare payment, equity, rate, and timing tradeoffs before applying or changing a loan.

SWReviewed by SwitchWize Research Desk · Last reviewed July 20, 2026
Total Bridge Loan Cost
$6,000
Total Bridge Loan Cost
$6,000
Monthly Bridge Loan Interest
$1,500
Signed Equity After Bridge Principal and Interest
$44,000
Diagnostic

Over 4 months, this bridge loan costs about $6,000 in interest.

After repaying bridge principal and modeled interest, signed remaining equity is $44,000.

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What to do next

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Your action plan
  1. 1

    Set the target and timeline for this plan

    Estimate bridge-loan interest and signed equity using a user-entered bridge rate, timing, sale proceeds, and transaction costs.

  2. 2

    Pressure-test one alternate scenario before deciding

    Assumptions change the answer, especially when rates, taxes, or timing matter.

  3. 3

    Save the result to Money Map or use the linked next action

    Turn the result into a prioritized action instead of treating it as a one-off number.

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This is an educational estimate, not tax, legal, investment, or lending advice. Tax rules, rates, and eligibility change and depend on your full situation. Confirm with a qualified professional or the provider before acting.

Calculator action path

Turn this result into a decision

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About mortgage rates

Mortgage rates depend on loan type (30-yr fixed, 15-yr fixed, ARM, FHA, VA, jumbo), your credit score, down payment, points paid, loan amount, property state, and whether you're purchasing or refinancing. The calculator above uses a representative market rate for payment estimates, your actual rate will vary.

For a personalized rate comparison, use the tool below to see lenders ranked by APR, loan type, and your profile.

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Mortgage rates shown on SwitchWize compare pages include loan type, assumed FICO, LTV, and points. Representative only. Verify all terms directly with the lender. Advertising disclosure

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Frequently Asked Questions

Everything you need to know.

What does an example Buy Before Sell Bridge Calculator calculation look like?
Using this calculator's own default assumptions, a bridge loan amount of $200,000, bridge loan interest rate of 9% and expected bridge period (months) of 4 produces an estimated total bridge loan cost of $6,000 and monthly bridge loan interest of $1,500. Enter your own numbers above to see how it changes for your situation.
What happens to my equity when I take out a bridge loan?
Your equity is temporarily reduced by the bridge loan amount itself, and further reduced by the interest that accrues each month you carry it. Once you sell your current home and pay off the bridge, your remaining equity depends on your sale proceeds minus the total bridge costs you've paid.
Should I take a bridge loan or wait to sell first?
A bridge loan lets you move quickly and avoid losing a home you love, but it costs money in interest for every month it's outstanding. The trade-off is speed and certainty versus the monthly interest expense; longer bridge periods amplify that cost, so the decision depends on how quickly you expect to sell and whether the convenience justifies the accumulating interest.
Is the Buy Before Sell Bridge Loan Calculator free to use?
Yes. SwitchWize calculators are free, and you do not need an account to run scenarios or view the result.
Does using the Buy Before Sell Bridge Loan Calculator affect my credit score?
No. Using a calculator does not trigger a credit check. A credit impact can occur only if you apply directly with a lender, card issuer, or provider.
Are the results personalized financial advice?
No. Calculator outputs are educational estimates based on the inputs you enter. Review assumptions and confirm terms directly with providers before making a financial decision.
What should I do after seeing the result?
Use the recommendation module on this page to compare mortgage lenders, or run Money Map to compare this home & mortgage decision with your other opportunities.
How does SwitchWize choose related offers?
Related offers are matched by the calculator surface (mortgage) and ranked using SwitchWize data such as rate, fees, trust signals, product fit, and switching friction. Paid relationships do not change organic ranking order.
How fresh are the rates and offers shown?
Rate and offer data is reviewed on a recurring cadence and every offer module shows review context or links to the methodology and disclosure pages.
Where can I see the ranking methodology?
The SwitchWize methodology page explains how rate freshness, editorial review, affiliate disclosure, and category ranking factors work.
Can Money Map use this result?
Yes. Money Map is the broader diagnostic path: it compares savings, mortgage, cards, and debt so you can see whether this calculator result is your highest-impact next move.

Why This Matters

Bridge loans let you purchase your next home without waiting for your current one to sell, but they carry interest costs that stack on top of your existing mortgage. Understanding the monthly interest expense and total bridge cost helps you decide whether the convenience is worth the expense, and how much equity you'll have available after the bridge principal and interest are repaid. The longer your bridge period, the more interest accumulates, which directly reduces the net proceeds you walk away with.

How to Use It

  1. 1Enter the amount you plan to borrow through the bridge loan.
  2. 2Input the interest rate your lender quoted for the bridge loan.
  3. 3Specify how many months you expect to carry both mortgages before your current home sells.
  4. 4Enter your current equity in your home.
  5. 5Review the monthly interest charge, total interest cost over the bridge period, and your signed equity after bridge costs are deducted.
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