Bridge Loan Interest Calculator
Estimate how much current-home equity a lender’s combined-LTV limit may leave available, then trace a requested bridge draw through monthly interest, upfront fees, payoff, expected selling costs, net home-sale proceeds, and a delayed-sale stress case.
Build the temporary financing path
The interest calculation assumes the full requested principal is outstanding for every entered month and uses simple monthly interest. A revolving line, staged draws, daily interest, minimum charges, compounding, extension fees, or principal payments require the lender’s actual schedule.
Five checkpoints across two closings
A lender-approved value, not an owner estimate, usually anchors the secured-equity limit.
First mortgage, HELOC, judgments, tax liens, and other secured claims consume availability.
Principal may be withheld for fees or disbursed to the next-home closing under controlled instructions.
Interest and dual housing costs continue until sale proceeds actually repay the temporary loan.
Selling costs, existing payoff, bridge payoff, prorations, repairs, and credits determine net cash.
Availability, interest, payoff, and net-sale formulas
CLTV-based availability equals current-home value multiplied by the entered maximum combined LTV, minus existing mortgages and liens, but not below zero. The calculator flags a requested bridge above that mechanical amount but does not approve a lower draw. Monthly interest equals requested principal multiplied by annual rate divided by 12. Expected interest multiplies that amount by expected months.
Origination charge equals requested principal multiplied by the entered percentage. Net advance subtracts origination and other closing costs from principal. If interest is accrued, modeled payoff equals principal plus expected interest; if interest is paid monthly, payoff equals principal and the result identifies the monthly cash requirement. Estimated sale cash equals sale price minus selling costs, existing liens, and bridge payoff. A paid-monthly case does not subtract previously paid interest again.
Worked $150,000 bridge example
A current home valued at $600,000 with $300,000 of existing liens has $180,000 of mechanical availability at an entered 80% combined-LTV ceiling: $480,000 permitted total liens minus $300,000 existing debt. The $150,000 requested bridge is $30,000 below that screen. Credit, income, program maximums, lien priority, property eligibility, and appraisal can still reduce or eliminate the offer.
At 9.5%, monthly simple interest on $150,000 is $1,187.50. Six months produces $7,125 of interest. A 2% origination charge is $3,000, and other entered costs are $1,500. Total temporary financing cost is $11,625. If fees are withheld, net bridge proceeds before interest are $145,500.
With accrued interest, bridge payoff after six months is $157,125. Selling the current home for $600,000 with 6% selling costs leaves $106,875 after $36,000 selling costs, the $300,000 existing liens, and bridge payoff. A nine-month delay raises interest to $10,687.50, adding $3,562.50 before extra taxes, insurance, utilities, maintenance, or extension charges.
Temporary financing still needs a durable repayment plan
Federal Regulation Z provisions cited below describe certain temporary bridge loans of 12 months or less in specific contexts, but a regulatory exemption does not make the debt risk-free or universally eligible. The lender can require ability to carry both homes, documented sale equity, reserves, a listed property, a short term, automatic repayment, or permanent financing approval.
Write the primary exit, backup exit, decision dates, and cash sources before closing. If sale activity is weak by the first review date, respond early through pricing, repairs, marketing, a different permanent loan, additional cash, or another approved plan. Waiting until maturity reduces choices.
The structure changes both cash flow and payoff
Monthly interest
The borrower pays interest during the bridge, preserving a lower principal payoff but adding a recurring obligation while often carrying two homes.
Accrued interest
Current cash flow is lower, but interest consumes sale equity at payoff. Confirm whether interest compounds and whether a reserve is withheld.
Closed-end second lien
A fixed principal advance may fund a down payment and close costs. It is secured behind an existing first mortgage and cannot normally be redrawn.
Bridge line or cross-collateral loan
Draw timing, multiple properties, lien release, borrowing base, minimum interest, and permanent financing can require a different schedule than this calculator.
Net sale equity is smaller than listing price minus mortgage
Reconcile commissions or brokerage compensation, transfer and recording charges, title and escrow costs, property tax and association prorations, seller credits, repairs, concessions, staging, moving, payoff fees, liens, bridge interest, and any prepayment charge. A price reduction can affect both net cash and appraisal expectations.
Use a realistic sale-to-close calendar. Preparation, listing, marketing, negotiation, inspection, financing, appraisal, title clearance, buyer contingencies, and closing each take time. A signed contract can still fail. Stress both a lower price and longer duration because they often occur together.
Add dual-home carrying costs outside the interest result
Bridge interest is only one incremental cost. Track principal and interest on both permanent mortgages, property taxes, homeowners insurance, mortgage insurance, association dues, utilities, security, landscaping, maintenance, repairs, cleaning, travel, and vacancy. Some costs continue after move-out until legal transfer.
Build a monthly cash table rather than a single total. Identify the lowest cash point after the next-home down payment and closing costs, the bridge proceeds, recurring obligations, expected sale date, and final payoff. Preserve an emergency reserve that is not entirely consumed by the planned transaction.
Due diligence before accepting the bridge
Request the note, security instrument, Loan Estimate or applicable disclosure, fee worksheet, appraisal requirements, lien position, draw rules, interest method, maturity, extension option, default rate, late fees, prepayment terms, payoff process, and conditions for releasing collateral. Confirm whether fees are paid in cash, withheld, or financed.
Compare alternatives such as a sale contingency, delayed closing, rent-back, HELOC, home equity loan, securities-backed credit, gift, lower down payment, recast, or selling first. Each has different cost, market, tax, liquidity, collateral, and qualification risk. Compare complete transaction outcomes rather than only the bridge rate.
Also coordinate both closing teams. Confirm how the bridge lien appears in title searches, which settlement agent receives payoff instructions, whether the current first-lien lender must consent, how unused proceeds are handled, and when the new-home lender re-verifies debt and assets. A transaction can be mathematically funded yet fail because documents, wires, lien releases, or underwriting conditions are sequenced incorrectly.
Interest and fees do not receive automatic tax treatment
Deductibility can depend on how proceeds are used, which property secures the debt, acquisition indebtedness rules, investment or business purpose, capitalization, points, tracing, itemizing, income limits, and state law. Selling costs and basis follow separate rules. Preserve the settlement documents and use current professional advice.
It does not trace bridge proceeds, deduct interest, capitalize fees, calculate home-sale exclusion, or determine basis.
Frequently asked questions
How is bridge-loan interest calculated here?
Requested principal multiplied by annual rate divided by 12, then multiplied by months outstanding. The full draw is assumed outstanding throughout.
What is the combined-LTV availability?
Entered home value times the selected CLTV limit minus existing liens. It is a mechanical ceiling, not a lender commitment or appraisal.
Is accrued interest free until sale?
No. It is added to payoff and consumes sale equity. The agreement may also compound interest, reserve funds, or charge extensions.
Does net sale cash include the next home’s mortgage?
No. It only bridges the current-home sale proceeds shown. The next-home down payment, closing costs, permanent mortgage, and ongoing payment need a separate ledger.
What if the home sells below the estimate?
Lower the sale-price input and extend the stress months. Confirm the bridge can be repaid and the next transaction remains funded without assuming extra credit.
Model limitation: One full-draw, simple-interest bridge secured against an estimated current-home value. It does not model staged draws, compounding, daily accrual, interest reserves, extensions, multiple collateral releases, appraisal, qualification, permanent financing, liens not entered, exact sale prorations, tax, default, or a lender offer.
If the bridge note requires monthly interest-only payments, verify the cash-flow figure with the interest-only loan payment calculator.
References
- Consumer Financial Protection Bureau — Regulation Z minimum standards and temporary bridge-loan provision
- Consumer Financial Protection Bureau — temporary financing interpretation with bridge-loan example
- Consumer Financial Protection Bureau — second mortgage and junior-lien explanation
- Consumer Financial Protection Bureau — Closing Disclosure explainer