Second mortgage
Estimate the payment on a fixed-rate second mortgage.
This page helps you estimate the added monthly cost of a second lien and think through when a second mortgage makes sense relative to preserving an existing first mortgage.
Best fit
Useful when you want a rough payment estimate.
This tool is best for fixed-rate second-mortgage planning, not variable-rate HELOC pricing.
What to compare
Look at the full monthly stack.
A second mortgage only makes sense if the combined payment, reserves, and purpose of the cash all fit your plan.
Estimated second-mortgage payment
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Combined payment with first mortgage
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Total paid over term
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Second mortgage tradeoffs
The main benefit is preserving the existing first mortgage. The main cost is carrying a second payment and often a higher rate than the first lien.
Preserve a low first rateThat can be valuable when the current first mortgage is materially cheaper than today’s market.
Higher blended monthly costA second lien can keep the first mortgage intact but still raise the total monthly payment meaningfully.
Use-case disciplineSecond-lien borrowing works best when the purpose of the funds is clear and the payment fits comfortably.
Related next steps
Compare second-lien math with other equity options before you decide.