HELOC Payment Calculator

Estimate interest-only payments during your HELOC draw period and the higher amortizing payment once repayment begins — plus how much you can borrow.

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Your numbers

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Payment during draw period
$413
Interest-only, based on the amount drawn
Breakdown
Draw payment$413
Repayment payment$511
Payment after draw endsJumps 24%
$511
Maximum credit line available
$125,000
Amount drawn (capped to line)
$60,000
Current equity
$200,000
Interest paid during draw period
$49,500
Interest paid during repayment
$62,697
Total interest
$112,197
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How a HELOC is structured

A home equity line of credit has two distinct phases. During the draw period — typically 10 years — you can borrow, repay and re-borrow up to your limit, and the minimum payment is usually interest only. When the draw period ends, the line closes and you enter the repayment period, typically 10 to 20 years, during which the outstanding balance amortizes like a normal loan.

Payment shock is the thing to plan for

On a $60,000 balance at 8.25%, the interest-only payment is about $413 a month. Once repayment begins over 20 years, that becomes roughly $511 — and over 10 years it would be about $736. Borrowers who treat the draw payment as the real cost of the loan are frequently caught out. Model the repayment number before you draw, not after.

Variable rates cut both ways

Most HELOCs are priced at the prime rate plus a margin, and prime tracks the Federal Reserve's target rate. That means your payment can change with monetary policy. Lines carry a lifetime cap, often 18%, which is far above anything you would want to pay. Some lenders offer a fixed-rate conversion option on part of the balance — worth asking about if you are drawing a large sum you intend to carry for years.

Costs and fine print worth checking

  • Annual fee — commonly $50–$100, sometimes waived.
  • Early closure fee — many lenders reclaim waived closing costs if you close the line within three years.
  • Inactivity or minimum draw requirements — some lines require an initial draw at closing.
  • Freeze or reduction clauses — lenders can reduce or suspend an unused line if home values in your area fall or your credit deteriorates. This happened widely in 2008–09.

Sensible uses, and risky ones

A HELOC is well suited to a renovation with staged payments, a bridge between buying and selling, or a genuine emergency backstop that costs nothing until used. It is a poor fit for funding consumption or speculative investment, because the collateral is your home. Consolidating credit card debt into a HELOC lowers the rate substantially, but it converts debt that could be discharged or negotiated into debt that can cost you the house — only do it alongside a hard rule about not re-running the card balances.

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Frequently asked questions

How much can I borrow with a HELOC?

Most lenders allow a combined loan-to-value of 80–90%. On a $500,000 home with a $300,000 mortgage at 85% CLTV, the line would be about $125,000.

Why does the payment jump so much after the draw period?

During the draw you pay interest only. When repayment begins you must amortize the entire balance over the remaining term, so the payment can double or more. This is called payment shock and it is the biggest risk of a HELOC.

Is HELOC interest tax deductible?

Only when the funds are used to buy, build or substantially improve the home securing the loan, subject to overall mortgage debt limits. Interest on a HELOC used for a car or debt consolidation is not deductible. Confirm with a tax professional.

HELOC or home equity loan?

A HELOC is a variable-rate revolving line — flexible, but the rate moves with the prime rate. A home equity loan is a fixed-rate lump sum with predictable payments. Choose the HELOC for ongoing or uncertain costs, the fixed loan for a known one-time expense.

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Disclaimer: results are estimates for general information only and do not constitute financial, tax or legal advice. Actual figures depend on your lender, credit profile and jurisdiction. Verify any number with a qualified professional before acting on it.