HELOC Payment Calculator

How much is the monthly payment on a $50,000 HELOC?

A home equity line of credit (HELOC) works like a credit card secured by your house: you get a credit limit, borrow what you need when you need it, and pay interest only on what you’ve drawn. Its lifetime splits into two phases that feel like two different loans — which is why there is no single answer to “what is the payment?”

• Draw period (usually 10 years). You can borrow, repay, and re-borrow freely. Required payments are typically interest-only — affordable, but your balance never shrinks on its own.
• Repayment period (usually 10–20 years). The line closes to new borrowing and whatever you owe converts to a fully amortizing loan: every payment now includes principal, so payments jump substantially.

The draw-period payment is the simplest number in home lending — no amortization, just one month’s interest on what you owe:

Draw-period payment = balance × (annual rate ÷ 12)

So $50,000 × (9% ÷ 12) = $375.00 a month, every month, for ten years — and at the end of those ten years you still owe the whole $50,000, having paid $45,000 in interest for the privilege.

Then the second phase starts, and the payment jumps. That jump is called payment shock, and it’s the single most important thing to understand before signing. Here is what the repayment period does to the same $50,000 at 9%, after a 10-year draw:

Read that table in both directions. A shorter repayment period means a brutal payment jump (+69% on a 10-year repayment) but far less total interest — $71,005 instead of $102,967. A longer one softens the shock to a manageable +20% and costs you an extra $31,962 in interest. The calculator above shows your exact before-and-after numbers so you can budget for the second phase from day one.

The variable-rate factor

Most HELOCs float with the prime rate: when the Federal Reserve moves, your rate — and next month’s payment — moves too. A practical stress test: rerun the calculator with your rate 2 percentage points higher. If that payment would strain your budget, consider borrowing less, or ask your lender about a fixed-rate lock option, which many HELOCs now offer on part or all of the balance. If you want full rate certainty from the start, compare with our home equity loan calculator — same collateral, fixed rate, fixed payment.

Why HELOCs boomed when mortgage rates rose

Millions of homeowners locked in mortgages near 3% in 2020–2021. For them, a cash-out refinance at today’s 6–7% would reprice their entire mortgage just to extract some cash — a terrible trade. A HELOC (or home equity loan) taps equity while leaving the cheap first mortgage untouched, which is why home-equity borrowing has surged since 2022. The HELOC’s draw-as-you-need design also means a renovation that runs in stages doesn’t rack up interest on money sitting idle.

Smart HELOC habits

• Pay principal during the draw period, even though you don’t have to. Every dollar of principal you retire early shrinks both your interest cost and the payment jump later.
• Don’t treat the line as an emergency fund substitute. Lenders can freeze or reduce HELOCs when home values drop — exactly when you might need the money.
• Watch the fees: annual fees ($50–$100), early-closure fees, and appraisal costs vary widely between lenders and are often negotiable.
• Borrow for things that outlast the debt. A roof, not a vacation. The house is the collateral either way.

Disclaimer: This calculator is for educational purposes only and provides estimates based on the numbers you enter. It is not financial, legal, or tax advice. Actual loan terms, rates, and payments depend on your lender and personal circumstances. All calculations run in your browser — nothing you enter is stored or sent anywhere.