How Much HELOC Can You Get?
Find out how much home equity you can borrow against
This HELOC calculator estimates how much you could borrow through a Home Equity Line of Credit based on your home's value, your remaining mortgage balance, and typical lender loan-to-value limits.
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Available Credit Limit
$0
Interest-Only Payment (Draw)
$0
Payment During Repayment
$0
Total Interest Paid
$0
Draw vs. Repayment Cost
Principal
Draw Interest
Repay Interest
Remaining equity after HELOC$0
Combined LTV after draw0%
Total repaid over life$0
Repayment Period Amortization (Year by Year)
🔗 Related Calculators
📖 HELOC — How a Home Equity Line of Credit Actually Works
A HELOC (Home Equity Line of Credit) is a revolving credit line secured by your home, letting you borrow against your equity as needed rather than receiving one lump sum. Unlike a standard second mortgage, a HELOC has two distinct phases with very different payment structures — understanding both is essential before drawing on one.
How Your Credit Limit Is Calculated
Lenders typically cap your combined loan-to-value (CLTV) — your first mortgage plus the new HELOC — at 80-85% of your home's appraised value. Your available HELOC limit is your home value multiplied by the max CLTV, minus what you still owe on your existing mortgage.
| Home Value | Max CLTV | Existing Mortgage | Available HELOC Limit |
|---|---|---|---|
| $500,000 | 80% | $250,000 | $150,000 |
| $500,000 | 85% | $250,000 | $175,000 |
| $500,000 | 80% | $400,000 | $0 |
The Draw Period: Interest-Only Payments
During the draw period (commonly 5-10 years), you can borrow, repay, and re-borrow against your credit line, similar to a credit card. Most HELOCs only require interest-only payments during this phase — you're paying the cost of borrowing, but not reducing the principal balance unless you choose to. This keeps payments low, but it also means the full amount drawn is still owed when the draw period ends.
The Repayment Period: Principal + Interest
Once the draw period ends, the HELOC converts to a standard amortizing loan over the repayment period (commonly 10-20 years) — your outstanding balance is now paid down in fixed principal-plus-interest installments, similar to a regular loan. This is where many borrowers are caught off guard: a payment that was manageable during interest-only years can jump significantly once principal repayment begins.
Variable Rates Are the Norm
Most HELOCs carry a variable interest rate tied to a benchmark (like the prime rate), meaning your payment can rise or fall over the life of the loan — unlike a fixed-rate mortgage. This calculator uses a single rate for simplicity, but in practice it's worth stress-testing your budget against a meaningfully higher rate than today's, since rates can move substantially over a 10-30 year draw-plus-repayment timeline.
💡 Some lenders offer a fixed-rate conversion option on all or part of your HELOC balance once drawn — worth asking about if payment predictability matters more to you than the lowest possible starting rate.
HELOC vs. Home Equity Loan vs. Cash-Out Refinance
A HELOC is a revolving line you draw from as needed with a variable rate; a home equity loan is a fixed lump sum with a fixed rate and fixed monthly payment from day one; a cash-out refinance replaces your entire existing mortgage with a new, larger one. HELOCs tend to fit ongoing or uncertain expenses (renovations done in phases, a financial cushion), while a home equity loan or cash-out refinance often fits a single known expense better.
📚 Data Sources
- Amortization formula (how each payment splits between principal and interest): Wikipedia — Amortization schedule
Amortization mechanics are standard; actual HELOC rates, draw periods, and repayment terms vary by lender.
❓ Frequently Asked Questions
How much HELOC can I actually get?
Most lenders let you borrow up to 80-85% of your home's value, minus what you still owe on your mortgage. On a $500,000 home with a $250,000 mortgage balance and an 80% max CLTV, that's roughly $150,000 available — but your exact limit also depends on credit score, income, and the specific lender's policy.
Do I have to draw the full amount at once?
No — a HELOC is a revolving credit line, not a lump-sum loan. You can draw only what you need, when you need it, up to your approved limit, and you only pay interest on the amount actually drawn, not your full credit line.
What happens when the draw period ends?
The HELOC converts to the repayment period, where you can no longer draw new funds and your outstanding balance is repaid in fixed principal-plus-interest installments over the remaining term — typically causing a noticeable payment increase compared to the interest-only draw period.
Is HELOC interest tax-deductible?
In the US, HELOC interest is generally only tax-deductible if the funds are used to buy, build, or substantially improve the home securing the loan, per current IRS rules. Interest on funds used for other purposes (debt consolidation, tuition, etc.) typically isn't deductible. This isn't tax advice — check with a tax professional for your specific situation.
What's the difference between a HELOC and a home equity loan?
A HELOC is a revolving credit line with a variable rate that you draw from as needed. A home equity loan gives you one fixed lump sum upfront at a fixed rate with a fixed monthly payment from day one. HELOCs suit ongoing or uncertain expenses; home equity loans suit a single known expense.
How accurate are the results from this calculator?
This calculator gives you a mathematically precise estimate based on the numbers you enter. Real-world results can differ due to fees, rate changes, taxes, or other factors not captured in a simplified formula — treat the output as a planning estimate, not financial, tax, or legal advice.
Is this calculator free to use?
Yes. Every calculator on FinCalc is completely free, with no signup, subscription, or paywall required.
Does this calculator store or share my data?
No. All calculations run locally in your browser — nothing you type is sent to or stored on a server.