HELOC Calculator 2026: Available Equity & Payment
HELOC in 2026: How Much Equity You Can Access, and What It Actually Costs
Your home equity line of credit limit isn't your home's value — it's what's left after your mortgage and the lender's max combined loan-to-value ratio. See your real number.
The national average HELOC interest rate was 7.43% as of July 22, 2026, according to Bankrate's survey of major lenders — most HELOCs price off the prime rate (6.75%) plus a lender margin. Your available credit line is typically capped by a combined loan-to-value (CLTV) ratio of 80%: take your home's value, multiply by 80%, then subtract your existing mortgage balance to find your maximum HELOC limit. During the draw period (commonly 10 years) many lenders allow interest-only payments; once the repayment period begins (commonly 20 years), you'll owe principal and interest, which raises the payment substantially.
A home equity line of credit lets you borrow against the value you've built up in your home — but "how much equity you have" and "how much you can actually borrow" are two different numbers. This guide walks through how lenders calculate your available HELOC limit in 2026, what current rates look like, and gives you a calculator for both.
1. How a HELOC Works
A HELOC is a revolving line of credit secured by your home, similar in structure to a credit card but backed by real estate. It has two phases: a draw period, typically 10 years, during which you can borrow, repay, and re-borrow up to your credit limit, often making interest-only payments on whatever balance you're carrying; and a repayment period, typically 20 years, during which you can no longer draw new funds and must pay down both principal and interest — usually raising your monthly payment substantially.
Most HELOCs carry a variable interest rate, calculated as an index (almost always the prime rate) plus a lender-set margin. With prime at 6.75% and a 0.75% margin, for example, the resulting rate would be 7.50%. Because the rate is variable, both your rate and payment can change over the life of the line as the prime rate moves.
2. 2026 HELOC Rates and CLTV Limits
According to Bankrate's national survey, the average HELOC rate stood at 7.43% as of July 22, 2026, holding near its highs for the year after a run of increases; separate industry data from Curinos has put the average closer to 7.2%-7.3% at various points earlier in 2026, reflecting differences in survey methodology and lender sets. Either way, HELOC pricing has stayed persistently above 7% through most of 2026 even as primary mortgage rates have hovered closer to 6%.
Lenders typically cap your combined loan-to-value (CLTV) ratio — your existing mortgage plus the new HELOC, divided by your home's value — at 80%, though this varies: some lenders extend to 85%, while more conservative underwriting standards (often used for the best advertised rates) cap it closer to 70%.
| Home Value | Mortgage Balance | Available Equity at 80% CLTV |
|---|---|---|
| $350,000 | $220,000 | $60,000 |
| $450,000 | $280,000 | $80,000 |
| $600,000 | $350,000 | $130,000 |
Available equity = (Home Value × Max CLTV%) − Mortgage Balance. Your specific limit will also depend on your credit score, income, and the lender's own underwriting standards.
3. The HELOC Calculator
Enter your home value, mortgage balance, and lender's max CLTV to find your available credit line, then see what a draw would cost during the interest-only draw period versus full repayment.
4. HELOC vs Home Equity Loan vs Cash-Out Refinance
A home equity loan disburses a single lump sum with a fixed rate and fixed payments from day one — useful when you know exactly how much you need. National average home equity loan rates have run modestly higher than HELOC rates through much of 2026 in some surveys and lower in others, so it's worth comparing both directly rather than assuming one is always cheaper.
A cash-out refinance replaces your entire mortgage with a new, larger one at current market rates — which can mean giving up a low rate on your existing mortgage if you locked one in previously. See our refinance break-even calculator to compare that trade-off directly.
5. Risks and Considerations
6. Frequently Asked Questions
Most lenders cap total borrowing (your existing mortgage plus the new HELOC) at 80% of your home's value, sometimes called the combined loan-to-value ratio, though some lenders allow up to 85% and more conservative lenders cap it at 70%. Subtract your current mortgage balance from that maximum to find your available HELOC credit line.
During the draw period, typically 10 years, you can borrow, repay, and re-borrow against your credit line, often making interest-only payments. Once the draw period ends, the HELOC enters the repayment period, commonly 20 years, during which you can no longer draw funds and must pay both principal and interest, which usually raises the monthly payment significantly.
Most standard HELOCs have a variable rate tied to an index, typically the prime rate, plus a lender-set margin — so the rate and payment can change over the life of the line. Some lenders offer fixed-rate HELOC options or the ability to convert a portion of the balance to a fixed rate, often at a slightly higher initial cost for that stability.
A HELOC is a revolving credit line you can draw from as needed, typically with a variable rate, while a home equity loan disburses a single lump sum upfront with a fixed rate and fixed monthly payments from day one. National average rates for the two products differ and change independently, so it's worth comparing both for your specific need.
If your home's value falls enough to push your combined loan-to-value ratio above the lender's limit, the lender may freeze or reduce your available credit line, even if you haven't missed a payment. This is a real risk to plan for, particularly if you're relying on a large undrawn credit line as a financial cushion.
7. Update Archive
✅ Key Takeaways
- National average HELOC rate: 7.43% as of July 22, 2026 (Bankrate).
- Available equity = (Home Value × Max CLTV) − Existing Mortgage Balance, typically capped at 80% CLTV.
- Draw-period payments are often interest-only; repayment-period payments include principal and can be much higher.
- Most HELOC rates are variable, tied to the prime rate plus a margin.
- Compare a HELOC against a home equity loan and cash-out refinance before deciding.
Financial Tools & Official Resources
๐ Sources & External References
- Bankrate — National HELOC rate survey, July 22, 2026.
- Curinos — Home equity rate data, as reported across multiple 2026 market summaries.
- Federal Reserve — Selected Interest Rates (H.15), Prime Rate data.
- Consumer Financial Protection Bureau — home equity lending consumer guidance.