United States·Updated for 2026·Figures in USD · fees not included
HELOC Calculator
See how much you could borrow with a home equity line of credit, the interest-only payment while you draw, and how much the payment rises when the repayment period starts.
Your home
$
What it would appraise for
$
What you still owe
Share of the home's value the lender will lend against
%
Your credit line
$
Blank uses the most you could borrow
Usually variable; use today’s rate
%
When you can borrow; often interest only
years
years
Enter your home's value, what you owe and the interest rate. How much you could borrow and the monthly payment appear here as you type.
Calculating
Show the mathSee how this was worked outHide
The borrowing limit follows the method in the CFPB’s home equity booklet. The draw-period payment assumes the full amount is drawn and only interest is paid; HELOC rates are usually variable, so real payments change with the rate.
Updated ·Source: the CFPB and the FTC·Runs entirely in your browser — nothing is uploaded
Last reviewed November 1, 2026. The borrowing limit follows the CFPB's home equity booklet; payments are standard monthly amortization.
How much can you borrow?
Many lenders start from a share of your home's value and subtract what you still owe. The CFPB's booklet gives an example: a $100,000 home at 75% is $75,000, and with $40,000 owed on the mortgage, the potential line of credit is $35,000. On a $400,000 home with $220,000 owed, the same 75% gives $80,000. The lender also looks at your income, debts and credit history, and the FTC notes that many lenders prefer you borrow no more than 80 percent of your equity.
A worked example
Drawing $50,000 at 8% costs about $333.33 a month in interest during a 10-year draw period. When the 10-year repayment period starts, you can no longer borrow and the payment rises to $606.64, $273.31 more a month. Over both periods the interest comes to $62,795.96.
HELOC payments at 8%
With the full amount drawn, a 10-year draw period and a 10-year repayment period:
Balance
Interest-only payment
Repayment payment
Increase
Total interest
$25,000
$166.67
$303.32
$136.65
$31,398.60
$50,000
$333.33
$606.64
$273.31
$62,795.96
$75,000
$500.00
$909.96
$409.96
$94,194.62
$100,000
$666.67
$1,213.28
$546.61
$125,593.19
$150,000
$1,000.00
$1,819.91
$819.91
$188,389.97
The payment jump when the draw period ends
The CFPB warns that when a HELOC's draw period ends, you start repaying principal as well as interest, and monthly payments are often significantly higher. Some plans instead want the whole balance at once. Because most HELOC rates are variable, payments can also rise during the draw period if rates go up.
A home equity line of credit lets you borrow against your home up to a limit, repay, and borrow again. Many plans have a draw period, such as 10 years in the CFPB’s example, when you can borrow and may pay only interest, followed by a repayment period when you can no longer borrow.
How much can I borrow with a HELOC?
Many lenders set the limit as a percentage of your home's appraised value less what you owe. The CFPB's example uses 75%: a $100,000 home with $40,000 owed gives a potential line of $35,000. Lenders also check your income, debts and credit.
Why does my payment go up when the draw period ends?
During the draw period you may pay only interest. Once repayment starts, you pay principal too. On $50,000 at 8%, the payment rises from about $333.33 to $606.64 a month over a 10-year repayment period.
Is a HELOC rate fixed or variable?
HELOCs usually have variable rates, so payments can change. Home equity loans typically have a fixed rate.
What happens if I cannot repay?
Your home secures the line of credit, so if you cannot repay you could lose it. The CFPB also notes that a lender may stop further draws if your home’s value drops significantly.
