Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

HELOC Payment Calculator

Calculate how your HELOC payment will jump when the draw period ends and full principal-plus-interest repayment begins, especially if rates are expected to change. Use it to prepare for payment shock before it hits.

Current Balance Used ($)

Current Interest Rate (%)

Repayment Period

Expected Rate Change at Repayment (%)

Fill in the required fields to see your result.

Mortgage Advanced

ARM Payment Shock Calculator

Calculate the dollar increase in your monthly mortgage payment when an adjustable-rate mortgage resets from its initial rate to the fully indexed rate. Essential planning for ARM borrowers approaching a rate reset.

Loan Amount ($)

Initial ARM Rate (%)

Fully Indexed Rate (%)

Remaining Term at Reset (years)

Fill in the required fields to see your result.

Key differences

	HELOC Payment Calculator	ARM Payment Shock Calculator
Category	Mortgage Advanced	Mortgage Advanced
Inputs required	4	4
Result	Payment Increase at Repayment ($)	Payment Increase ($)
What it does	Calculate how your HELOC payment will jump when the draw period ends and full principal-plus-interest repayment begins, especially if rates are expected to change. Use it to prepare for payment shock before it hits.	Calculate the dollar increase in your monthly mortgage payment when an adjustable-rate mortgage resets from its initial rate to the fully indexed rate. Essential planning for ARM borrowers approaching a rate reset.