Payoff Time Formula:
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Definition: This calculator determines how long it will take to pay off your home mortgage using Dave Ramsey's debt snowball method principles.
Purpose: It helps homeowners understand the payoff timeline when making extra payments or following an accelerated payoff strategy.
The calculator uses the formula:
Where:
Explanation: The formula calculates how many payments are needed to fully amortize the loan given the payment amount and interest rate.
Details: Knowing your payoff timeline helps with financial planning, budgeting, and understanding the impact of extra payments on your mortgage.
Tips: Enter your monthly payment (including any extra payments), the remaining principal balance, and your annual interest rate. All values must be > 0.
Q1: What if my payment is too small to ever pay off the loan?
A: The calculator will warn you if your payment doesn't cover the interest (M ≤ P×r), meaning you'll never pay off the principal.
Q2: How does this differ from a standard mortgage calculator?
A: This calculates time-to-payoff given a payment amount, rather than calculating payment given a term length.
Q3: Does this account for property taxes and insurance?
A: No, it calculates based on principal and interest only - use your P&I payment amount.
Q4: How accurate is this for adjustable-rate mortgages?
A: It assumes a fixed rate. For ARMs, recalculate whenever your rate changes.
Q5: Can I see the interest savings from extra payments?
A: This version shows payoff time only. For interest savings, use our Mortgage Payoff Analysis tool.