Interest Free Payment Plan Calculator
Calculate monthly payments needed to clear 0% promotional retail financing. Protect yourself against retroactive "deferred interest" traps.
Promotional Payoff & Deferred Interest Formula
Target Monthly Payment = Purchase / Promo Months; Retroactive Interest = Average Balance × APR × Promo Years- Payoff Requirement: Monthly payment required to reach exactly $0.00 prior to promotional expiration.
- Deferred Interest Trap: Store credit cards often charge retroactive interest back to Day 1 on the full original purchase price if even $1.00 remains unpaid.
Step-by-Step Worked Example
Calculation Steps:
How to Use This Calculator
Assumptions & Limitations
- Assumes cardholder incurs no additional purchases on the same credit line.
Frequently Asked Questions
What is the difference between "0% Intro APR" and "Deferred Interest"?
With a true 0% Intro APR credit card, if a balance remains after the promo, interest only charges on the remaining balance going forward. With "Deferred Interest" store cards, failing to pay the entire balance by the deadline triggers retroactive interest on the entire original amount from day one.
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