Vehicle EconomicsPayment Needed to Reach Positive Equity Faster
Solve the extra monthly payment needed to be equity-positive by a specific target month.
Why this comes up
You know you're underwater and you have a specific date in mind, maybe a lease ending, a job relocation, or just wanting out from under a loan by a certain point, and you want to know exactly how much extra to pay each month to get there. This is a different question from "when will I naturally reach positive equity" or "how much do I save with an extra payment," it solves for a date you choose.
How we calculated this
We project your vehicle's value forward to your target month using your depreciation estimate, and search for the smallest extra monthly payment that brings your loan balance at that same month at or below that projected value.
Worked example, using this page's own defaults ($20,000 value, $22,000 balance, 6% APR, 48 months remaining, $2,400/year depreciation, 12-month target): a specific extra payment closes the gap by month 12, run the calculator above to check the exact figure for your own numbers.
What this means
- Positive equity can arrive before full payoff, so the extra payment required here can be meaningfully lower than what a target-payoff calculator would suggest.
- If the required extra payment is more than your budget allows, Trade Now vs Wait 6 Months or the negative equity recovery path may fit better than forcing this exact date.
- The depreciation estimate drives this answer heavily, if you're not confident in it, check it against a couple of real listings before committing to a payment plan.
Limitations
This is a planning model built on your own depreciation estimate, not a guaranteed valuation forecast, and it caps its search at a reasonable extra-payment range. See Methodology.
Methodology
This engine combines Vehicle Economics' fixed-rate amortization model (the standard loan-payment formula run out as a full month-by-month schedule), equity and depreciation projection model (your value and loan payoff projected forward from your own depreciation figure until they cross), and break-even search model (a closed-form solve where one exists, otherwise a bounded search over a stated plausible range). See Methodology for the full detail.