How much should a car payment be? The common rules say no more than 10 to 15 percent of your take-home pay, or the 20/4/10 rule measured against gross income. Both are reasonable. What neither tells you is which paycheck pays it, and what that paycheck is already carrying.
How much should a car payment be? The common rules
The loan payment alone, measured against what lands in your account.
Put 20 percent down, borrow for four years at most, and keep the payment plus insurance, fuel and upkeep under 10 percent of gross income.
On $4,000 a month of take-home pay, the first rule says a car payment should be between $400 and $600. The second is stricter than it looks, because its 10 percent has to cover far more than the loan.
What percentage of income should go to a car payment: gross or take-home?
A percentage means nothing until you know what it is a percentage of. Calculators usually ask for your salary, which is gross, and then apply a rule written for take-home pay. The gap is large.
$60,000 a year is $5,000 a month before anything comes out. After federal tax, Social Security, Medicare and a health plan, say $3,750 lands. Fifteen percent of gross is $750. Fifteen percent of take-home is about $560.
Work from the paycheck, because that is what pays the loan. If the distance between those two numbers is new to you, gross vs net pay walks through where it goes.
The payment is not the cost of the car
The loan is the part with a contract. The rest arrives without one: insurance, fuel, maintenance, tires, registration, and the repair nobody scheduled.
Insurance is usually monthly and easy to plan. Registration and tires come once a year or less, which is exactly why they break a budget. Put a small amount aside from each paycheck in a sinking fund so the renewal is already paid when it arrives.
So when you test a payment against a rule, test the whole cost. A $450 payment with $180 of insurance and $150 of fuel is a $780 car before it needs a single repair.
What a car payment looks like per paycheck
Car loans bill monthly. Your pay may not. Here is a $450 payment on each schedule.
52 paychecks and 12 payments a year. Set aside $450 × 12 ÷ 52, about $104 from every check.
26 paychecks. Set aside $225 from each of the two checks in a month, and the two months with a third paycheck leave that one free.
24 paychecks, always two a month. $225 from each, and it always closes.
One check pays it all. Put the due date a few days after payday.
The every two weeks case is the one that catches people. Your paydays drift against a due date that does not, so the check that lands just before the payment changes through the year. Paying it from whichever check is nearest works until the month it does not. The longer version is in how to split a paycheck between the bills it has to cover.
Is a $500 car payment too much?
There is no single answer, because it depends on the paycheck that pays it and what else that paycheck carries.
Take someone paid $1,900 every two weeks with rent of $1,200 on the 1st. The first check of the month pays the rent. Put the car on the second check and $1,900 − $500 − $150 of insurance leaves $1,250 for two weeks, which is comfortable.
Move the same payment onto the rent check and $1,900 − $1,200 − $500 leaves $200 for two weeks of groceries, fuel and everything else. Same car, same income, a different paycheck.
So before you sign, check the payment against the specific paycheck that will pay it, after the bills it already carries. If it is tight on the heaviest check of the month, it is too much. The same test for housing is in how much of your paycheck should go to rent.
When the car payment is already too high
If you already have the loan, there are four levers, and they fix different things.
Lenders will often move it to a few days after the paycheck meant to carry it. That fixes the timing, not the size.
A lower rate lowers the payment. A longer term does too, but costs more interest in total, so use it for breathing room, not as a habit.
Compare insurance quotes at renewal, since it is the biggest cost after the loan that you can change quickly.
This works only when the car is worth more than you owe. Check that first.
Doing this in Cashrou
In Cashrou a car payment is an expense on the day it is really due, so it lands in the pay period that has to pay it, next to the rent and bills that period already carries.
The payday screen shows what is left between now and your next payday after those bills. Add a payment you are considering and the payday that would carry it shows what it leaves, before you sign anything. Insurance can sit beside it as its own expense, so the whole car shows up, not only the loan.
It handles weekly, every other week, twice-monthly and monthly pay, so the per paycheck arithmetic above is done for you.
A monthly budget says whether a car fits your year. This says whether it fits the paycheck that pays for it.
