Finance

Car Savings Goal Monthly Deposit Calculator (15 Years)

Find the monthly deposit needed to reach a savings goal. This car version uses a 15-year planning term as its starting point.

The Monthly deposit figure is the fixed amount to save each month over the whole 15 years to reach the goal amount at the rate entered, assuming every monthly deposit is made and the rate stays unchanged.

Formula

Monthly deposit equals goal times monthly rate divided by one plus monthly rate to the power of months minus one.

How it works

Saving a fixed amount each month with interest reaches the goal faster than saving without interest.

Worked example

Goal $50,000, annual rate 5%, term 15 years. First, the monthly rate is 5% divided by 12, which is 0.0041667, and the number of payments is 15 times 12, which is 180. Using the monthly deposit formula, the monthly deposit is $187.06. Over 180 payments the deposits add up to $33,671.43, calculated from the unrounded deposit exactly as the calculator does, and interest adds $16,328.57 to reach the $50,000 goal. That interest is 32.7% of the goal.

Who this term suits for a car buyer: A 15-year term suits a car buyer with a long, steady plan, for example saving for a work vehicle or a family car for a later stage of life. The monthly amount is much lower, but the risk is car-price inflation: $50,000 today will not buy the same car in 15 years, so the goal may need to rise over time.

FAQs

How much should I save each month?
Divide the goal by the growth of regular deposits at the assumed rate to get the monthly amount.

Is this car calculator exact?
No, it is an estimate for planning only, based on the numbers you enter.

Are these figures financial advice?
No, they are estimates for planning only, not financial advice. Check with a qualified adviser for decisions involving large sums.

How does a 15-year term balance the monthly amount and the interest?
At 15 years the buyer pays $187.06 a month for 180 payments, deposits add up to $33,671.43, and interest adds $16,328.57, which is 32.7% of the goal. The monthly amount is far lower than the 5-year plan, but interest now does about a third of the work, so the plan depends much more on the 5% rate holding.

What if car prices rise faster than the 5% rate over 15 years?
Then the $50,000 fund may fall short of the car the buyer first planned, because the fund grows at 5% while car prices could rise faster. The buyer would need to raise the monthly deposit, raise the goal, delay the purchase, or choose a different car. This calculator does not include car-price inflation, fees, or taxes.

Can I use a 15-year car fund for a different car than planned?
Yes, a savings fund is not tied to one car model. If needs change in 15 years, for example a larger family car or a work vehicle is needed instead, the $50,000 fund can be used for that car. The plan works best when the buyer saves for a fund amount, not for one exact model fixed 15 years early.

Estimates only, not financial advice. Figures are approximate and do not include all fees, taxes, or changing rates unless stated.