Car Savings Calculator: Monthly Amount to Buy a Car
Work out how much to save each month to buy a car with cash by a target date — and skip the interest a loan would charge.
Adjust the inputs and select Calculate for a full breakdown.
Compare Common Scenarios
How the numbers shift across typical situations for this calculator:
| Scenario | Monthly contribution | Total contributed | Growth toward goal |
|---|---|---|---|
| $30k · 3% · 3yr | $797.44 | $28,707.71 | $1,292.29 |
| $18k · 2.5% · 2yr | $732.19 | $17,572.49 | $427.51 |
| $45k · 4% · 5yr | $678.74 | $40,724.61 | $4,275.39 |
| $12k · 3.5% · 4yr | $233.27 | $11,197.06 | $802.94 |
How This Calculator Works
Enter the cash price of the car, the rate your savings earn, and how long you have. The calculator solves for the monthly contribution that reaches the price, and shows how much of it is your deposits versus interest earned.
The Formula
Required Monthly Saving (Sinking Fund)
FV = goal amount, r = monthly rate (annual ÷ 12), n = number of months
Worked Example
Saving for a $30,000 car over 3 years at a 3% return needs about $797 a month. Deposits make up roughly $28,700 of it, with interest adding the rest — and no loan interest is paid at all.
Key Insight
Saving up and paying cash flips the math of a car loan: instead of paying interest to a lender, you earn a little interest yourself. The trade-off is waiting, and the risk that the car's price rises before you buy.
U.S. car cost benchmarks 2024
NEW CAR avg 2024 (Cox Auto). ~$48,000.
Substantial — substantial substantial increase from $36K 2020.
Substantial — substantial substantial inflation + chip shortage substantial.
BY SEGMENT.
Compact sedan. $20K-$30K.
Mid-size sedan. $25K-$40K.
Full-size sedan. $35K-$50K+.
Compact SUV. $25K-$40K.
Mid-size SUV. $35K-$55K.
Full-size SUV. $50K-$80K+.
Compact truck. $25K-$40K.
Full-size truck. $40K-$70K+.
Luxury sedan. $50K-$120K.
Luxury SUV. $60K-$150K+.
Electric (Model 3, ID.4). $35K-$55K (pre-incentives).
Electric luxury (Model S, Lucid, EQS). $80K-$150K+.
USED CAR market 2024.
3-yr-old. $25K-$40K typical.
5-yr-old. $15K-$25K.
10-yr-old reliable. $5K-$12K.
Substantial — substantial post-2021 used prices substantial elevated.
Substantial — substantial substantial substantial substantial.
DEPRECIATION new car.
Year 1. 20-30%.
Year 2-3. 10-15%/yr.
Year 4-5. 7-10%/yr.
Substantial — substantial buying 2-3 yr old substantial avoids worst depreciation.
Substantial — substantial substantial substantial substantial.
Total cost of ownership + financing
TOTAL COST OF OWNERSHIP (Edmunds TCO).
5-year typical mid-size sedan. $35K-$50K.
Substantial — substantial purchase + depreciation + fuel + insurance + maintenance + financing.
AVERAGE annual ownership.
Insurance. $1.5K-$3K.
Fuel. $1.5K-$3K.
Maintenance + repairs. $500-$2,000.
Registration + taxes. $200-$1,500.
Substantial — substantial total $4K-$10K/year.
Substantial — substantial substantial substantial substantial substantial.
FINANCING substantial.
New car loan rates 2024. 6.5-9% (good credit).
Used car loan rates 2024. 7.5-12% (good credit).
Subprime <620 FICO. 14-20%+.
Substantial — substantial 72-month avg term 2024.
Substantial — substantial substantial substantial substantial.
Substantial — substantial 60-month preferred substantial.
Substantial — substantial 84-month substantial trap.
DOWN PAYMENT substantial.
20% recommended new.
Substantial — substantial 10% minimum.
Substantial — substantial avoid underwater loan.
Substantial — substantial $48K × 20% = $9,600 down.
Substantial — substantial substantial substantial substantial substantial.
MONTHLY PAYMENT math.
$48K − $9.6K down = $38.4K loan.
× 7.5% × 60 months ≈ $770/month.
Substantial — substantial substantial substantial.
Substantial — substantial substantial substantial substantial.
ELECTRIC VEHICLE incentives 2024.
Federal §30D credit. Up to $7,500.
Substantial — substantial battery sourcing requirements.
Substantial — substantial income limits ($150K single / $300K MFJ).
Substantial — substantial sales price limits ($55K cars / $80K SUVs/trucks).
Substantial — substantial substantial substantial substantial substantial.
Used EV credit §25E. Up to $4,000 (used <$25K, 2+ yrs old).
Substantial — substantial substantial substantial substantial.
State incentives substantial. CA, CO, NJ substantial additional $2K-$7.5K.
Substantial — substantial substantial substantial.
U.S. car cost benchmarks (2024)
Reference car costs.
| Segment | Typical price |
|---|---|
| Compact sedan | $20K-$30K |
| Mid-size sedan | $25K-$40K |
| Compact SUV | $25K-$40K |
| Mid-size SUV | $35K-$55K |
| Full-size truck | $40K-$70K+ |
| Electric Tesla Model 3 | $35K-$45K (pre-credit) |
| Luxury sedan | $50K-$120K |
| 3-yr-old used | $25K-$40K |
| 10-yr-old reliable | $5K-$12K |
| New car avg 2024 | ~$48,000 |
| Year 1 depreciation | 20-30% |
| 5-yr TCO mid-size | $35K-$50K |
New car avg substantial $48K 2024 (+33% from 2020). Year 1 depreciation 20-30% substantial — buying 2-3 yr old substantial avoids worst. Federal EV §30D up to $7,500 + state incentives. 20% down recommended new. 60-month term preferred over 72-84. Cox Auto + Edmunds + DOT data.
Frequently Asked Questions
Is it better to save up or take a car loan?
Saving avoids loan interest and the risk of owing more than the car is worth. A loan gets you the car sooner. The right choice depends on need and on the loan rate.
What price should I enter?
Use the full out-the-door cash price, including taxes and fees. For a used car, allow some margin, since prices shift between now and your purchase date.
Where should I keep car savings?
For a purchase within a few years, a safe account such as a high-yield savings account suits it better than investments that could fall in value.
What if car prices rise before I buy?
Vehicle prices move over time. Revisit the goal against the cited new-vehicle price trend and adjust the monthly contribution if needed.
Should I save the full price or a down payment?
Either works. Set the goal to the full cash price to avoid a loan, or to a down payment if you intend to finance the rest.
When is this calculator unreliable?
Less reliable when new vs used substantial cost difference, when financing rates vary 4-12% based on credit + term (subprime 14-20%+), when insurance + registration + maintenance ongoing $2-$5K/yr not modeled, when depreciation new car 20-30% Y1 substantial, when electric vehicle incentives ($7,500 IRA federal + state $2K-$7.5K), or when trade-in value if applicable not included.
References & Authoritative Sources
- Cox Automotive / Kelley Blue Book — U.S. Auto Industry Reports · consulted June 1, 2026 · Industry data
- Edmunds — True Cost to Own · consulted June 1, 2026 · Auto cost research
- U.S. Department of Transportation — Vehicle Costs + Standards · consulted June 1, 2026 · Federal data
Related Calculators
Data Sources & Benchmarks
This calculator draws on 3 independent, dated sources. The starting values for savings return rate are taken from the benchmarks below and refresh whenever the snapshots are updated.
Methodology & Review
Car savings = target price / horizon × (1 + return). U.S. avg new car 2024 (Cox Automotive, Kelley Blue Book): ~$48,000; used 3-year-old ~$28K-$35K; reliable used 5-10 yr $10K-$20K. HYSA 4-5% short horizon. Substantial down-payment 10-20% recommended new (avoid underwater loans). Total cost of ownership beyond purchase substantial. RELIABILITY: Reliable for documented target. Less reliable when (a) new vs used substantial cost difference, (b) financing rates vary 4-12% based on credit + term, (c) insurance + registration + maintenance ongoing $2-$5K/yr, (d) depreciation new car 20-30% Y1, 10-15% Y2-3, (e) electric vehicle incentives ($7,500 IRA federal + state), (f) trade-in value if applicable.
Updated