Car loan calculator with prepayment — bank vs 4S dealer financing comparison, equal-installment / equal-principal / balloon plans, prepayment-savings simulation.
- Runs locally
- Category Calculator
- Best for Getting a realistic range before a purchase, plan, workout, or schedule decision.
- GPS installation fee (¥1,500-3,000) — sometimes mandatory, sometimes refundable on payoff.
- Registration / 上牌 fee (¥1,500-3,000) — often inflated 3-5x the actual DMV cost.
- Renewal deposit (¥3,000-8,000) — forfeited if you renew insurance elsewhere.
- Outbound / 出库 fee (¥800-2,000) — pure margin, negotiable.
- Financial service fee (¥3,000-8,000) — the kickback to the captive finance arm.
- Mandatory bundled insurance (¥5,000-12,000/yr × 3 years) — usually 30-50% above market.
What this tool does
Car loan calculator that actually tells the truth about Chinese car financing in 2026: equal-installment (本息), equal-principal (本金), and balloon-tail (气球贷, 20-50% lump at the end) repayment plans; side-by-side bank vs 4S dealer comparison that exposes the famous "0% interest" trick by computing the true APR after the dealer stacks GPS fees, registration, mandatory insurance and "service charges" on top; prepayment savings simulator that tells you how much interest you actually save by paying the loan off in month 18 vs month 36 vs month 48; full month-by-month principal-vs-interest schedule. Five built-in real-world scenarios cover a 100k family sedan, a 250k SUV, a 500k luxury car, a new-energy vehicle with subsidy, and a used-car loan. Everything runs 100% in your browser — your sticker price, down payment, salary and bank quotes never leave the device. Made for the moment you sit at the 4S dealer desk with a "preferred financing plan" in front of you and need to know in 30 seconds whether the real annualised rate is 3% or 11%.
Tool details
- Input
- Numbers
- The page exposes text boxes, numeric controls, file pickers, or structured inputs depending on the tool.
- Output
- Live result + Preview
- The result area focuses on usable output, with copy, download, or preview actions when supported.
- Privacy
- Browser-side processing
- The main tool logic does not call an external API, so inputs normally stay in the current tab.
- Save / share
- Shareable URL state
- Key settings are encoded in the URL so another person can reopen the same setup.
- Performance budget
- Initial JS <= 24 KB
- No WASM budget is declared, keeping the tool quick to open on mobile.
- Best fit
- Calculator · Marketer
- Category and role tags drive related tools, internal links, and quick fit checks.
How to use
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1. Input
Paste or drop your content into the tool panel.
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2. Process
Click the button. All processing is local in your browser.
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3. Copy / Download
Copy the result or download to disk in one click.
How Car Loan Calculator with Prepayment fits into your work
Use it for fast estimates, comparisons, and planning numbers before you make the final call.
Calculation jobs
- Getting a realistic range before a purchase, plan, workout, or schedule decision.
- Comparing scenarios by changing one input at a time.
- Turning rough assumptions into a number you can discuss.
Calculation checks
- Double-check units, dates, rates, and rounding assumptions.
- Treat health, finance, tax, and legal outputs as planning aids, not professional advice.
- Save the inputs that produced an important result so you can reproduce it later.
Good next steps
These links move the current task into a more complete workflow.
- 1 Loan Prepayment Calculator Loan prepayment calculator — see how much interest you save by paying extra each month or one-time, with breakeven analysis. Open
- 2 Mortgage Calculator Mortgage calculator — monthly payment, total interest, amortization schedule, early payoff scenarios. Open
- 3 Loan Comparison Calculator Loan comparison calculator — compare equal-payment vs equal-principal, multiple loans side by side, total interest breakdown. Open
Real-world use cases
Read the 4S dealer's "0% financing" sheet before you sign
You sit at the 4S dealer desk. They slide over a sheet: "0% interest for 3 years, monthly payment ¥4,200". You open this tool on your phone, switch to the Bank-vs-4S compare tab, plug in the ¥150,000 financed amount, 0% headline rate, and the fees they listed (¥5,000 service fee, ¥8,000/year insurance × 3 years, ¥2,000 GPS, ¥1,500 registration). The tool returns a true annualised rate of ~9.4% and total cost ¥31,500 above the bank-loan equivalent. You hand the phone to your partner and walk to the bank instead.
Decide if a 3-year balloon really saves money over a 5-year flat
Same car, ¥250,000 financed. Plan A: 5-year equal-installment at 5.0%. Plan B: 3-year balloon with 40% lump at month 36 and 5.5% rate. The tool shows Plan B's monthly is ¥1,800 lower for 36 months but the balloon is ¥100,000 due all at once, and total interest is roughly the same. You toggle the "refinance at higher rate if balloon comes due" stress test and see Plan B becomes ¥9,000 more expensive at 7% refi. Decision: only pick the balloon if the bonus is already in writing.
Test "what if I pay off 50k extra at month 12"
You have a ¥200,000 car loan at 5.5% over 5 years. A ¥50,000 year-end bonus lands. Plug month 12 + ¥50,000 prepayment into the simulator: term shortens by around 13 months, interest saved roughly ¥10,000. Try the same ¥50,000 at month 36 and savings drop dramatically because there are only 24 months of interest left to kill. The lesson: with car loans the prepayment-savings curve falls off fast because the loan is short to begin with. Either prepay early or save the cash for the next car.
Compare a new energy vehicle subsidy against a regular car
You're choosing between a ¥180,000 ICE car (no subsidy, straightforward bank loan at 5.0%) and a ¥210,000 BEV (¥10,000 trade-in subsidy, ¥5,000 charging-pile rebate, some city plates free). Plug both into the calculator with your real down payment and term, and the comparison row shows the BEV all-in monthly is actually ¥420 cheaper after the subsidies — not the ¥600 more it looked like on the showroom sticker.
Stress-test "what if I lose my job at month 18"
Run the loan as planned. Then in the prepayment simulator, set a partial prepayment at month 18 equal to your 3-month emergency-fund buffer to estimate what would happen if you lost income and had to pay down aggressively to avoid default. The tool returns the new monthly and the months shortened. If even after that emergency lump the remaining monthly is still 40%+ of a part-time income, the loan was too aggressive to begin with.
Common pitfalls
Comparing the bank's published rate against the 4S dealer's "0%" headline rate without computing the true APR. The dealer's hidden fees can flip a 0% offer into an effective 9-12% cost. Always plug the fees in and read the true-APR line.
Picking the balloon plan because the monthly is lower, without a confirmed source for the lump payment. If the balloon comes due and you have to refinance at a higher rate or sell the car cheap, the balloon is worse than a plain term loan.
Forgetting that many car loans have prepayment penalties for the first 12-18 months (1-3% of remaining principal) and some 4S dealer captive loans contractually forbid full early payoff until month 24. Read the contract clause before you assume you can prepay.
Privacy
All numbers — sticker price, down payment, your income, bank quotes, dealer fee list — are computed locally in JavaScript and never sent to any server. No analytics on the figures you type, no log of which dealer or which model you priced. You can paste the actual 4S dealer "preferred financing plan" sheet number by number — none of it leaves the tab.
FAQ
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