Equal-principal mortgage on a 1,000,000 30-year loan at 3.45%: first payment ≈5,653, decreasing ~8/month; total interest ≈519,000.
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Frequently Asked Questions
What is the first monthly payment on a 1M 30-year equal-principal mortgage?▼
At 3.45%: the first payment is about 5,653, decreasing by ~8 each month, with total interest ≈ 519,000 — saving about 87,000 vs equal installments (4,462/month).
How do I use the Mortgage Calculator?▼
Open the page and fill in the input fields — results update automatically. Monthly payment, rates and early-payoff comparison.
Are the results accurate?▼
Yes. Standard financial formulas and published rate data are used. For official figures, consult your financial institution.
Is it free? Do I need to sign up?▼
Completely free. No registration, login or download required.
Can I use the results for financial decisions?▼
Results are for reference. Consult a licensed financial advisor before major decisions.
💡
This is a dedicated variant of the Mortgage Calculator, pre-configured for this scenario with tailored FAQs.
2Monthly principal = P ÷ n = 2,777.78; month k payment = principal share + remaining × r
3First month 5,652.78, last month 2,785.76
4Total interest = 518,937.50 (34.2%)
5Y+ LPR history (year-end)
20204.65%
20214.65%
20224.30%
20234.20%
20243.60%
20253.45%
Equal payment keeps the monthly outlay constant (better for stable budgets); equal principal costs more early on but saves 10–20% total interest over 30 years. LPR repricing applies from your loan's repricing date — a rate cut does not lower your payment immediately.
💡 Switch to the "Prepayment" tab to compare 3 early-payoff plans
Remaining principal at month N833,333.33CNY
Actual prepayment200,000.00CNY
Remaining after prepayment633,333.33CNY
3 Prepayment Plans
Same payment, shorter term
New Payment 4,598.61CNY
Months Left 228 mo
Interest Saved 0.00CNY
Same term, lower payment
New Payment 3,931.94CNY
Months Left 300 mo
Interest Saved 0.00CNY
Payment↓ + Term↓
New Payment 4,219.82CNY
Months Left 264 mo
Interest Saved 0.00CNY
💡 Plan 1 saves the most interest (same payment); Plan 2 gives the lowest payment; Plan 3 is in between
剩余本金曲线
Remaining principal / Years
Principal balance falls as payments continue
Yearly Breakdown
Y1Y30
PrincipalInterestHover for yearly details
Amortization schedule (360 payments)
Period
Monthly Payment
Principal
Interest
Remaining
1
5,652.78
2,777.78
2,875.00
997,222.22
2
5,644.79
2,777.78
2,867.01
994,444.44
3
5,636.81
2,777.78
2,859.03
991,666.67
4
5,628.82
2,777.78
2,851.04
988,888.89
5
5,620.83
2,777.78
2,843.06
986,111.11
6
5,612.85
2,777.78
2,835.07
983,333.33
7
5,604.86
2,777.78
2,827.08
980,555.56
8
5,596.88
2,777.78
2,819.10
977,777.78
9
5,588.89
2,777.78
2,811.11
975,000.00
10
5,580.90
2,777.78
2,803.13
972,222.22
11
5,572.92
2,777.78
2,795.14
969,444.44
12
5,564.93
2,777.78
2,787.15
966,666.67
当前仅显示前12期，点击"展开全部"查看完整明细
Mortgage rate reference table
¥1,000,000 loan · 30 years · equal payment · compounded monthly. For reference only — actual terms follow your bank offer.
Annual Rate
Monthly Payment
Total Interest
Total paid
3.00%
4,216.04
517,775
1,517,775
3.10%
4,270.16
537,259
1,537,259
3.20%
4,324.67
556,881
1,556,881
3.30%
4,379.55
576,639
1,576,639
3.40%
4,434.81
596,532
1,596,532
3.50%
4,490.45
616,561
1,616,561
3.60%
4,546.45
636,723
1,636,723
3.70%
4,602.83
657,019
1,657,019
3.80%
4,659.57
677,446
1,677,446
3.90%
4,716.68
698,006
1,698,006
4.00%
4,774.15
718,695
1,718,695
4.10%
4,831.98
739,514
1,739,514
4.20%
4,890.17
760,462
1,760,462
Tip: every 0.1% off the rate saves roughly ¥20,000 interest on a 30-year ¥1M loan.
Prepayment scenarios: pay ¥200,000 lump sum
¥1,000,000 loan · 30 years · 3.6% · equal payment. After N payments, prepaying ¥200,000 either shortens the term or lowers the payment.
After payment #
Balance before
Shorten term to
Interest saved (term)
Payment drops to
Interest saved (payment)
12
981,133
242 mo
281,924
3,619.68
122,518
24
961,576
233 mo
268,285
3,600.83
117,730
36
941,303
224 mo
254,645
3,580.46
112,981
60
898,504
206 mo
227,367
3,534.45
103,602
Reading the table: the earlier you prepay, the more interest you kill — after only 12 payments a ¥200,000 lump sum saves the most, because early payments are mostly interest under equal-payment amortization. Choosing "shorten term" always saves more interest than "lower payment" for the same lump sum; "lower payment" wins when monthly cash flow is tight.
Rule of thumb: if your investment return is consistently below your mortgage rate, prepaying is a risk-free "return" at the mortgage rate; if you can beat the rate after tax and fees, keep the cash liquid.
Down payment & term scenarios (3.6%)
Down payment
Down (¥1.5M home)
Loan
Monthly (30y)
15%
225,000
1,275,000
5,796.73
20%
300,000
1,200,000
5,455.74
30%
450,000
1,050,000
4,773.78
40%
600,000
900,000
4,091.81
Term (¥1M loan)
Monthly
Total interest
Interest vs 30y
20 yr
5,851.11
404,268
+232,456
25 yr
5,060.03
518,008
+118,715
30 yr
4,546.45
636,723
—
Down payment: a larger down payment means a smaller loan and less interest, but keep 6–12 months of emergency funds after closing — renovation, furnishing and property fees arrive fast. Since 2024 the minimum down payment for first homes in most Chinese cities has been lowered to 15%, so the 15% row is realistic.
Term: 30 years minimizes the monthly payment (easier approval under income-to-debt rules) but maximizes total interest; 20 years cuts interest by roughly one third at a higher monthly. A common compromise: take 30 years for flexibility and prepay voluntarily when cash allows — you keep the option value.
Rate repricing: most commercial mortgages reprice on January 1 or the loan anniversary against the latest 5-year LPR. When LPR falls, your rate follows at the next repricing date without any action; housing-fund loans at 2.85% are usually the cheapest money you will ever borrow — use the fund loan quota first before commercial loans.
Equal payment vs equal principal — 1M at 3.6% over 30y
Method
Monthly
Total interest
Notes
Equal payment
4,546.45
636,723
Fixed every month; easiest budgeting
Equal principal
5,777.78 → 2,786.11
541,500
Front-heavy, tapering down
Same principal, same rate, same term: equal principal saves 95,223 in total interest — but the saving is earned with cash flow, not for free. Its first monthly runs 1,231 higher than the equal-payment line and only drops below it around month 148 (roughly 12 years in). If your early income can carry the front-load, equal principal is mathematically cheaper; if not, take 30 years of equal payment and prepay voluntarily — you keep the option value and land most of the same interest saving.
Combined loan vs pure commercial — 1M over 30y
Plan
Monthly
Total interest
Comparison
Pure commercial 3.45%
4,462.58
606,530
Baseline
Combined: 700K commercial + 300K fund 2.85%
4,364.48
571,213
Saves 35,317
Only 30% of the principal moves from 3.45% commercial to a 2.85% housing-fund loan, yet the 30-year interest saving reaches 35,317 — the fund loan is a rate subsidy you apply for. Check your city's fund loan caps and your contribution base first; if the quota covers even half of the principal, the combined route is nearly always worth the extra paperwork.