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Estimate a monthly payment budget and the loan principal it supports from entered income, debt, down payment, term and interest rate.
Set the debt-payment share to match your own budget. The initial 50% is an editable example, not a universal lender limit.
Overview
Understand what the tool solves, how it works, and the boundaries of its data.
This calculator estimates an available monthly payment budget, the fixed-payment loan principal that budget could support, and a home-price scenario after adding the cash down payment you enter. All amounts are Chinese yuan (CNY), regardless of where you are using the English interface. This is a mathematical scenario for a China-focused CNY budget, not a US-dollar mortgage estimate or a lender decision.
Let I be monthly income, D existing monthly debt payments, and q your selected share of income. The new-loan payment budget is M = max(0, I × q − D), with q expressed as a decimal. For annual rate a percent, monthly rate r = a ÷ 1200; for T years, n = 12T monthly payments. At a positive rate, supported principal P = M × [1 − (1 + r)−n] ÷ r. At zero interest, P = M × n. The estimated price is P plus entered down payment. If existing debt is greater than the selected income allocation, M and P are zero.
The annuity calculation assumes the entered annual rate stays fixed and payments are equal and monthly. A standard fixed-rate principal-and-interest formula does not include every ownership or transaction cost.
Guide
Follow the workflow and verify inputs and outputs with practical examples.
Use full CNY amounts for both fields and keep your income basis consistent when comparing scenarios, such as using take-home income each time.
The down-payment field is in units of CNY 10,000. For example, enter 50 for CNY 500,000. The result converts it to full CNY.
Enter the loan term in years and the annual interest rate as a percent. Adjust the payment-share slider from 10% to 80%; its initial 50% is only a starting assumption, not a standard or recommended lender threshold.
Review the estimated home-price budget, supported loan principal, available monthly payment, and down-payment share. Copy the displayed summary if you want to compare it elsewhere.
Use cases
See how the tool fits into real work and everyday tasks.
For a rate comparison, keep income, existing debt, term, down payment, and payment share unchanged. For a debt-budget comparison, change only the payment share. This makes it easier to see which assumption changed the estimated principal instead of confusing several changes at once.
For a simple zero-interest illustration, monthly income of CNY 20,000, existing monthly payments of CNY 3,000, and a selected share of 40% produce a new payment budget of CNY 5,000. Over 20 years at 0%, that supports CNY 1,200,000 of principal. An input of 50 in the down-payment field adds CNY 500,000, for a scenario price of CNY 1,700,000. The zero rate is chosen only to make the arithmetic easy to follow; it is not a loan quote.
Q&A
Find concise answers to common questions and confusing cases.
No. It is an editable assumption used to set your own payment budget. The calculator does not review credit, income documents, property value, lender policy, or loan eligibility.
That input uses ten-thousand-CNY units. Income, existing debt, and displayed results use full CNY amounts.
The new monthly payment allowance is floored at zero, so the supported new principal is also zero. The estimated price then consists only of the entered down payment.
No. It models the payment budget and equal-payment loan principal. Taxes, insurance, fees, maintenance, and other recurring or one-time costs are outside that calculation.
Notes
Review scope, result limitations, and important precautions before use.
The result depends entirely on your entries and a simplified fixed-rate, equal-monthly-payment assumption. It does not account for lender underwriting, local eligibility rules, variable rates, fees, taxes, insurance, maintenance, moving costs, or household living expenses. The down-payment percentage is only the entered cash divided by the calculated scenario price; it is not checked against current regional or lender requirements.
Before making a purchase or borrowing decision in China, verify current terms with the relevant lender and account for your full household budget. A low or zero computed payment allowance is a consequence of the assumptions, not a judgment about your eligibility.
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