Home buying and renovation costs can quickly exceed your budget when dozens of seemingly small expenses add up. Beyond the down payment, you need to account for deed tax and transaction fees, compare commercial mortgages, Housing Provident Fund loans, and combination loans, then calculate usable floor area, shared common areas, paint, and tile requirements once you have the floor plan.
Here are 12 calculators for planning home purchases, mortgages, taxes, floor areas, and renovation materials. Use them to create a complete preliminary budget, then compare the results with your bank’s loan offer, purchase contract, and contractor quotes.
Home purchase restrictions, Housing Provident Fund lending rules, tax incentives, and transaction procedures vary by city. Material waste also depends on the layout and installation method. These online results are intended for estimates and comparisons. Before signing a contract, confirm the figures with local authorities, your bank, and qualified contractors.
1. Start With Cash Flow to See What You Can Afford
1. Home Affordability Calculator
The Home Affordability Calculator estimates an affordable home price or monthly mortgage payment based on household income, existing debt, down payment, and loan terms. Avoid putting every dollar of monthly disposable income toward the mortgage—leave room for living expenses, renovations, and emergencies.
2. Mortgage Calculator
The Mortgage Calculator compares equal principal-and-interest payments with equal principal payments, including monthly payments, total interest, and how payments change over time. Equal principal-and-interest payments are more consistent at the beginning, while equal principal payments start higher but usually result in less total interest. Choose based on the stability of your income.
3. Housing Provident Fund Loan Calculator
The Housing Provident Fund Loan Calculator estimates monthly payments and total interest for a Housing Provident Fund loan. Your actual borrowing limit, down payment requirement, loan eligibility, and term depend on local policies and your contribution history—not simply the amount you want to borrow.
4. Combination Loan Calculator
The Combination Loan Calculator calculates the Housing Provident Fund and commercial mortgage portions separately, then combines them to show the total monthly payment and borrowing cost. Make sure the interest rate, term, and repayment method for each portion match the bank’s offer.
5. Mortgage Early Repayment Calculator
The Mortgage Early Repayment Calculator compares options such as shortening the loan term or lowering monthly payments and estimates the interest savings. Whether early repayment makes financial sense also depends on your contract, prepayment penalties, remaining term, and other uses for your household funds.
6. Social Insurance and Housing Fund Calculator
The Social Insurance and Housing Fund Calculator shows monthly Housing Provident Fund contributions, providing useful data for estimating your account balance and loan eligibility. Enter the employer and employee contribution rates and contribution-base limits required by local regulations.
2. Include Taxes and Fees for New and Resale Homes
7. Property Deed Tax Calculator
The Property Deed Tax Calculator estimates deed tax based on the property price, floor area, and the household’s existing home ownership. The applicable rate may depend on whether the property is the household’s only home or second home and whether its floor area exceeds the policy threshold.
8. Resale Property Tax and Fee Calculator
The Resale Property Tax and Fee Calculator brings together common taxes and fees for resale home transactions, helping buyers and sellers plan ahead. The final amount can vary based on how long the property has been owned, the number of homes owned by the household, the assessed taxable value, and local implementation rules.
3. Calculate Floor Areas and Materials From the Floor Plan
9. Shared Common Area Calculator
The Shared Common Area Calculator explains the relationship between gross floor area, internal floor area, and allocated common area. When reviewing a development, compare the internal usable space and efficiency rate—not just the gross floor area shown in sales materials.
10. Room Measurement Calculator
The Room Measurement Calculator records each room’s length, width, and height, then totals floor and wall areas. Whether you should subtract doors, windows, built-in cabinets, and irregular spaces depends on the specific renovation work.
11. Paint Calculator
The Paint Calculator estimates the primer and topcoat required based on the surface area, number of coats, and product coverage. Wall condition, application method, and manufacturer specifications affect actual usage, so include a reasonable waste allowance when purchasing paint.
12. Wall Tile Calculator
The Wall Tile Calculator estimates the number of tiles needed from the installation area, tile dimensions, and waste percentage. Straight, diagonal, and patterned layouts—as well as irregular spaces—have very different waste rates, so do not treat the theoretical quantity as your final order quantity.
Organize Your Budget Into Three Worksheets
Use the first worksheet for the down payment, deed tax, and transaction fees; the second for commercial mortgages, Housing Provident Fund loans, monthly payments, and total interest; and the third for room-by-room internal areas, primary materials, and waste allowances. This makes it easy to see whether an overrun comes from the purchase price, financing costs, or renovation materials.
China’s current property transaction tax policies apply different conditions based on the number of homes a household owns and the property’s floor area. The property market tax policy announcement issued by the Ministry of Finance and other authorities provides a national reference, but you should still check the latest local rules for Housing Provident Fund loan limits, down payment requirements, and related policies.
Save this calculator collection before buying or renovating a home. Run the numbers again before signing, applying for a mortgage, and ordering materials to reduce last-minute budget surprises.