Business & Tax
26 free online calculators — instant results, no sign-up
All 26 Business & Tax Tools
VAT Calculator
Add or remove value-added tax, input creditPrice Tax Separator
Tax-inclusive price, net price and tax amountInvoice Amount Calculator
Gross amount with tax for invoicingProfit Margin Calculator
Gross/net profit and margin rateGross Margin Calculator
Gross margin vs markup rateDepreciation Calculator
Straight-line and double-declining balanceBreak-Even Calculator
Fixed cost, variable cost and break-even volumeMarkup Calculator
Cost to selling price by markup rateNEWCommission Calculator
Sales amount × commission rateAnnualized ROI Calculator
Return, investment and days to annualized rateAd Performance Calculator
Full funnel: CPM, CPC, CTR, CVR, CPA and ROASRMB Uppercase Converter
Numbers to formal Chinese financial uppercase amountsEmployer Cost Calculator
True company cost of a salary incl. social insuranceEquity Dilution Calculator
Founder ownership across multiple funding roundsCAC & LTV Calculator
Customer acquisition cost, lifetime value, 3:1 ruleEnterprise Income Tax Calculator
China EIT — small enterprise 5%, high-tech 15%, standard 25%Inventory Turnover Calculator
Turns, days sales of inventory and benchmarksE-commerce Profit Calculator
Full cost breakdown, break-even priceContainer Loading Calculator
Max boxes per 20GP/40GP/40HQ/45HQConversion Rate Calculator
Funnel CTR/CVR/overall, AOV revenuePromotion Compare Calculator
Full cut, 2nd-half-price vs direct discountEOQ Calculator
Economic order quantity, orders per year, total costUPS Runtime Calculator
Runtime from battery capacity and loadVideo Ad Revenue
Creator revenue from views and RPM across platforms, with monthly projections.Sponsorship Pricing
Fair sponsorship quote from follower count and niche factor, with integration, dedicated and special tiers.Meeting Cost Calculator
True cost of a meeting: headcount × hourly rate × duration.Related Guides
Take-Home Pay: Social Insurance, Housing Fund & Income Tax
Gross ¥10,000/month takes home roughly ¥7,500–8,000 after social insurance (~10.5%), housing fund (5–12%) and income tax. Includes the full deduction formula, 2025 social insurance base caps, special additional deductions and year-end bonus tax strategy.
Resale Home Taxes: VAT, Income Tax & Deed Tax Explained
Selling a resale home: VAT 5.3% if under 2 years (exempt after 2 years in most cities), income tax 1% of price or 20% of gain (exempt if owned 5+ years and only home), deed tax 1–3% paid by buyer. Includes the "满二/满五唯一" exemption rules and real cost tables.
Price-Tax Split: Net Price, VAT & Gross Calculation
Net = gross ÷ (1 + tax rate); tax = gross − net. ¥113 with 13% VAT → net ¥100, tax ¥13. Covers the 13%/9%/6%/3%/1% rate table, why "gross × rate" is wrong, and invoicing rules for general vs small taxpayers.
Small-Scale Taxpayer VAT: 1% Rate, Filing & Thresholds
Small-scale taxpayers pay 3% collection rate, temporarily 1% through 2027; monthly sales ≤¥100k (quarterly ≤¥300k) are fully exempt. Covers the exemption rules, when to issue special invoices, the general-taxpayer decision, and common filing traps.
Corporate Income Tax: 25% Rate, Preferences & Filing
Standard CIT rate is 25%; small low-profit enterprises pay an effective 5% on the first ¥3M of profit; high-tech enterprises 15%. Covers taxable income adjustments, the small-enterprise thresholds, R&D super-deduction, and quarterly prepayment rules.
ROI: Return on Investment Formula & Annualized Returns
ROI = (gain − cost) ÷ cost × 100%. $10k → $13k = 30% ROI. But ROI ignores time — annualize it: (1+ROI)^(1/years) − 1. 30% over 3 years = 9.14%/year. Includes worked examples across stocks, property and business decisions.