How to Calculate Sales Tax Backwards: Pre-Tax from Total
Learn the correct formula to calculate sales tax backwards. Find the pre-tax price from any tax-inclusive total without making the common subtraction mistake.
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Expert articles on reverse tax calculation, state rates, bookkeeping, and everything you need to handle sales tax with confidence.
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Sales Tax Rates by State in 2026: Complete Guide
Current sales tax rates for all 50 US states in 2026, including combined state and local averages. Find your rate and learn what affects it.
Tax-Inclusive vs Tax-Exclusive: What's the Difference?
Tax-inclusive means tax is already in the price. Tax-exclusive means tax is added at checkout. Learn how each works and when reverse calculation matters.
7 Sales Tax Mistakes Small Businesses Make (and How to Fix Them)
Sales tax errors are among the most costly mistakes small businesses make. The most common ones, and how to avoid or correct each.
How Sales Tax Works in the US: A Plain-English Guide
Sales tax in the US is set at state and local levels, added at the register, and remitted by sellers. Here's how the whole system works, simply explained.
Reverse Tax Calculation Examples: Real Scenarios Solved
Worked reverse tax calculation examples for receipts, VAT invoices, reimbursements, and e-commerce, with actual numbers you can verify.
Do You Pay Sales Tax on Online Purchases? State Rules
Since the 2018 Wayfair ruling, most online purchases include sales tax. Learn which states collect it, how marketplace facilitator laws work, and what you owe.
How to Verify the Tax on Your Receipt Is Correct
Retailers occasionally charge the wrong sales tax rate. Here's how to verify your receipt in under two minutes, with the formula and a free calculator.
Sales Tax vs VAT: Key Differences Explained
Sales tax and VAT both tax consumption, but they work very differently. Learn how each is calculated, collected, and why the same reverse formula works for both.
Sales Tax for Freelancers: What You Actually Need to Know
Most freelancers don't charge sales tax, but some must. Learn which services are taxable, when you have nexus, and how to handle tax-inclusive client payments.