Sales Tax Calculator
Enter your pre-tax price, tax rate, and quantity to get tax amount, total with tax, and per-unit tax instantly. Toggle include shipping to add delivery to the taxable base, or switch to tax inclusive mode when your displayed price already includes tax.
Best for
Make the next pricing or planning decision with context
Set a tax or reserve scenario beside the operating result for your business scenario. It covers sales tax for invoices, checkouts, and product pricing with tax-inclusive or exclusive modes.
Instant calculations · Editable fee assumptions · Export-ready results
Inputs
Values update results instantly. Adjust fee assumptions to match your seller dashboard.
Your figures are saved in this browser on this device.
Pricing
Unit price before tax, or total if tax inclusive mode is on and quantity is 1.
Number of units.
Tax
Tax percent to apply. Common is 6% to 10% in US.
Add shipping to the taxable amount if your state taxes shipping.
Shipping total for this order.
Turn on if the amount you entered already includes tax and you want to extract tax.
Results
Live estimates based on your inputs and editable fee assumptions.
Pre-tax total
$49.99
Subtotal before tax, quantity times unit price plus shipping if included.
Tax rate
8.3%
Applied tax rate.
Tax amount
$4.12
Sales tax due on this order.
Total with tax
$54.11
Final amount customer pays.
Effective tax rate
8.3%
Actual tax percent on pre-tax total.
Per unit tax
$4.12
Tax per single unit.
What this means
Subtotal $49.99 plus 8.25% tax = $4.12 tax, total $54.11.
Sales tax breakdown
Interactive breakdown of fees, costs, and remaining profit.
Distribution
- Pre-tax$49.9992.4%
- Tax$4.127.6%
Total $54.11 · 2 segments · interactive
Line-item breakdown
Dollar amounts, share of revenue, and visual proportion.
- Pre-tax total
- $49.99
- Shipping
- $0.00
- Tax rate
- 8.3%
- Tax amount
- $4.12
- Total with tax
- $54.11
- Effective rate
- 8.3%
- Per unit tax
- $4.12
Assumptions used
- • Rate 8.25%
- • Shipping excluded from tax
- • Tax exclusive mode
Your next best moves
Use your Sales Tax result to make the next decision. These General Business tools follow the same cost and pricing thread.
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Download a practical checklist for pricing, hidden cost leaks, and healthier profit decisions alongside this result.
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Explore General BusinessSales Tax Calculator
Generated 9/9/2026, 5:55:25 PM · Currency USD
Inputs
- Amount before tax: 49.99
- Quantity: 1
- Sales tax rate: 8.25
- Include shipping in tax: false
- Shipping amount: 0
- Price includes tax: false
Results
- Pre-tax total: $49.99
- Shipping: $0.00
- Tax rate: 8.3%
- Tax amount: $4.12
- Total with tax: $54.11
- Effective rate: 8.3%
- Per unit tax: $4.12
Interpretation
Subtotal $49.99 plus 8.25% tax = $4.12 tax, total $54.11.
How it works
Methodology & formulas
This calculator is transparent by design. Review the steps and formulas so you can trust the estimate and adjust assumptions when your dashboard differs.
Calculation steps
- 1If tax exclusive, pre-tax total equals preTaxAmount times quantity plus shipping if included.
- 2Tax amount equals pre-tax total times tax rate percent divided by 100.
- 3Total with tax equals pre-tax total plus tax amount.
- 4If tax inclusive, pre-tax total equals total amount divided by one plus tax rate.
- 5Tax amount in inclusive mode equals total amount minus pre-tax total.
- 6Per unit tax equals tax amount divided by quantity.
Formulas
- Pre-tax total = unitPrice × quantity (+ shipping if enabled)
- Tax amount = preTaxTotal × taxRate%
- Total with tax = preTaxTotal + taxAmount
- If inclusive: preTaxTotal = totalAmount ÷ (1 + taxRate%)
- Per unit tax = taxAmount ÷ quantity
Important assumptions
- Tax rate is applied to pre-tax amount plus shipping when include shipping is enabled.
- When tax inclusive mode is on, the input amount is treated as total including tax.
- Quantity multiplies the unit price before shipping is added.
- This calculator does not handle compound taxes, VAT reverse charge, or mixed taxable and non-taxable items.
- Check your nexus rules for where you must collect tax.
Sources & review
Know what this estimate is built on
This calculator is intentionally platform-agnostic, so it does not attach a platform fee URL.
Official references
No single official fee page is attached here. The model keeps these inputs editable so you can use the terms that apply to your situation.
Use the current terms
This model uses editable planning assumptions. Confirm tax, payment, financing, or operating terms with the relevant provider, official authority, or adviser for your situation.
Defaults are editable estimates. Match them to your current account, provider statement, official authority, lender, or adviser before making a pricing or investment decision.
Calculator model reviewed: August 9, 2026. This date covers the page and calculator guidance, not a guarantee that every live platform rate or term was re-audited on that date.
Worked example
Single item with tax
$49.99 item, quantity 1, 8.25% tax, no shipping. Exclusive mode shows what customer pays.
FAQ
Common questions
Related guides
Read the guide behind the number
Use these practical guides to check the assumptions behind Sales Tax before you make the next decision.
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