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.
Instant calculations · Editable fee assumptions · Export-ready results
Inputs
Values update results instantly. Adjust fee assumptions to match your seller dashboard.
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
Share or export this calculation
Copy your numbers, save as PDF, or share with your team and seller communities.
Continue with related tools
These calculators pair well with Sales Tax and help you get a complete picture.
Check your margins
Profit Margin
Calculate gross and net profit, margin, markup, and break-even price from your real product costs and selling price.
Running a sale?
Discount
See how discounts, coupon codes, and fees affect final price, savings, and effective discount.
You might also need
Markup
Convert product cost and markup percent into a selling price, and see markup versus margin instantly.
Project your revenue
Revenue
Project gross, net, and recurring revenue from price, volume, refunds, fees, and subscriptions.
Get more free tools like this
We'll send you new calculators, tips, and updates. No spam, unsubscribe anytime.
Sales Tax Calculator
Generated 7/29/2026, 2:51:58 AM · 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.
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 tools
Continue planning
Profit Margin Calculator
Calculate gross and net profit, margin, markup, and break-even price from your real product costs and selling price.
Discount Calculator
See how discounts, coupon codes, and fees affect final price, savings, and effective discount.
Markup Calculator
Convert product cost and markup percent into a selling price, and see markup versus margin instantly.
Revenue Calculator
Project gross, net, and recurring revenue from price, volume, refunds, fees, and subscriptions.
Future recommendations
Tools worth comparing later
This section is reserved for editorial affiliate recommendations. Nothing here is a live endorsement or paid placement yet.
Accounting
Bookkeeping software for product sellers
Track fees, COGS, and payouts in one place.
Link coming later
Email marketing for repeat buyers
Useful after you have a list and offer flow.
Link coming later
Print on demand
POD partners and mockup tools
Compare base costs before you launch designs.
Link coming later
Platform roadmap
Explore More Seller Tools
We are building a complete business decision platform. These planning and forecasting tools are coming next — each will reuse the same transparent, seller-focused framework.
Profit Planner
Set monthly income goals and work backward to required sales, pricing, and margin targets.
Inventory Planner
Calculate reorder points, inventory investment, and stockout risk before you place POs.
Pricing Optimizer
Test pricing scenarios to find the sweet spot between conversion and profit per order.
ROI Planner
Model return on ads, influencer campaigns, and marketplace promotions.
Business Goal Planner
Turn annual revenue goals into daily sales targets, listing counts, and traffic needs.
Sales Forecast
Project next quarter revenue from current average order value and growth assumptions.
Pricing Strategy Tool
Compare charm pricing, premium pricing, and anchor strategies on the same product.
Product Launch Calculator
Budget a new product launch including samples, fees, ads, and break-even timeline.