Calculate the final net price after a percentage discount, sales tax, shipping, and other fixed fees.
Net price is the amount paid after discount, modeled sales tax, shipping, and other fixed fees. The order matters: this calculator discounts the list price first and then applies tax to the discounted subtotal.
How to Use This Calculator
- Enter the list price.
- Enter the discount and sales-tax rates.
- Add shipping and fixed fees.
- Calculate and review each line of the price breakdown.
After a successful calculation, the inputs and result remain saved in this browser. Select Reset to clear the stored values and restore the calculator defaults.
How the Net Price Calculator Works
Sales-tax treatment of shipping, fees, coupons, and particular products varies by jurisdiction. The calculator is an invoice estimate, not a determination of taxable amount.
The primary relationship is Net price = list price × (1 − discount ÷ 100) × (1 + tax ÷ 100) + shipping + fees. Calculations retain full available precision internally; displayed values are rounded for readability.
Formula Variables and Input Guide
Enter the list price, discount, tax rate, shipping, and fixed fees. Tax is applied to the discounted subtotal in this model.
| Variable or term | Meaning | Unit or note |
|---|---|---|
| P | List price | currency |
| d | Discount rate | percent |
| S | Discounted subtotal | P × (1 − d ÷ 100) |
| t | Sales-tax rate | percent |
| N | Final net price | currency |
Choosing the Right Inputs
Enter the advertised list price and the single percentage discount applied by this model. Supply the sales-tax rate as a percent and add shipping and other fixed fees in the same currency. If an offer uses multiple sequential discounts, first determine their combined effect or calculate each remaining subtotal separately.
Confirm what the seller or jurisdiction treats as taxable. This calculator taxes the discounted merchandise subtotal and then adds shipping and fees without taxing those added charges. Coupons, rebates, delivery, services, and product exemptions can follow different rules, so use the checkout or an applicable tax authority when an exact transaction total is required.
Practical Uses
- Building an itemized checkout estimate.
- Comparing sale offers with different fees.
- Separating discount savings from sales tax.
- Checking the order used for discount and tax.
Invoice-style worked example
| Line | Amount |
|---|---|
| List price | $100.00 |
| 20% discount | −$20.00 |
| Discounted subtotal | $80.00 |
| 6% modeled tax | +$4.80 |
| Shipping and fees | +$7.00 |
| Net price | $91.80 |
Understanding Your Results
The final net price is itemized into savings, subtotal, estimated tax, and added charges.
The net price can be compared with a competing offer only when both calculations include the same taxes, shipping, fees, and coupon rules.
Worked Example
A $100 item with 20% off and 6% tax has an $80 subtotal and $4.80 tax, for $84.80 before shipping or fees.
Two successive discounts of 20% and 10% do not equal 30%. A $100 item becomes $80 and then $72, which is a 28% combined reduction before tax and fees.
Checking the Result by Hand
Calculate discount savings as list price × discount ÷ 100 and subtract it to obtain the discounted subtotal. Calculate modeled tax as that subtotal × tax rate ÷ 100, then add the subtotal, tax, shipping, and other fees. The itemized lines should sum exactly to the reported net price before display rounding.
Test a zero-discount case and a zero-tax case to isolate each component. At 100% discount, merchandise subtotal and merchandise tax should be zero in this model, although entered shipping or fees can leave a positive final total.
Common Mistakes to Avoid
- Applying tax before the discount when local rules tax the discounted amount.
- Adding successive discount percentages.
- Assuming shipping is always taxable or always exempt.
- Confusing net price with the pre-tax sale price.
Assumptions and Limitations
Tax rules vary by jurisdiction and may include or exclude shipping, fees, coupons, or specific products. Use the seller’s checkout total for an actual purchase.
Frequently Asked Questions
Is net price before or after tax?
In this calculator it is after modeled tax, shipping, and fees.
Is shipping taxable?
That depends on jurisdiction and transaction details.
How do two discounts combine?
Apply each to the remaining subtotal; do not simply add the rates.
What if the discount is 100%?
The item subtotal becomes zero, but shipping or fees may remain.
Sources
- California CDTFA: discounts and taxable selling price
- California CDTFA: tax treatment of shipping and delivery charges