Invoice Calculator
Build an invoice total with tax, discount, shipping and early-payment terms.
What the Invoice Calculator does
An invoice total applies the discount first, adds shipping, then charges tax on the combined amount. Early-payment terms offer a small discount for fast settlement — valuable to the seller's cash flow and expensive credit for the buyer to decline.
Formula
Net goods = Subtotal − DiscountTaxable = Net goods + ShippingTotal = Taxable + TaxBalance due = Total − Deposit
Inputs explained
| Input | Unit | Required | Notes |
|---|---|---|---|
| Subtotal | selected currency | Yes | Accepts more than 0. |
| Discount | % | Optional | — |
| Tax rate | % | Optional | — |
| Shipping or handling | selected currency | Optional | Accepts 0 or more. |
| Early payment discount | % | Optional | For example 2% if paid within 10 days. |
| Deposit already paid | selected currency | Optional | Accepts 0 or more. |
| Currency | one of 10 options | Optional | — |
How to use it
- Choose Currency.
- Enter Subtotal.
- Optionally add Discount, Tax rate and Shipping or handling.
- Select Calculate.
Worked example
A $8,500 subtotal with a 5% discount, $150 shipping, 8% tax and a $2,000 deposit.
- Subtotal
- 8500
- Discount
- 5
- Shipping
- 150
- Tax
- 8
- Deposit
- 2000
Net goods $8,075, taxable $8,225, tax $658, total $8,883 — balance due $6,883.
Frequently asked questions
What does "2/10 net 30" mean?
Take 2% off if you pay within 10 days; otherwise the full amount is due in 30. Skipping the discount to delay 20 days costs roughly 36% a year.
Is tax charged on shipping?
In most jurisdictions yes, when the goods themselves are taxable. Rules vary, so confirm locally.