This NJ sales tax calculator adds New Jersey’s 6.625% sales tax to a price, or works backward from a receipt to show how much of the total was tax. It is useful for shop owners pricing items, contractors writing invoices and anyone checking a bill.
How to use the calculator
- What do you have? Choose Price before tax (add tax) to add tax, or Total with tax (reverse) to take it out of a total.
- Amount: the price or the total, in dollars.
- Rate: New Jersey standard rate (6.625%), NJ Urban Enterprise Zone (3.3125%), or another rate.
- Your rate: appears when you pick another rate, for example to check a sale taxed in a different state.
How it is calculated
- Adding tax: tax = price × rate, rounded to the cent. Total = price + tax.
- Reverse sales tax: price before tax = total ÷ (1 + rate), rounded to the cent. Tax = total − price before tax.
The standard rate is set by the New Jersey Division of Taxation: 6.625% on most sales of tangible personal property, specified digital products and certain services unless exempt. The reduced Urban Enterprise Zone rate is 3.3125%.
Worked example with the default inputs
| Add tax to $100 | Reverse tax out of $100 | |
|---|---|---|
| Price before tax | $100.00 | $93.79 |
| Sales tax at 6.625% | $6.63 | $6.21 |
| Total with tax | $106.63 | $100.00 |
At the UEZ rate, the same $100 price carries $3.31 of tax, for a total of $103.31.
What this calculator leaves out
- Whether the item is taxable. The calculator applies the rate you pick; our NJ sales tax guide lists common taxable and exempt goods and services. In New Jersey most groceries, most clothing and footwear, household paper products, and prescription and over-the-counter drugs are exempt, while prepared food, candy and soft drinks are taxable (sales tax guide, S&U-4).
- Who may use the UEZ rate. Only certified sellers, on qualifying sales in the zone. Motor vehicles, energy, telecommunications and utility services do not get the reduced rate.
- Use tax on items bought without New Jersey tax, which the buyer owes at the same rate.
- Invoice rounding. Tax here is rounded once on the amount you enter. If your system rounds each line separately, totals can differ by a cent or two.
- Marketplace sales. Sales made through a marketplace such as Amazon or Etsy are generally taxed by the marketplace, not by you.
Reverse sales tax: taking tax out of a total
The most common mistake with tax-included totals is multiplying the total by the rate. On a $100 receipt, 6.625% of $100 is $6.63, but the real tax is $6.21, because the $100 already contains the tax. The correct base is the price before tax, which you get by dividing:
| Total paid | Price before tax (total ÷ 1.06625) | Tax included |
|---|---|---|
| $100.00 | $93.79 | $6.21 |
| $1,000.00 | $937.87 | $62.13 |
| $5,000.00 | $4,689.33 | $310.67 |
This matters in the books. When a register report or a deposit shows only gross receipts, backing the tax out correctly keeps sales and sales tax payable separate, and the ST-50 return then matches what you collected. Overstating the tax by the multiplication shortcut means you report and pay more than you owe; understating it leaves a gap the state will eventually ask about.
Filing what you collect
The rate is the easy part. The work is tracking taxable and exempt sales, filing a quarterly ST-50 even in quiet quarters, and making monthly payments if your business crosses the threshold. Our NJ sales tax filing service prepares those returns from reconciled sales data, and our monthly bookkeeping keeps sales tax payable separate from revenue all year. For other quick numbers, try our free business calculators. If you are not sure your business is collecting the right amount, book a free 15 to 30 minute consultation.