What is the sales tax rate in Mountainside, New Jersey?

The combined sales tax rate in Mountainside, New Jersey is 6.600% as of 2026. This includes the New Jersey state rate of 6.600% plus local jurisdiction taxes.

How is the Mountainside sales tax calculated?

Multiply your purchase amount by 6.600% (or 0.00660) to get the tax owed. For example, a $100 purchase incurs $6.60 in sales tax.

What is the New Jersey state sales tax rate?

The base New Jersey state sales tax rate is 6.600%. Local jurisdictions may add additional taxes on top of this rate.

Does Mountainside have a county sales tax?

Mountainside does not levy an additional county-level sales tax beyond the state base rate.

When was the Mountainside sales tax rate last updated?

The Mountainside sales tax rate was last verified on March 27, 2026. We cross-reference all rates against the official State Department of Revenue data.

Live Data: April 2026

Mountainside, NJ Sales Tax Rate 2026

The combined sales tax rate in Mountainside, New Jersey is 6.600%.

Combined Rate 6.600%

State6.600%

Mountainside Sales Tax Breakdown

Jurisdiction	Rate
New Jersey State Sales Tax	6.600%
Total Combined Rate	6.600%

Which County Is Mountainside In?

Mountainside falls within Union, New Jersey. Union imposes a 0.000% county-level sales tax in addition to the New Jersey state base rate.

Mountainside ZIP Codes

The following ZIP codes are mapped to Mountainside for sales tax purposes. All listed codes apply the 6.600% combined rate.

07092

Nearby Tax Rates

Combined Rate

Combined Rate

New Providence 2.6 mi

6.600%

Combined Rate

View Local Rates

Business Nexus in New Jersey

Economic Nexus Threshold

Selling into New Jersey from out of state? Once you exceed $100,000 in annual sales or 200 transactions, you must register and collect New Jersey sales tax.

FAQ: Mountainside Sales Tax

The combined sales tax rate in Mountainside, New Jersey is 6.600% as of 2026.

Multiply your purchase price by 6.600% to find the tax owed. A $500 purchase would include $33.00 in sales tax.

Groceries are generally taxable in New Jersey. Check the official Department of Revenue for specific exemptions.

Vehicle purchases in Mountainside are subject to the 6.600% combined rate, though some states apply different rules for vehicle sales. Verify with the New Jersey Department of Revenue or DMV.

Register for a sales tax permit through the official New Jersey Department of Revenue website. Registration is typically free and required before collecting any sales tax.

Sales Tax Calculator

Using 6.600% rate for Mountainside, NJ

Purchase Amount ($)

Tax Amount $0.00

Total with Tax $100.00

Rate applied: 6.600% combined

Official Tax Authority

New Jersey Division of Taxation

Filing Deadline: Monthly returns due the 20th of the following month. File via NJ Online Tax Filing.

Visit Official Portal (609) 292-6400