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Live Data: April 2026

Newcastle, OK Sales Tax Rate 2026

The combined sales tax rate in Newcastle, Oklahoma is 10.000%.

Combined Rate 10.000%
State4.500% County0.500% City5.000%

Newcastle Sales Tax Breakdown

Jurisdiction Rate
Oklahoma State Sales Tax 4.500%
County Sales Tax 0.500%
City / Municipal Tax 5.000%
Total Combined Rate 10.000%

Which County Is Newcastle In?

Newcastle falls within McClain, Oklahoma. McClain imposes a 0.500% county-level sales tax in addition to the Oklahoma state base rate.

Newcastle ZIP Codes

The following ZIP codes are mapped to Newcastle for sales tax purposes. All listed codes apply the 10.000% combined rate.

73065

Business Nexus in Oklahoma

Economic Nexus Threshold

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

FAQ: Newcastle Sales Tax

The combined sales tax rate in Newcastle, Oklahoma is 10.000% as of 2026.
Multiply your purchase price by 10.000% to find the tax owed. A $500 purchase would include $50.00 in sales tax.
Groceries are generally taxable in Oklahoma. Check the official Department of Revenue for specific exemptions.
Vehicle purchases in Newcastle are subject to the 10.000% combined rate, though some states apply different rules for vehicle sales. Verify with the Oklahoma Department of Revenue or DMV.
Register for a sales tax permit through the official Oklahoma Department of Revenue website. Registration is typically free and required before collecting any sales tax.

Sales Tax Calculator

Using 10.000% rate for Newcastle, OK

$
Tax Amount $0.00
Total with Tax $100.00

Rate applied: 10.000% combined

Official Tax Authority

Oklahoma Tax Commission

Filing Deadline: Monthly returns due the 20th of the following month. File via OkTAP.

Visit Official Portal (405) 521-3160