Gaithersburg, Maryland Sales Tax Calculator (2026)
6.00% total combined rate — includes state and local taxes.
Gaithersburg businesses apply Maryland’s standard 6% statewide rate, with no local adjustments.
Gaithersburg Sales Tax Calculator
Enter a purchase amount — we’ll calculate the total with Gaithersburg’s tax rate.
Rate
6.00%
Tax
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Total
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The current combined rate for Gaithersburg is 6.00%.
Gaithersburg Sales Tax Breakdown
- State Rate: 6.00%
- City Rate: 0.00%
- County Rate: 0.00%
- Special Rate: 0.00%
- Total: 6.00%
About Gaithersburg
Gaithersburg’s retail and tech sectors collect the 6% state sales tax, helping fund statewide education and infrastructure projects.