New Mexico Construction Project Tax Calculator
Estimate Gross Receipts Tax (GRT) and total tax obligations for construction projects in New Mexico, including contractor deductions and applicable local option rates.
Formula
Taxable Receipts = Contract Value − Material Cost Deduction − Licensed Subcontractor Payment Deduction (General Contractors only)
Gross Receipts Tax (GRT) = Taxable Receipts × Effective GRT Rate
Effective GRT Rate = State Base Rate (5.125%) + County Rate + Municipal Rate (combined; varies by jurisdiction)
Compensating Tax = Out-of-State Material Cost × Effective GRT Rate (advisory only; not auto-calculated)
Assumptions & References
- New Mexico imposes a Gross Receipts Tax (GRT) — not a sales tax — on the seller (contractor). The state base rate is 5.125% (effective July 1, 2022, per HB 6, 2022 NM Legislature).
- Local option rates (county + municipal) vary; combined rates range from approximately 5.125% to 9.5625% statewide. Rates shown are representative county-level estimates. Verify current rates at the NMDOT Tax & Revenue Department.
- Contractors may deduct the cost of materials on which New Mexico GRT was already paid at purchase, under NMSA 1978 § 7-9-52.
- General Contractors may deduct amounts paid to licensed New Mexico subcontractors under NMSA 1978 § 7-9-52. Subcontractors are then responsible for GRT on their own receipts.
- Construction services sold to New Mexico governmental entities are exempt under NMSA 1978 § 7-9-54; sales to federally recognized tribes may be exempt under NMSA 1978 § 7-9-47.
- Compensating Tax applies to materials purchased out-of-state without paying NM GRT, at the same effective rate, under NMSA 1978 § 7-9-7.
- This calculator provides estimates only. Actual tax liability depends on specific project location, contract structure, and current NMDOT rate tables. Consult a licensed New Mexico CPA or tax attorney for compliance.
- Reference: New Mexico Taxation & Revenue Department — tax.newmexico.gov