Construction Subcontractor Tax Calculator
The general contractor pays the invoice in full and withholds nothing. Tools, truck, fuel and materials come out of it, and so does a tax bill nobody set aside for.
Subcontractors tax estimate
Estimated taxes
Tax estimates are based on the selected tax year.
$0
total estimated tax
Where the tax goes
- Federal income tax $0 0%
- Self-employment tax $0 0%
- State income tax $0 0%
| Line | Amount |
|---|---|
| Gross business income | $0 |
| Business deductions | $0 |
| Net business profit | $0 |
| Other taxable income | $0 |
| Deduction for half of self-employment tax | $0 |
| Standard deduction | $0 |
| Taxable income | $0 |
| Self-employment tax | $0 |
| Federal income tax | $0 |
| State income tax | $0 |
| Total estimated tax | $0 |
| Already paid | $0 |
| Still due | $0 |
| Estimated take-home | $0 |
- Net earnings for SE tax$0
- Marginal rate0%
- Adjusted gross income$0
- Tax year—
Quarterly estimated tax
1099 workers generally do not have an employer withholding federal income tax and self-employment tax from their payments, so estimated tax payments may be required.
Estimated annual tax $0 Estimated quarterly payment $0
Whether you need to pay, and how much, depends on your full year. The IRS explains the rules and the due dates in Estimated taxes and in Form 1040-ES.
Show the math
What this estimate leaves out
Tax returns carry things this estimator does not model. If any of these apply to you, your real bill will differ:
This calculator provides an estimate for educational purposes and is not tax, legal, or financial advice. Your actual tax liability may differ based on your complete tax situation.
How taxes work for construction subcontractors
Materials you supply are income first and a deduction second
If you invoice a general contractor for labour and materials, the whole invoice is your income — and it will be on the 1099 that way. The materials are then a deductible cost. Subs who mentally treat the material element as a pass-through and report only their labour are understating income against a form the IRS already holds. The two approaches give the same tax if the deduction is claimed properly, but only one of them matches the paperwork. Keep supplier invoices tied to jobs; on a big year the materials figure is large enough that an unsupported number is a problem.
Tools: expensed, spread, or somewhere in between
Consumables and small tools — blades, bits, abrasives, a $180 nail gun — are ordinary running costs deducted in the year you buy them. Substantial equipment with a life of several years is normally capitalised and written off across that life, though elections exist that can let you deduct much more of it immediately, which is often worth doing in a strong year and worth not doing in a weak one. That choice has real consequences for a trade with lumpy income, so it is the sort of thing to decide with an accountant in December rather than discover in April.
If you pay your own subs, you have filing obligations too
A sub who hires other subs is a payer as well as a payee. Pay an unincorporated individual or partnership $600 or more in a year for services and you generally have to issue them a 1099-NEC and file a copy, which means collecting a W-9 before you pay them rather than chasing one in January. There are penalties for not filing, and the deduction for what you paid them is far easier to defend when the paperwork exists. This catches out subs who grow: the first year you put two people on a job is the year the obligation appears.
The truck is the deduction most often got wrong
You choose between the standard mileage rate and actual costs, and for a heavily loaded work truck with poor fuel economy and high running costs the actual-expense method often wins — the opposite of the usual gig-economy answer. Actual costs means the business share of fuel, insurance, repairs, tyres, registration, loan interest and depreciation, which needs proper records. The standard rate needs only a mileage log. Compare both in the first year you use a vehicle for the business, because switching later is restricted, and a dedicated work truck used only for work simplifies the question enormously.
The method is the IRS order of operations, written out step by step on the 1099 tax calculator.
Tax estimates are based on the selected tax year.
What construction subcontractors can deduct
The trades carry heavy, genuine costs and the deductions are correspondingly large. Every item below reduces self-employment tax as well as income tax.
- Materials and supplies
- Everything bought for jobs, tied to the invoices that billed them on.
- Vehicle costs
- Either the standard mileage rate on a log, or the business share of fuel, insurance, repairs, tyres, registration and depreciation. One method, not both.
- Small tools and consumables
- Blades, bits, abrasives, fixings and the hand tools that wear out. Deducted in the year bought.
- Large equipment
- Compressors, mixers, lifts, trailers. Normally spread over their useful life, subject to the elections available to accelerate it.
- Tool and equipment rental
- Hired plant for a specific job, including delivery and fuel surcharges.
- Subcontractors you pay
- Deductible, and generally requiring a 1099-NEC at $600 or more. Collect the W-9 before you pay, not after.
- Licensing, permits and bonding
- Trade licences, contractor registration, permit fees and any bond your work requires.
- Liability and workers compensation insurance
- General liability, tool cover, and workers comp where you carry it.
- Safety equipment and PPE
- Boots, hard hats, harnesses, respirators, gloves and hearing protection. Replaced constantly and rarely tracked.
- Work clothing that is not street wear
- High-visibility, fire-resistant and branded workwear. Ordinary jeans are not deductible however ruined they get.
- Dump and disposal fees
- Skip hire, tip fees and haulage on a job you cleared.
- Phone, plan and job management software
- The business share of the phone, plus estimating, invoicing and scheduling tools.
Deductions reduce both your federal income tax and your self-employment tax, so a dollar of legitimate business expense is worth more to you than a dollar of personal saving. Keep the record at the time you spend, not in April.
A worked example: a two-man trim crew filing jointly
Married filing jointly for the 2026 tax year in South Dakota, which has no tax on earned income. Income is the full invoiced amount including materials, with the materials, truck, tools and insurance deducted as costs. One spouse works in the business; no other household income.
| Gross invoiced | $88,000.00 | Everything billed to general contractors across the year, labour and materials together. |
|---|---|---|
| Business expenses | $31,000.00 | Materials, truck running costs, tools, PPE, licensing, liability insurance and disposal fees. |
| Gross business income | $88,000.00 | Everything the work brought in, before any costs. |
|---|---|---|
| Business deductions | $31,000.00 | What comes off before the tax is worked out. |
| Net profit | $57,000.00 | Gross less deductions. This, not the gross, is what the tax is built on. |
| Net earnings from self-employment | $52,639.50 | 92.35% of net profit, which is how the IRS defines the base for self-employment tax. |
| Self-employment tax | $8,053.85 | 15.3% of that base: 12.4% social security to the annual wage base, 2.9% Medicare with no ceiling. |
| Half the SE tax, deducted | $4,026.93 | The employer half comes off income before income tax is worked out. |
| Adjusted gross income | $52,973.07 | Net profit and other income, less that half-SE deduction. |
| Standard deduction | $32,200.00 | The published figure for this filing status and tax year. |
| Taxable income | $20,773.07 | What the federal rate table is applied to. |
| Federal income tax | $2,077.31 | From the published brackets, charged slice by slice. |
| State income tax | $0.00 | Only calculated where the state has no tax on earned income. |
- Total estimated tax $10,131.16
- Take-home $46,868.84
- Effective rate 17.77%
- Each quarterly payment $2,532.79
Invoicing $88,000 leaves $57,000 of profit, and the joint standard deduction of $32,200 absorbs a large part of the income tax — $2,077.31 in the end. Self-employment tax of $8,053.85 is unaffected by that deduction and is the larger number, which is the pattern in almost every trade. Total $10,131.16, or $2,532.79 a quarter.
Run your own figures through the calculator above — the numbers here are an illustration, not a benchmark.
Subcontractors tax questions
Do I report materials I billed to the contractor as income?
Yes, and then deduct what they cost you. If your invoice covered labour and materials, the whole invoice is income and will appear that way on the 1099 the contractor files. Reporting only your labour creates a mismatch with a form the IRS already has. Report the gross and claim the materials as a cost, supported by supplier invoices tied to the job. The tax works out the same and the paperwork agrees, which is what stops a letter arriving.
Do I have to give 1099s to the subs I pay?
Generally yes, for an unincorporated individual or partnership you paid $600 or more for services in the year. You issue them a 1099-NEC and file a copy. The practical part is getting a W-9 from anyone before you pay them the first time — chasing a tax identification number in January from someone who has moved on is a familiar and avoidable problem. Penalties apply for not filing, and the deduction for what you paid is far easier to stand behind when the forms exist.
Should I use mileage or actual expenses for my work truck?
Compare both, because the trades are the case where actual expenses often wins. A loaded work truck with poor fuel economy, heavy tyre wear and high insurance can cost more per mile to run than the standard rate allows, in which case deducting the business share of actual fuel, insurance, repairs, registration, interest and depreciation gives a larger deduction. It needs proper records, where the standard rate needs only a log. Decide in the first year you use the vehicle for the business, as switching afterwards is restricted — and a truck used only for work makes the whole question much simpler.
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