There are two kinds of date on a contractor's calendar.
The first kind is published. Returns, estimated payments, information filings. Miss one and there is a penalty, but nobody is confused about what was required. Software reminds you. Your preparer reminds you.
The second kind has no deadline attached at all, and it is where the money is. Whether the method you are on is the right one. Whether that equipment lands this year or next. Whether certified payroll was set up before the first public job started rather than after the first pay application was held. Nothing enforces these dates, which is exactly why they get missed.
Q1: Close the Year, Then Decide the Method
- Information returns to subcontractors and the IRS. Reconciled against what you actually paid, which is easier where W-9s were collected at onboarding rather than chased now.
- Payroll year-end filings and W-2s.
- Q1 estimated payment, based on a realistic view of the year rather than last year's number carried forward.
The decision with no deadline: your accounting method. Whether you still qualify for the small contractor exception depends on averaged gross receipts, and a contractor can grow past it without anything announcing it. A change is made formally on Form 3115 and applies to a tax year, so this is a January conversation, not a March one. See accounting methods for contractors.
Q2: File, Then Look Forward
- Business and personal returns, or extensions. An extension extends the filing, not the payment.
- Q2 estimated payment.
- Look-back interest on Form 8697 where a long-term contract closed and the estimates moved enough to require it. It runs in both directions and can produce a refund.
This is also the natural point to revisit the estimates underneath your work-in-progress schedule. Percent complete is only as good as your estimate of total cost, and estimates set at bid time drift as the job runs.
Q3: The Quarter Where Planning Still Works
Almost everything worth doing about this year's tax position has to happen now, because by December most of the levers have already moved.
- Q3 estimated payment, recalculated against how the year is actually running rather than how it was projected.
- Equipment timing. The deduction generally depends on when the asset is placed in service, not when it was ordered. A machine that slips across the year end lands in a different tax year. Decide deliberately while there is still time to influence it.
- Retirement plan decisions. Some plans have to exist before year end to be usable for the year, and the setup is not instant.
- Entity and compensation review, while there is a full quarter to implement anything it suggests.
Q4: Execute, and Get the Schedule Ready
- Q4 estimated payment, with the year now largely known.
- Execute the Q3 decisions. Place equipment in service, fund what needs funding, complete plan setups.
- Collect the outstanding compliance documents while subcontractors still have a reason to respond to you.
- Prepare the work-in-progress schedule for the year end financials, because that is the document a surety and a general contractor's prequalification packet will read for the next twelve months.
The Obligations That Ignore Your Tax Year
These run on their own cadence, set by contracts and jurisdictions rather than by the calendar year, and they are the ones that catch contractors moving into new kinds of work.
- Certified payroll. Begins with the first public job, on whatever cadence that contract specifies, against the wage determination for that trade and locality. Late or incorrect filings can hold payment on completed work.
- Sales and use tax. Registration and returns multiply as work crosses state lines, and the treatment of materials differs by state in ways that are easy to get wrong.
- Payroll tax registration in new states, which follows the crew rather than the contract.
- Insurance certificate renewals, which lapse mid-job and stall payments regardless of what month it is.
- Workers compensation premium audits, on the carrier's schedule. See how to win a workers comp audit.
Treat a first job in a new state as a planning event. Payroll registration, nexus, use tax, prevailing wage and licensing do not all trigger at the same threshold, and several are difficult to fix retroactively. The time to work it out is before mobilisation.
Specific dates, thresholds and filing cadences change and vary by jurisdiction. This is a shape for the year rather than a list of dates to rely on, and the current figures should be confirmed for your states and contracts. How this runs alongside the rest of the engagement is described on the construction tax page and under subcontractor compliance.
Frequently Asked Questions
What tax deadlines does a construction company have that other businesses do not?
The filing calendar is broadly the same, but contractors carry additional recurring obligations that most businesses never see. Certified payroll reporting on public and federally funded work runs on a cadence set by each contract rather than by the tax year. Sales and use tax registration and returns multiply as work crosses state lines. Payroll tax registration follows crews into new states. And where a long-term contract closes, look-back interest may be computed on Form 8697. None of these appear on a standard small business tax calendar.
When should a contractor review their accounting method?
Early in the year, and every year, rather than at filing. Method eligibility on long-term contracts turns partly on averaged gross receipts, and a contractor can grow past the small contractor exception without anything announcing it. A change of method is made formally on Form 3115 with a section 481(a) adjustment, and it applies to a tax year. Discovering in March that the wrong method applied to the year just ended means the opportunity to plan around it has already passed.
Does equipment timing really matter for taxes?
It can matter a great deal, because the deduction generally depends on when the asset is placed in service rather than when it was ordered or paid for. A purchase that slips across a year end lands in a different tax year, and on a large piece of equipment that shifts a significant deduction. This makes the useful conversation a mid-year one, when you still have time to accelerate or defer deliberately, rather than a December scramble.
What is certified payroll and when does it start?
On public and federally funded projects, contractors must report wages paid to each worker against a wage determination that specifies minimum rates by trade and locality. The federal form is WH-347 and states maintain their own equivalents. The obligation begins with the first public job, on the cadence that contract specifies, and it is enforced. Late or incorrect filings can hold up payment on completed work, which is why it is worth setting up before the first pay application rather than after.
How do multi-state jobs change the compliance calendar?
Crossing a state line can create payroll tax registration, income tax nexus, sales and use tax obligations, prevailing wage determinations specific to that locality, and licensing requirements, and they do not all trigger at the same threshold. The practical rule is to treat a first job in a new state as a compliance event to plan before mobilisation rather than a paperwork consequence to sort out afterwards, because several of these are difficult to fix retroactively.
Deadlines Are Published. Decisions Are Not
Every contractor knows when the return is due. What costs money is the decision with no date on it: the method election reviewed too late to change, the equipment bought in the wrong quarter, the certified payroll cadence discovered after the first public job started. Put the decisions on the calendar alongside the filings and most of the surprises stop.
About the Author
Tom Woolley, MBA
Tom Woolley is a fractional CFO who spent six years running job costing and logistics in construction before founding Today CFO. He works with commercial subcontractors and small general contractors on the reporting a GC and a surety actually read.
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