7 Days to April 15: The Contractor Tax Checklist That Saves You From a 47.5% Penalty

TL;DR

Tax day is April 15, one week from today. If you are a self-employed contractor, here is the short version. Total every dollar of 2025 income (cash, card, app, all of it). Gather any 1099-NECs you should have received. Document deductible expenses, including the 70 cents per mile vehicle deduction. Calculate your 15.3% self-employment tax on net profit. Issue 1099-NECs to any subcontractor you paid $600 or more last year (the new $2,000 threshold does not apply yet). If you cannot file by April 15, request an extension with Form 4868, but pay what you owe by April 15 anyway. An extension does not extend your payment deadline.

You Have One Week. Here Is What April 15 Costs If You Skip It.

It is April 8. Your phone is ringing with spring jobs, your crew is booked, and somewhere between your truck cab, your office desk, and three email accounts is the paperwork for your 2025 taxes.

The IRS does not care that this is your busiest week of the year. April 15 is a hard deadline, and the penalties stack fast. The failure-to-file penalty alone is 5% of unpaid taxes per month, capped at 25%. Add the failure-to-pay penalty on top and you can lose up to 47.5% of what you owe before interest even starts. Here is the seven-day checklist that gets you across the line, plus a 1099 rule change from 2025 that almost nobody is talking about.

1. Total Every Dollar You Earned in 2025

You cannot estimate this. You need an exact number, because the IRS already has theirs.

Pull together every income source: job invoices, customer payments, card deposits, cash, and anything that came through Square, Stripe, PayPal, or Venmo. Self-employed contractors report this on Schedule C as part of Form 1040. Deposits and down payments count as income in the year you received them, not when the job finished. Cash counts too. Track it.

Even if a customer or platform never sends you a 1099, the income is still taxable. The 1099 just gives the IRS something to match against your return. If you are still piecing 2025 income together from a pile of spreadsheets, you are in the exact spot most contractors swear they will never be in again.

2. Gather W-2s and 1099-NECs You Should Have Received

Anyone who paid you $600 or more for work in 2025 was required to send you a 1099-NEC by early February. If you have not received one, email them today and ask. The IRS gets a copy too, and any mismatch between what they report and what you file will flag your return. Also collect W-2s for any employees on your crew.

3. The 1099 Rule Change Almost Nobody Caught

Two separate 1099 thresholds got rewritten by the One Big Beautiful Bill Act in July 2025. Most contractors mix them up, so here is the clean version.

Form 1099-K (payment apps and cards): The threshold reverted to the old $20,000 and 200 transactions rule, retroactively. If you took fewer than 200 card or app payments in 2025, or processed under $20,000, you may not get a 1099-K at all. The income is still taxable. You still report it.

Form 1099-NEC (paying subcontractors): The $600 threshold stays in effect for 2025 payments. It rises to $2,000 starting with payments made in 2026. For the return you are filing right now, the old $600 rule applies. You must still issue a 1099-NEC to any subcontractor you paid $600 or more last year. The new $2,000 threshold does not help you until you file your 2026 return next April.

This matters because contractors who heard "the threshold is now $2,000" and skipped issuing 1099-NECs for 2025 work are walking into IRS penalty letters this summer.

4. Document Every Deductible Expense

Every dollar you spent running the business reduces your taxable income, but only if you can prove it. A credit card line item with no description is not proof. A shoebox of fuel receipts is barely proof. Pull together documentation for:

1. Tools, equipment, and replacement parts under $2,500
2. Materials and supplies (refrigerant, fittings, lumber, drywall, PPE)
3. Crew wages and any subcontractor payments
4. Insurance (general liability, workers' comp, vehicle, self-employed health)
5. Business phone and internet (the business portion only)
6. Home office (utilities, pro-rated rent or mortgage, supplies)
7. Licenses, permits, bonds, and EPA or trade certifications
8. Software, CRM, and field service subscriptions

Vehicle expenses deserve their own paragraph, because for most contractors this is the single biggest deduction they get wrong. You have two methods: the standard mileage rate or actual expenses. The 2025 standard mileage rate is 70 cents per business mile. Multiply your business miles by 0.70 and that's your deduction. The actual expense method lets you deduct gas, maintenance, insurance, depreciation, and lease payments, scaled to your business-use percentage. You pick whichever method gives you the bigger number, but if you want to use standard mileage at all, you must use it in the first year you put the vehicle in service. Heads up for next year's planning: the 2026 rate increases to 72.5 cents per mile.

5. Calculate Your Self-Employment Tax

This is where most contractors get blindsided. As a self-employed business owner, you owe both halves of Social Security and Medicare, which the IRS calls self-employment tax. The rate is 15.3% (12.4% for Social Security and 2.9% for Medicare).

The math: take your net profit (gross income minus deductible expenses), multiply by 92.35% to get your taxable SE earnings, then multiply by 15.3%. The 92.35% step exists because the IRS lets you exclude the employer-equivalent share before applying the rate.

If your net profit was $50,000, your SE tax is roughly $7,065. Federal income tax stacks on top. You also get to deduct half the SE tax above-the-line, which softens the income tax bill but does not reduce the SE tax itself.

6. Issue 1099-NECs to Your Subcontractors

If you paid any single subcontractor $600 or more in 2025, you were required to issue them a Form 1099-NEC and file a copy with the IRS by early February. If you missed that deadline, file as soon as possible. Late filing penalties are smaller than what you get for not filing at all. Pull your payment records, sort by payee, and check totals. If you used payroll or accounting software, this is automated. If you tracked it manually, double-check today.

7. Pay Your Q1 2026 Estimated Taxes (Same Day)

April 15 is not just your filing deadline. It is also the first quarterly payment for 2026 estimated taxes. The 2026 schedule:

1. April 15, 2026 (Q1)
2. June 15, 2026 (Q2)
3. September 15, 2026 (Q3)
4. January 15, 2027 (Q4)

Paying quarterly is how you avoid a brutal lump sum next April, and it avoids the underpayment penalty, which the IRS charges even if you end up owed a refund.

5 Mistakes That Cost Contractors Real Money

Beyond the deadline itself, here are the mistakes the IRS sees most often from self-employed trades.

Mixing personal and business accounts. If your business income and personal spending run through the same checking account, you will miss deductions and your bank statements become useless as proof during an audit. Open a dedicated business account and run everything through it.

Skipping the home office deduction out of audit fear. This deduction is not the audit magnet contractors think it is. If you have a space in your home used regularly and exclusively for business (an office, a dedicated truck bay, a parts storage area), it counts. Skipping it costs you real money.

Forgetting to set aside taxes from every payment. A safe rule of thumb for self-employed contractors is to set aside 25 to 30% of every customer payment in a separate account, untouched until quarterly tax day. Contractors who do not do this are the ones panicking in April.

Ignoring state taxes. The federal numbers in this post are only half your liability. Most states impose their own income tax, and some require their own quarterly estimated payments. Multi-state work (a job across the state line) can trigger filing requirements in both states.

Filing late even when you cannot pay. This is the most expensive mistake by a wide margin. The failure-to-file penalty is ten times the failure-to-pay penalty (5% per month vs 0.5% per month). Always file on time, even if you cannot pay a dollar of what you owe.

What to Do If You Cannot File by April 15

You have one option: request an extension by filing Form 4868. That gives you until October 15, 2026 to submit your paperwork.

Read this carefully. An extension extends your filing deadline, not your payment deadline. The IRS still expects your estimated tax bill paid in full by April 15. If you do not pay, the failure-to-pay penalty starts accruing the next day at 0.5% per month, on top of interest, until you settle up.

If you cannot pay in full, the IRS offers two payment plan options you can apply for online. A short-term payment plan gives you up to 180 days to pay in full, has no setup fee, and is available for balances under $100,000. A long-term installment agreement lets you pay monthly over a longer period, has a setup fee, and is available for balances under $50,000. Either way, file your return on time first. Filing on time and getting on an approved plan drops your failure-to-pay rate from 0.5% to 0.25% per month. Half the bleed.

FAQ

Q: I missed the February deadline to issue 1099-NECs to my subcontractors. What do I do?

File them anyway. The IRS charges late filing penalties on a sliding scale based on how late you are, but those penalties are far smaller than the ones for never filing at all. Get them in and move on.

Q: I cannot pay what I owe by April 15. What is the best move?

File your return on time, pay as much as you can, and apply for a payment plan on irs.gov. Filing on time avoids the 5% per month failure-to-file penalty entirely, and an approved plan cuts your failure-to-pay rate in half. Doing nothing is the most expensive option.

Q: How long do I need to keep my tax records after filing?

The IRS generally recommends three years, which is the standard audit window. Keep employment tax records for at least four years. Hold property and asset records for as long as you own the asset, plus three years. If you under-reported income by more than 25%, the IRS can look back six years, so seven years is the conservative play.

Q: I take cash on a lot of jobs. Do I really have to report it?

Yes. The IRS treats cash income exactly like any other income, and the absence of a 1099 does not make it invisible. If you get audited and your bank deposits or lifestyle do not match your reported income, the IRS will reconstruct what you should have reported, and you will pay tax plus penalties on the gap. Track it.

Stop Reinventing April

If you are reading this in panic mode, this April is about damage control. Get your number as accurate as you can, file on time (or extend), and pay what you owe.

Then commit to one thing for 2026: stop running your books out of a shoebox. The contractors who sail through tax season are the ones whose income, expenses, and payments are logged the moment a job happens. Consolidating to one platform is what separates contractors who panic in April from contractors who export a clean report and get back to work.

FieldServ AI logs every job, payment, and expense as you go, so your tax records build themselves throughout the year instead of getting reassembled the week of April 15. If tax season feels like chaos, it does not have to next year. Start your free 21-day trial and see what running an organized contracting business actually looks like.