Tax Calendar for Self-Employed Workers

Quick answer

Monthly: bookkeeping reconciliation. Quarterly: Q1 April 15, Q2 June 15, Q3 September 15, Q4 January 15. Annual: January 31 issue 1099s; March 15 S-corp/partnership returns; April 15 personal return + IRA/HSA contributions; October 15 extended return. State LLC annual report is on a state-specific cycle.

January

Jan 15: Q4 prior-year estimated tax due. Jan 31: issue 1099-NEC and 1099-MISC to contractors paid $600+; file W-2s for any employees. Pull all 1099s received from clients and platforms — start tax-prep folder.

February

Compile expense records, mileage logs, home office documentation. If using TurboTax or similar, software pricing rises in late February — early filers get lower rates. EITC and Additional Child Tax Credit refunds released starting late February (PATH Act delay).

March

Mar 15: Form 1120-S (S-corp) and Form 1065 (partnership) due, or extension via Form 7004 to September 15. Sole props and SMLLCs skip this date — your return is April 15.

April

April 15: Form 1040 due (or extension via Form 4868); Q1 current-year estimated tax; 2025 IRA and HSA contribution deadline; SEP-IRA contribution deadline (extendable to October with Form 4868 extension). Make sure prior-year balance and Q1 are paid even if you file an extension.

May

Quiet month for federal. Some states have LLC annual report deadlines in spring — check your Secretary of State. Set up Q2 estimated tax payment for June 15.

June

June 15: Q2 estimated tax due. Covers only April and May income — the uneven quarter.

July - August

Mid-year tax review: compare YTD income to last year. Adjust Q3-Q4 estimates if income is materially different. Make any tax planning moves while still time to implement (S-corp election consideration, retirement plan setup, equipment Section 179 purchases).

September

September 15: Q3 estimated tax; extended 1120-S and 1065 due. Halfway through the tax calendar.

October

October 15: extended Form 1040 due. Last chance to file the personal return for those who extended. Last chance for SEP-IRA contribution if extended.

November - December

Year-end tax planning: Section 179 equipment purchases, retirement contributions, defer income or accelerate deductions, charitable contributions. Solo 401(k) employee deferral election must be made by December 31. Open Solo 401(k) account by year-end if planning to contribute.

Use the self-employment tax calculator and the quarterly tax calculator for freelancers to size each payment. Bigger picture at how much tax do I owe self-employed.

State-specific dates

LLC annual reports vary widely by state — California, Texas, and Delaware have specific dates. Sales tax filings can be monthly, quarterly, or annually. State income tax deadlines generally match federal April 15. Check your Secretary of State and Department of Revenue.

Recordkeeping cadence

Weekly: bookkeeping session. Monthly: bank reconciliation, credit card reconciliation. Quarterly: review before each estimated payment, adjust if needed. Annually: file return, contribute to retirement, plan for next year.

Common mistakes

Missing January 31 1099 issuance. Missing March 15 for S-corp/partnership. Treating extension as payment extension. Missing state LLC annual report and getting dissolved. Skipping retirement contribution deadline. Forgetting quarterly state payments.

How this fits into the full tax picture

Federal income tax and the 15.3% self-employment tax are the two halves of the federal freelancer tax bill. Both apply to net Schedule C profit; both can be reduced by legitimate business deductions. State income tax adds on top in 41 states. Quarterly estimated payments cover both federal taxes throughout the year so the April reconciliation is small. The whole system rewards consistent recordkeeping more than any single clever tax strategy — track every legitimate deduction, set aside the right percentage, and pay quarterly through EFTPS automatically. The ranked overview at best tax deductions for 1099 workers shows where the biggest dollars sit; the freelancer tax deductions checklist is the tickable run-through, and what expenses can freelancers write off covers edge cases.

What tax software handles automatically

Most modern tax software — TurboTax Self-Employed, FreeTaxUSA, H&R Block Self-Employed, TaxAct Self-Employed — handles the underlying form mechanics automatically once you indicate self-employment income. You enter income amounts and categorized expenses; the software fills out Schedule C, Schedule SE, Schedule 1, Form 8995 for QBI, and any other forms required. The half-SE deduction flows automatically. Quarterly estimated payment calculations are also automatic once prior-year tax is in. DIY paper filers need to handle each form manually, which is where small errors most often creep in. For the filing walkthrough see how to file taxes as a freelancer and the form reference at what tax forms do freelancers need. The mechanics of self-employment tax itself are at self-employment tax rate 2026 and self-employment tax vs income tax.

Building a year-round tax workflow

The freelancers who feel calm at tax time are the ones who built a simple year-round workflow. The pattern that works for almost everyone: separate business bank account that all client payments hit; weekly 20-minute bookkeeping session that categorizes every expense and reconciles to bank; mileage app running automatically on the phone; folder system for receipts (digital photos count); quarterly review the week before each estimated payment deadline that totals income to-date, recalculates the target safe harbor amount, and submits through EFTPS. None of those steps is hard in isolation; what makes them powerful is that they happen consistently. By the time April rolls around, every number that goes onto Schedule C already exists in your records and the filing session is mostly clicking through screens rather than reconstructing a year. To avoid the predictable pitfalls, see common freelancer tax mistakes and how to avoid freelancer tax penalties.

When professional help is worth it

For straightforward freelance returns — one Schedule C, standard deductions, no entity changes — most freelancers DIY successfully with tax software. Professional help tends to earn its fee in specific situations: S-corp election, multi-state work, large or unusual deductions, an IRS notice you do not understand, or an entity decision you are weighing. The typical fee for a freelance Schedule C return is $300-$800 a year, much of which becomes a Schedule C deduction itself, making the net cost meaningfully lower. Above $100,000 of net SE income, the conversation with a CPA usually pays for itself many times over through better entity structuring and retirement-plan choice. The tactical guidance for reducing SE tax legally is at how to lower self-employment tax legally and the underlying Schedule C math is at Schedule C for freelancers explained and Schedule SE explained for freelancers.

What changes as your income grows

At low income (under about $25K of net SE profit), federal income tax is often zero after the standard deduction and QBI, and SE tax is the only federal bill. At mid income ($50K-$100K), federal income tax kicks in meaningfully on top of SE tax, the half-SE deduction starts to matter, and the QBI deduction becomes a real number. Retirement contributions become powerful levers. At higher income ($100K-$200K+), the conversation widens to S-corp election, defined benefit plans, accountable plans for reimbursements, and larger home office deductions — all worth considering with a CPA. The mechanics of the SE deduction at the heart of this are explained at self-employment tax deduction explained. Above $200K of net profit, professional tax planning usually beats the fee many times over.

The audit-readiness habit

Audit rates for Schedule C filers are low but not zero, and the freelancers who weather an audit calmly are the ones who built audit-readiness into their normal workflow. The principle is simple: assume an auditor will look at every number on your return and ask "how do you know?" Keep contemporaneous records — receipts, bank statements, mileage logs, calendar entries, contracts — so the answer is always documented. Save records for at least three years after filing (six for omitted income over 25%, indefinitely if you never filed). Photograph paper receipts the day you get them; the ink fades, the auditor will not. Use a separate business bank account so the year-end Schedule C is a clean reconciliation. Most audits are mail correspondence audits about one or two specific line items, not full field audits — having a folder labeled with the year that contains the relevant records turns a six-month back-and-forth into a one-week resolution.

Why the math compounds across the year

The biggest tax-savings unlock for most freelancers is not finding the one perfect deduction — it is consistency across many small categories. A $200 phone deduction, a $40 cloud storage subscription, a $90 mileage log entry, a $300 home office allocation, a $1,200 SEP-IRA contribution: individually each looks unremarkable, but together across a year they shift the bottom line by several thousand dollars. The freelancers who pay the most tax are usually not the ones who missed one giant deduction; they are the ones who never tracked the dozens of small ones because each looked too small to bother with. The flip side is also true — a freelancer who runs a weekly bookkeeping session, mileage app, and categorized expense ledger gathers all those small wins without thinking about them. The tax savings are then locked in by the time April arrives, no scrambling required. This consistency point matters more than any single tactic.

Frequently asked questions

The bottom line

The self-employed tax calendar has six core federal dates plus state-specific ones. Set calendar reminders for each. Run a monthly bookkeeping reconciliation, quarterly estimated-payment review, and an annual return-filing pass. State LLC annual reports are the most-missed item — check your state's cycle.

Related guides & calculators

Last updated: May 27, 2026. Disclaimer: Educational guide only. Not tax or legal advice. Confirm specifics with a licensed CPA or Enrolled Agent before filing.