Business Tax Compliance Checklist and Forms Guide (2025-2026)

Step 1: Set Up Your Business for Tax Compliance

The decisions you make when starting out set your tax rules for the year. The IRS Checklist for Starting a Business and Publication 334 (2025) outline the foundational setup steps every owner must complete.

First, select a business structure: sole proprietorship, partnership, corporation, S corporation, or Limited Liability Company (LLC). A single-member LLC is generally disregarded as a separate entity for income tax purposes and reports income and deductions on the owner's federal return using Schedule C (Form 1040), unless it elects corporate treatment.

A business jointly owned and operated by a married couple is generally treated as a partnership and must file Form 1065, U.S. Return of Partnership Income. However, spouses who file a joint return and each materially participate as the only members of an unincorporated business (not held in the name of a state law entity like an LLC or LLP) can elect qualified joint venture (QJV) status, where each spouse files a separate Schedule C and Schedule SE on their joint return. If spouses wholly own an unincorporated business as community property in Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, or Wisconsin, they can treat it either as a sole proprietorship or a partnership.

Second, get the right Taxpayer Identification Numbers (TINs), collect payee forms, and establish your accounting rules:

• SSN or ITIN: Sole proprietors without employees generally use their Social Security Number (or an Individual Taxpayer Identification Number issued via Form W-7 for aliens ineligible for an SSN). An ITIN expires if you do not file a federal income tax return for 3 consecutive years.
• Employer Identification Number (EIN): You must have an EIN if you pay wages to one or more employees or file pension or excise tax returns. You may also need a new EIN if your business form or ownership changes. Businesses located in the US or US territories can apply online at IRS.gov/EIN for immediate issuance upon validation, or mail or fax Form SS-4.
• Employee and contractor onboarding forms: Have each new employee complete Form I-9 and Form W-4 (Employee's Withholding Certificate), and record their name and SSN exactly as shown on their Social Security card. Before paying a nonemployee or organization for reportable payments, collect Form W-9 to get their SSN or EIN, or backup withholding rules may apply.
• Tax year selection: You adopt a calendar tax year (January 1 through December 31) or a fiscal tax year (12 consecutive months ending on the last day of any month except December, or a 52-53-week year) on your first return. You must use a calendar year if you do not keep books, have no annual accounting period, or your present year does not qualify as a fiscal year. Changing your tax year later generally requires Form 1128.
• Accounting method selection: Choose the cash method (reporting income when actually or constructively received and deducting expenses when paid), an accrual method (reporting income when earned under the all-events test and deducting expenses when liability is fixed and economic performance occurs), or a combination method on your first return. Businesses that produce, purchase, or sell merchandise must generally keep an inventory and use an accrual method unless they qualify as a small business taxpayer (average annual gross receipts of $31 million or less for the 3 prior tax years and not a tax shelter). Changing your accounting method later requires IRS approval via Form 3115.

• IRS: Publication 334 (2025), Tax Guide for Small Business
• IRS: Small business, self-employed, other business

Step 2: Checklist of the 5 Federal Business Tax Types

According to the IRS Business Taxes guide, federal compliance falls into five general categories.

• 1. Income Tax: All businesses except partnerships must file an annual income tax return. Partnerships file an information return on Form 1065. Sole proprietors and single-member LLCs report business profit or loss on Schedule C, filing a separate Schedule C for each business operated. Ordinary business income from partnerships, multi-member LLCs, and S corporations passes through to the owners' personal returns (using Schedule E where applicable). Corporations file Form 1120.
• 2. Estimated Taxes: Federal income tax is a pay-as-you-go system. Individuals (including sole proprietors, partners, and S corporation shareholders) generally must make estimated tax payments using Form 1040-ES if they expect to owe $1,000 or more in tax (including self-employment tax) when filing their return. Corporations generally must make installment payments if they expect estimated tax for the year to be $500 or more.
• 3. Self-Employment (SE) Tax: You must pay SE tax and file Schedule SE if your net earnings from self-employment were $400 or more (or if you had church employee income of $108.28 or more from an exempt church organization). The SE tax rate is 15.3%, consisting of 12.4% for Social Security and 2.9% for Medicare. The 12.4% Social Security part applies only to the first $176,100 of combined wages, tips, and net earnings in 2025, rising to $184,500 in 2026. All net earnings are subject to the 2.9% Medicare part. A 0.9% Additional Medicare Tax (Form 8959) applies when net earnings exceed $250,000 (married filing jointly), $125,000 (married filing separately), or $200,000 (single, head of household, or qualifying surviving spouse).
• 4. Employment Taxes: Employers must handle Social Security and Medicare taxes, federal income tax withholding, and Federal Unemployment (FUTA) tax. Report Social Security, Medicare, and withheld income taxes quarterly on Form 941, or annually on Form 944 if your annual liability for those taxes is $1,000 or less. Report FUTA tax annually on Form 940. Employers must deposit all employment taxes electronically by electronic funds transfer (EFT).
• 5. Excise Taxes: Form 720 (Quarterly Federal Excise Tax Return) covers environmental taxes, communications and air transportation taxes, fuel taxes, first retail sales of heavy trucks/trailers/tractors, manufacturer's taxes, and indoor tanning services. Form 2290 reports the tax on heavy highway vehicles (trucks, truck tractors, and buses) with a taxable gross weight of 55,000 pounds or more. Businesses accepting wagers or conducting a wagering pool or lottery use Form 730 to figure wagering tax and Form 11-C to register and pay the occupational wagering tax.

• IRS: Publication 334 (2025), Tax Guide for Small Business
• IRS: Business taxes

Step 3: Information Returns, Worker Classification, and Cash Reporting

The IRS compares the information returns you file against your payees' tax returns to verify reported income. Failing to file correct information returns or furnish payee statements on time triggers separate penalties, though errors on a de minimis number of returns (the greater of 10 or 0.5% of total required returns) are not penalized if corrected by August 1 of the year due.

Under P.L. 119-21 (commonly known as the One Big Beautiful Bill Act), the information reporting and backup withholding threshold for certain payments made after December 31, 2025 increases from $600 to $2,000.

• Form W-2 and Form W-3: File Form W-2 along with transmittal Form W-3 annually with the Social Security Administration (SSA), and furnish a copy of Form W-2 to each employee by January 31.
• Form 1099-NEC (Nonemployee Compensation): File for each nonemployee paid at least $600 during the calendar year ($2,000 for payments made after December 31, 2025) in the course of your business for services performed (including parts and materials), cash payments for fish purchased for resale, or payments to an attorney for services. Also file for anyone from whom you withheld federal income tax under backup withholding rules regardless of the amount.
• Form 1099-MISC (Miscellaneous Information): File for royalty payments (or broker payments in lieu of dividends or tax-exempt interest) of $10 or more, and for payments of $600 or more ($2,000 after December 31, 2025) for rents (other than to real estate agents), prizes and awards not for services, payments to fishing boat crew members, or gross proceeds paid to an attorney. Either Form 1099-NEC or Form 1099-MISC can report direct sales of $5,000 or more of consumer products for resale anywhere other than a permanent retail establishment.
• Form 8300 (Cash Payments Over $10,000): File Form 8300 if your business receives more than $10,000 in cash (including US and foreign coin and currency, plus cashier's checks, traveler's checks, and money orders under certain rules, but excluding personal checks) in one transaction or two or more related transactions. Non-compliance carries civil and criminal penalties, including up to 5 years in prison.

• IRS: Publication 334 (2025), Tax Guide for Small Business
• IRS: Small business, self-employed, other business

Step 4: Master Federal Tax Compliance Calendar and Payment Rules

If any due date falls on a Saturday, Sunday, or legal holiday, the filing or payment is due on the next business day. All US tax payments must be remitted in US dollars (digital assets are not accepted). Employers must deposit all employment taxes via EFT, while income and estimated taxes can be paid through the Electronic Federal Tax Payment System (EFTPS), IRS Direct Pay, IRS Business Tax Account (IRS.gov/BusinessAccount), Electronic Funds Withdrawal during e-filing, debit/credit card, same-day wire, check/money order, or cash at a participating retail store. Taxpayers who cannot pay in full can apply for an online payment agreement (IRS.gov/OPA) or check the Offer in Compromise Pre-Qualifier (IRS.gov/OIC).

• IRS: Small business, self-employed, other business
• IRS: Business taxes

Worked Example: Calculating 2025 vs. 2026 Self-Employment Tax

Here is a step-by-step calculation written by our team using the regular method. Suppose you are a single sole proprietor with no W-2 wages, and your Schedule C shows a net profit of $200,000 in 2025 and $200,000 in 2026.

Step 1 (Figure actual net earnings): Multiply your Schedule C net profit by 92.35% (0.9235). By our calculation from IRS Publication 334, $200,000 multiplied by 0.9235 equals $184,700 in actual net earnings subject to SE tax.

Step 2 (Calculate 2025 SE tax): In 2025, the 12.4% Social Security portion applies only to the first $176,100 of net earnings, which by our calculation is $21,836.40. The 2.9% Medicare portion applies to all $184,700 of net earnings, equaling $5,356.30. Together, your total 2025 SE tax is $27,192.70. Because $184,700 is under the $200,000 single threshold, the 0.9% Additional Medicare Tax does not apply.

Step 3 (Calculate 2026 SE tax): In 2026, the 12.4% Social Security cap rises to $184,500. Applying 12.4% to the first $184,500 of your $184,700 net earnings equals $22,878.00, plus the same $5,356.30 Medicare portion on all $184,700 of net earnings, for a total 2026 SE tax of $28,234.30.

• IRS: Publication 334 (2025), Tax Guide for Small Business
• IRS: Business taxes

Key 2025 and 2026 Deductions, Limits, and Closing Checklist

Here are the key statutory deduction limits (including updates under P.L. 119-21) as well as the final returns required if you close or sell your business:

• Standard mileage rate: 70 cents per mile for 2025, increasing to 72.5 cents per mile for 2026. For a car you own, you must choose the standard mileage rate in the first year the car is available for business use.
• Section 179 and bonus depreciation (Form 4562): Beginning in 2025, the maximum Section 179 deduction is $2,500,000, reduced dollar-for-dollar once property placed in service exceeds $4,000,000 (with an SUV limit of $31,300, and a first-year passenger automobile depreciation cap of $12,200, or $20,200 with the special depreciation allowance). A 100% additional first-year bonus depreciation deduction is allowed for qualified property acquired after January 19, 2025.
• De minimis safe harbor and home office: Elect to deduct tangible property up to $2,500 per item or invoice ($5,000 with an applicable financial statement).
• Meals, gifts, R&E, QBI, and losses: Business meals are generally 50% deductible. Business gifts are deductible up to $25 per recipient per year (excluding incidental costs and engraved promotional items costing $4 or less). Beginning in 2025, domestic research and experimental (R&E) expenditures can be deducted currently or amortized over 60 months or more. The 20% Qualified Business Income (QBI) deduction (Form 8995 or 8995-A) and the excess business loss limitation (Form 461, carried forward as an NOL) are both permanent. General business credits are claimed via Form 3800.
• Going out of business checklist (Table 1-3): File final Schedule C and Schedule SE with your individual income tax return, attaching Form 4797 if selling/exchanging business property (or if business use of Section 179 or listed property drops to 50% or less) and Form 8594 if selling the business. File final Form 941 or 944 (entering the final wage date on line 17 of Form 941 or line 14 of Form 944), file final Form 940 (checking box d), and issue final Forms W-2 (with Form W-3) and Forms 1099-NEC/1099-MISC (with Form 1096 if filing on paper).

• IRS: Publication 334 (2025), Tax Guide for Small Business
• IRS: Small business, self-employed, other business

Flat-Price Business Tax Filing and Bookkeeping

Aldro is the cheapest way to get your business taxes done: $399 flat, with bookkeeping at $20 a month.

The flat price covers everything tax for the year (every federal and state or provincial business return: Schedule C, 1065, 1120-S, 1120 and state returns. T2 and T1 with T2125 in Canada). We also include multi-state returns at the same price, the owner's personal return when the business income needs it, Quebec returns included, and each unfiled prior year billed at the same flat price. Extensions and quarterly estimate reminders are included, along with 1099-NEC, T4/T4A and T5018 slips, city and local business returns, and state franchise tax reports, and we work out quarterly estimates and CRA installments. Our bookkeeping covers unlimited bank and card accounts, monthly reconciliation and statements, but not payroll processing or sales-tax filing. If you are switching from Bench or another service, we start within a week of getting the documents.

• IRS: Small business, self-employed, other business
• IRS: Publication 334 (2025), Tax Guide for Small Business