Tax season doesn’t have to throw off your entire schedule. Whether it’s your first year filing or you’ve done this before, getting ahead of the paperwork now can save you major time—and stress—later. That’s why a small business tax preparation checklist can be especially helpful.
| “The rules can get complicated. Different business structures have different filing requirements. You might owe income taxes, estimated taxes, self-employment taxes—even payroll, sales, or excise taxes, depending on how you operate. Missing a step could mean delays, penalties, or lost deductions,” said Credibly Founder Ryan Rosett. |
In this blog post, you’ll find a step-by-step checklist that breaks down what to file, what to gather, and what to watch for.
The top 3 things to watch for as you start thinking about tax preparation for your small business
Before you file, it helps to know exactly what you’re being taxed on. The kind of taxes you owe depends on how your business is structured and how you operate day to day. Some are tied to your income, others to your team, assets, or even the products you sell.
Let’s take a look at what tax preparation for small businesses should cover.
1. What are the different types of small business taxes?
As a small business owner, you’re on the hook for multiple types of taxes—some tied to how your business is set up, others based on how you operate day to day.
Income taxes
All businesses file some form of federal tax return, but how you file depends on your structure.
- Sole proprietors file with a personal 1040 and attach a Schedule C
- Partnerships submit a Form 1065 and give partners a Schedule K-1
- S corporations file Form 1120-S, with shareholders reporting income on their personal returns
- C corporations file Form 1120 and pay corporate income tax, then shareholders pay again on dividends
For most pass-through entities (sole prop, partnership, S corp), your business doesn’t pay federal income tax—the business owners do, in most cases.
Estimated taxes
Quarterly tax payments might be on your to-do list, depending on your business structure (C corp, S corp, partnership, or sole proprietorship) and income level.
Here’s the rule:
- C corporations are required to make estimated tax payments if they expect to owe $500 or more when filing their return
- Sole proprietors, partners, and S corporation shareholders must make estimated payments if they expect to owe $1,000 or more in taxes when filing their personal return after subtracting withholding and refundable credits.
You’ll need to set aside what you owe and pay four times a year if you meet these requirements. Miss a deadline, and you could face penalties—even if you pay your full tax bill later.
Plan for next year with these tips:
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Self-employment taxes
Sole proprietors and individual partners in a partnership are also subject to self-employment tax for Social Security and Medicare and must attach Schedule SE to their 1040 or 1040-SR form.
Employment taxes
Got a team? Then you’re responsible for payroll taxes:
- Withholding income tax from paychecks
- Matching Social Security and Medicare contributions
- Paying unemployment tax (FUTA)
Forms like 941, 944, and 940 help report and remit these taxes properly.
Excise tax
Not all taxes are tied to income or payroll. If your business sells or uses certain goods or services, excise taxes might be part of the picture, whether you’re a sole prop, partnership, or corporation, depending on your industry or product.
These taxes apply to specific categories like:
- Fuel and transportation
- Indoor tanning services
- Sport fishing equipment
- Vaccines
- Tobacco and other products considered high-risk or high-impact
Sales tax
If you sell taxable products or services, you may need to collect and remit sales tax based on your state’s rules. That includes registering for a sales tax permit, tracking collections, and filing returns on time.
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2. Documentation you will need
Tax season gets easier when you’ve got your documents ready. Whether you’re working solo or with an accountant, here’s what to pull together so you can file fast and avoid delays.
Start with your core business information
Have these basics on hand:
- Your EIN (or SSN if you’re a sole prop)
- Last year’s tax return—helpful for identifying deductions and speeding up prep
- Any state or local tax IDs tied to your business
Employment records (if you have a team)
If you’ve got employees or contractors, collect the right forms now:
- W-2s for employees (due by Jan 31)
- 1099-NEC forms for independent contractors
- W-9s and I-9s to verify work eligibility and tax IDs
If part of your home doubles as your workspace, make sure to gather:
- Square footage of your home and your office
- Rent or mortgage payment breakdowns
- Utility bills and insurance costs
You’ll need these numbers to claim the right percentage as a deduction.
Know what you can write off
Every deduction counts—and some are easier to miss than others. Common write-offs include:
- Rent, insurance, and utilities
- Advertising and marketing spend
- Legal or consulting fees
- Employee wages and benefits
- Business travel and meals
- Mileage and internet/phone service
- Software, licenses, and training
- Depreciation on equipment and assets
Make sure to keep track of your expenses and deductions throughout the year. Bring all your records with you and save them for future reference. Your accountant can help you spot more opportunities to reduce what you owe.
Bring income and funding docs
The IRS wants to know what you made—and where your capital came from.
- Sales reports and invoices
- Bank statements and deposit slips
- Proof of outside funding (including grants and PPP loans)
- Interest statements or remittance summaries tied to your financing
Match your income to your expenses
To balance things out, you’ll also need to show how your business spent money:
- Receipts for business purchases
- Bills paid throughout the year
- Credit card statements
- Transaction exports from accounting tools or expense tracking apps
Inventory and cost of goods sold (COGS)
If you manage inventory, your accountant needs two things:
- Your latest inventory report
- A breakdown of how much it costs to make or buy what you sell
Not sure your numbers are up to date? Run a fresh count before filing to avoid reporting issues.
Investment income and asset details
Even if you didn’t cash out, investment activity still needs to be reported. Bring records for:
- Stocks and bonds your business holds
- Real estate used for income or investment
- Any cryptocurrency in your business wallet
This helps your accountant track unrealized gains and stay ahead of future reporting needs.
3. Make sure you fill out this small business tax deductions checklist
Save yourself time from digging through your bank statements later—fill out this checklist. Remember: You can only use deductions for business purposes. If these deductions are only used a percentage of the time for your business, that percentage needs to be what you write off.
Bank fees & interest
✅ Business account and credit card fees
✅ Interest on business financing
Bad debts
✅Unpaid invoices or loans
Advertising & marketing
✅Website, branding, and logo design
✅Business cards, promos, and digital ads
✅Marketing services, materials, and subscriptions
Contract labor
✅Freelancers and independent contractors
Depreciation
✅Equipment, vehicles, and office furniture
Meals
✅Client meetings, staff meals, and business travel dining
Taxes
✅Federal, state, local, payroll, and sales taxes paid by the business
Energy efficiency upgrades
✅Solar, HVAC, and lighting improvements
Wages & benefits
✅Salaries, bonuses, time off, and insurance
Office or coworking space
✅Rent, deposits, and cancellation fees
Office supplies & furniture
✅Desks, chairs, and stationery
Phone & internet
✅Monthly business phone and internet charges
Professional services
✅Accounting, legal, and tax prep
Property taxes
✅On business-use property
Retirement contributions
✅IRA or 401(k) for owners and employees
Software subscriptions
✅CRM, scheduling, accounting tools, and marketing tools
Business Travel
✅Flights, car rentals, hotels, and parking
Utilities
✅Business-use electricity, water, and gas
Vehicle Use
✅Fuel, maintenance, and insurance
Stay ahead with this small business tax preparation checklist
The more buttoned-up your records, the smoother your small business tax prep. Stay organized and check with a tax pro to make sure nothing slips through the cracks.
Know which taxes you owe
| Income tax | |
| ✅ | Sole prop: 1040 + Schedule C |
| ✅ | Partnership: Form 1065 + Schedule K-1 |
| ✅ | S corp: Form 1120-S + shareholder K-1 |
| ✅ | C corp: Form 1120 |
| Estimated taxes | |
| ✅ | For C corporations: Make estimated tax payments if you expect to owe $500 on your return |
| ✅ | For sole proprietors, partners, and S corporation shareholders: Make estimated payments if you expect to owe $1,000 more in taxes when filing your personal return |
| ✅ | Quarterly tax payment records: Proof of any estimated taxes you’ve already paid, dates and amounts of each quarterly payment, and IRS confirmation numbers or bank receipts |
| Employment taxes (if you have a team) | |
| ✅ | Withhold income tax |
| ✅ | Send W-2s |
| ✅ | Match Social Security & Medicare |
| ✅ | Pay FUTA (federal unemployment tax) |
| Excise tax | |
| ✅ | If you sell certain goods (fuel, tobacco, etc.) |
| Sales tax | |
| ✅ | If you sell taxable goods/services |
| ✅ | Register, track, and file based on state rules |
| Charitable contributions | |
| ✅ | Proof of business-related donations (cash or in-kind) |
| ✅ | Receipts or written acknowledgment from recipient organization |
| Year-end reconciliation reports | |
| ✅ | Year-end balance sheet |
| ✅ | Profit & loss statement |
| ✅ | General ledger summary |
| Deductions | |
| ✅ | Track business vs. personal use percentages |
| ✅ | Collect supporting bills and mileage logs |
| ✅ | Advertising |
| ✅ | Business meals |
| ✅ | Business insurance |
| ✅ | Mileage on your car for business use |
| ✅ | Contractors |
| ✅ | Depreciation |
| ✅ | Home office |
| ✅ | Legal and professional fees |
| ✅ | Rent expenses |
| ✅ | Salary expenses |
| ✅ | Benefits expenses |
| ✅ | Phone and internet expenses |
| ✅ | Business travel |
| ✅ | Tax preparation fees |
| Audit-ready backup | |
| ✅ | Keep digital or paper copies of everything |
| ✅ | Organize files by category (income, expenses, payroll, etc.) |
