How to fill out Schedule C for 2026: line-by-line instructions for sole proprietors
Schedule C is where sole proprietors and single-member LLC owners report business income and expenses on their personal tax return. You file it with Form 1040 by April 15, 2027, and the net profit on line 31 sets both your income tax and your self-employment tax.
What's new for 2026:
The standard mileage rate is 72.5 cents per mile for January to June 2026 and 76 cents per mile from July 1, 2026.
The Social Security wage base for self-employment tax rose to $184,500.
If you pay contractors, the 1099-NEC threshold rose to $2,000, which affects your answers to header items I and J.
100% bonus depreciation and the qualified business income deduction are both now permanent.
For most service businesses, one number matters more than any other. Line 1, gross receipts, has to reconcile to every 1099 your clients and payment processors filed.
Schedule C at a glance
Key fact | 2026 tax year |
|---|---|
Who files | Sole proprietors, single-member LLCs (unless taxed as a corporation), and freelancers paid on 1099s |
Due date | April 15, 2027, with Form 1040. An extension to October 15 extends filing, not payment |
Where profit goes | Line 31 flows to Schedule 1 (income tax) and Schedule SE (self-employment tax) |
Self-employment tax | Owed if net earnings are $400 or more. 15.3% up to the Social Security wage base, then 2.9% Medicare |
Standard mileage rate | 72.5 cents per mile for January to June 2026, 76 cents per mile from July 1, 2026 |
Simplified home office | $5 per square foot, up to 300 square feet ($1,500) |
Estimated payments | Quarterly. Next due January 15, 2027 |
Download Schedule C
Do you file Schedule C?
Your situation | File Schedule C? |
|---|---|
Sole proprietor or freelancer with any business income | Yes |
Single-member LLC taxed as a disregarded entity (the default) | Yes |
Single-member LLC that elected S-corp or C-corp status | No. File Form 1120-S or Form 1120 |
Multi-member LLC or partnership | No. File Form 1065 and report your K-1 |
Employee with a side business | Yes, for the side business income |
Line-by-line instructions (key lines)
Line | What to enter | Where the number comes from in your books |
|---|---|---|
A / B: Business and code | What you do, plus the 6-digit business code from the instructions | Your business description. Use the same code every year |
F: Accounting method | Cash or accrual | How your books are kept. Most solo service firms use cash |
I / J: 1099 questions | Whether you made payments requiring 1099s, and whether you filed them | Contractor payments and 1099-NEC filings. Answering "yes" to I and "no" to J invites questions |
1: Gross receipts | All business income for the year | Income accounts in your profit and loss, reconciled to every 1099-NEC and 1099-K you received |
9: Car and truck expenses | Business miles × standard rate, or actual costs × business use percentage | Mileage log. Do not include commuting miles |
11: Contract labor | Payments to contractors | Contractor expense account. Should tie to 1099-NECs you filed |
13: Depreciation and Section 179 | Depreciation on business assets | Form 4562 |
17: Legal and professional services | Accountant, attorney, and consultant fees | Professional fees account |
18 / 22: Office expense and supplies | Office costs and small equipment, including items under the $2,500 de minimis election | Office and supplies accounts |
24a / 24b: Travel and meals | Travel in full. Business meals at 50% | Travel and meals accounts. Halve meals before entering |
26: Wages | Pay to W-2 employees, not yourself | Payroll register. Owner draws never go here |
27b: Other expenses | Totals from Part V, such as software subscriptions, bank fees, and education | Other expense accounts, listed by category in Part V |
30: Home office | Simplified method, or actual expenses from Form 8829 | Square footage records or Form 8829 |
31: Net profit or loss | Line 29 minus line 30 | Calculated. Should match the net profit in your books after tax adjustments |
Worked example: a solo marketing consultant's 2026 return
Item | Amount | Line |
|---|---|---|
Client payments reported on 1099-NECs | $140,000 | 1 |
Card and Stripe payments from other clients | $45,000 | 1 |
Gross receipts | $185,000 | 1 |
Freelance designer (1099-NEC filed) | $18,000 | 11 |
Accountant and legal fees | $3,500 | 17 |
Laptop under the de minimis election | $2,200 | 22 |
Business meals: $4,000 spent, 50% deductible | $2,000 | 24b |
Mileage: 3,000 miles at 72.5 cents plus 2,000 miles at 76 cents | $3,695 | 9 |
Software subscriptions | $6,000 | 27b |
Total expenses | $35,395 | 28 |
Tentative profit | $149,605 | 29 |
Home office: 200 sq ft × $5 | $1,000 | 30 |
Net profit | $148,605 | 31 |
A common trap: if one client paid by card and also sent a 1099-NEC, the same income can appear on both forms. Record each payment once in your books, then reconcile your income accounts to both sets of forms rather than adding the forms together.
Your Schedule C prep checklist
When | Task |
|---|---|
December | Finalize the mileage log, confirm business and personal accounts are separate, and collect W-9s from contractors |
January 15 | Make the fourth-quarter estimated tax payment |
February 1 | File 1099-NECs for contractors paid $2,000 or more. Watch for 1099-NECs and 1099-Ks you receive |
February | Reconcile gross receipts to every 1099 received. Close the books for the year |
March | Finalize the depreciation schedule and home office figures with your CPA |
April 15 | File, or extend and pay what you expect to owe |
Common mistakes to avoid
Gross receipts below the 1099 totals. This is the fastest route to an automated IRS mismatch notice. Reconcile before filing and keep the reconciliation.
Deducting owner draws or health insurance on Schedule C. Draws are not expenses. Self-employed health insurance is deducted on Schedule 1, not Schedule C.
Deducting 100% of meals. Business meals are generally 50% deductible. Enter the reduced amount on line 24b.
Claiming a home office that is not used exclusively for business. A desk in the guest room does not qualify. The space must be used regularly and only for business.
Skipping estimated payments. Schedule C income has no withholding. Paying everything in April usually triggers an underpayment penalty.
If you file late or get it wrong
Because Schedule C is part of your Form 1040, late filing and late payment penalties apply to the whole return, along with interest. If income is understated, you owe the extra tax plus interest, and a 20% accuracy-related penalty may apply. To correct an error after filing, file Form 1040-X with a revised Schedule C.
Solo attorney callout
Solo law practices often get two items wrong on Schedule C. Client funds held in an IOLTA trust account are not gross receipts until earned and transferred to the operating account. And filing fees or expert costs you advance for clients and expect to be repaid are generally receivables, not deductible expenses. Keep trust activity and cost advances in separate accounts, as covered in our IOLTA trust account compliance guide. Confirm the treatment of specific items with your CPA before relying on these notes.
Frequently asked questions
Do single-member LLCs file Schedule C?
Yes, by default. The IRS treats a single-member LLC as a disregarded entity, so its income goes on the owner's Schedule C. The exception is an LLC that has elected to be taxed as an S corporation or C corporation.
Do I need Schedule C for a small amount of freelance income?
Yes. All business income must be reported, whatever the amount and whether or not you received a 1099. Self-employment tax applies once net earnings reach $400.
Should I switch from Schedule C to an S corporation?
It can reduce self-employment tax once your profit is well above a reasonable salary for your work, but it adds payroll and a separate business return. Run the numbers with your CPA. If it makes sense, our Form 2553 guide covers the election.
Related reading:
Schedule SE explained: how to calculate your self-employment tax
Safe harbor rules for small taxpayers: a simpler way to handle taxes
AI-powered. Experts in the Loop. Numetix reconciles your income to every 1099 you receive and keeps expenses coded to Schedule C categories all year, so your CPA gets a return-ready profit and loss instead of a shoebox. Explore Numetix bookkeeping.
Always consult your CPA for advice specific to your situation and your business return.
This article is for informational purposes only and does not constitute formal legal or tax advice. Always consult a qualified tax professional regarding your specific situation.
Numetix is an AI-first accounting firm. AI runs the bookkeeping, tax, payroll, and reporting workflow. Industry experts handle the judgment, month-end close, review, and advisory. We serve founder-led service firms across law, consulting, IT, healthcare, creative, and nonprofit. Headquartered in California, serving clients nationwide.
Suggested Readings
How to fill out Form 2553 for 2026: S corporation election instructions
The 4 tax return errors quietly draining service firms before an expert steps in
Year-End Close Checklist for Service Firms: 15 Steps Before December 31 (and What to Do Before January 15)
Fractional CFO for marketing agencies: When to hire one and what the role should deliver
How to read a profit and loss statement as a service firm owner
Insurance agency accounting software: What to look for beyond QuickBooks and your AMS
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