Schedule C other expenses are the ordinary, necessary business costs that don’t fit any of the labeled expense lines on the form. You itemize each one in Part V, total them on Line 48, and carry that total to Line 27b of Part II. Starting with the 2025 tax year, the IRS moved this total from Line 27a to Line 27b, so filers working from older instructions need to adjust.
What Belongs on Line 27b Instead of Lines 8 Through 26
Schedule C splits business expenses into two groups. Part II Lines 8 through 26 cover categories the IRS expects most businesses to have: advertising, rent, utilities, insurance, legal fees, taxes and licenses, and so on. If a cost clearly belongs on one of those lines, it goes there.
Line 27b catches the rest. These are still “ordinary and necessary” business expenditures directly connected with your trade or business. They just lack a designated line on the form. They carry the same legal weight as any expense on Lines 8 through 26.
One reporting note worth flagging up front: Line 27a is now reserved for the energy efficient commercial buildings deduction, which is claimed through Form 7205. Other expenses from Part V flow to Line 27b.
Common Expenses That Go in Part V
The range of costs that land here is broad. These categories come up most often for sole proprietors and single-member LLCs.
Bank and Payment Processing Fees
Monthly bank service charges, merchant processing fees, payment gateway costs, and wire transfer fees all belong here. They’re routine costs of running a business account and taking customer payments, but they don’t fit under interest, supplies, or any other labeled line.
Business Gifts
Gifts to clients, vendors, or business contacts are deductible, but capped at $25 per recipient per year. Items costing $4 or less with your business name permanently imprinted don’t count toward the limit. Spouses share a single $25 cap when they both give to the same person.
Licenses and Regulatory Fees
Line 23 covers many state and local license fees, but not all of them. Annual LLC registration fees, industry-specific permits, and professional license renewals often land in Part V. The Schedule C instructions note that certain licenses, such as liquor licenses, may need to be amortized rather than expensed in a single year.
Start-Up and Organizational Cost Amortization
New businesses can deduct up to $5,000 in start-up costs and a separate $5,000 in organizational costs in the year the business begins. Each $5,000 allowance phases out dollar-for-dollar once that category exceeds $50,000. The remaining balance gets amortized over 180 months, and the annual amortization amount is reported as an other expense in Part V.
Education and Professional Development
Courses, seminars, certifications, books, and conference fees are deductible when the education maintains or improves skills you already use in your business. Education that qualifies you for a new trade or business, or that meets the minimum requirements to enter your current field, is not deductible. A freelance web developer taking an advanced JavaScript course qualifies. The same developer attending law school does not.
Software Subscriptions and SaaS Fees
Recurring subscriptions for cloud-based software you use in the business, such as accounting platforms, project management tools, or design applications, are generally deductible in full in the year you pay them. Schedule C has no dedicated software line, so these go in Part V. One-time purchases of software with a perpetual license may need to be capitalized and amortized, especially if the cost is substantial.
Specialized Work Clothing
Uniforms and protective clothing are deductible when the clothing is required for your work and not suitable for everyday wear. Safety gear, branded uniforms with company logos, and occupation-specific items like hard hats or steel-toed boots qualify. A business suit does not, even if you only wear it for work.
Bad Debts
When a customer owes you money for goods or services you already reported as income, and the debt becomes worthless, that loss is an other expense. You can only deduct bad debts for amounts you previously included in income. If you never reported the sale as income, there’s no deduction to take.
Other Recurring Items
Trade association dues, industry journal subscriptions, minor repairs that don’t rise to the level of capital improvements (replacing a broken monitor, for example), and business-related subscriptions also belong in Part V. The test is always the same: is the expense ordinary and necessary for your business, and does it lack a home on Lines 8 through 26?
How to Report Them in Part V
The reporting process has two steps, and both are mandatory.
First, itemize every other expense individually in Part V. List each expense on its own line with a description and dollar amount. The IRS instructions direct you to list the type and amount of each expense separately. A single “miscellaneous” line or lump sum does not satisfy this.
Second, total everything in Part V on Line 48, then carry that total to Line 27b in Part II. That number feeds your overall expense calculation and reduces your net profit on Line 31.
Be specific with descriptions. “Software” is vague. “QuickBooks subscription — $360” and “Adobe Creative Cloud — $660” tell the IRS exactly what they’re looking at. Clear descriptions reduce follow-up questions and audit flags.
What Does Not Belong on Schedule C
Some costs look like business expenses but aren’t deductible on Schedule C. Mixing them in with legitimate deductions is one of the fastest ways to trigger problems.
- Personal expenses. Federal tax law prohibits deducting personal, living, or family expenses. Commuting from home to your regular workplace, personal gym memberships, and groceries do not become business expenses because you’re self-employed.
- Capital expenditures. Assets with a useful life beyond the current year, such as equipment, vehicles, or furniture, must be capitalized and recovered through depreciation on Form 4562 or through a Section 179 election. Items costing $2,500 or less per invoice may qualify under the de minimis safe harbor election, letting you deduct them as current expenses instead of capitalizing them.
- Government fines and penalties. Amounts paid to a government entity for violating any law are not deductible, whether paid voluntarily, by agreement, or through a court order.
- Charitable contributions. Donations to charity do not go on Schedule C. If you itemize on your personal return, they go on Schedule A.
The capital expense boundary trips up filers most often. Buy a $3,000 laptop and the instinct is to expense it. Unless you make a Section 179 election on Form 4562 or qualify under the de minimis safe harbor, that laptop needs to be depreciated over its useful life.
Records You Need to Keep
The IRS doesn’t require you to attach receipts to your return, but you must have them if the agency ever asks. The burden of proof for every deduction is yours.
Keep receipts, invoices, bank statements, and any other documentation showing the amount, date, and business purpose of each expense. The IRS generally requires you to retain records for at least three years from the date you filed the return, or two years from the date you paid the tax, whichever is later.
Digital records are acceptable, but the storage system must keep documents legible, maintain controls against unauthorized changes or deletion, and let you produce paper copies if requested during an examination. A well-organized cloud storage system or bookkeeping app works. Tossing receipts into an unsorted folder does not. Scans need to be clear enough to read every number and letter, and files need a backup.
What a Bad Claim Costs
Claiming personal expenses as business costs or inflating deductions carries a specific penalty. If the IRS determines you substantially understated your income tax, you owe an additional 20% of the underpayment. An understatement is substantial when it exceeds the greater of 10% of the tax that should have been on the return, or $5,000. The same 20% penalty applies to underpayments caused by negligence or disregard of tax rules.
For most sole proprietors, the realistic risk isn’t fraud charges. It’s a routine audit where you can’t substantiate what you claimed. An expense listed in Part V with no receipt, no bank statement, and no credible explanation gets disallowed. That raises your taxable income, triggers additional income tax and self-employment tax, and can push the shortfall past the substantial understatement threshold and its 20% add-on.
Why Accurate Reporting Pays
Every legitimate expense on Schedule C does double duty. It reduces your income tax and your self-employment tax, because both calculations start from net profit on Line 31.
Self-employment tax runs at 15.3%: 12.4% for Social Security and 2.9% for Medicare. For 2026, the Social Security portion applies to the first $184,500 in combined wages and net self-employment earnings, and the Medicare portion has no cap. An extra $1,000 in legitimate other expenses saves roughly $153 in self-employment tax alone, before any income tax savings.
One small offset: Schedule C profit also determines qualified business income for the Section 199A deduction, which allows eligible sole proprietors to deduct up to 20% of qualified business income. Higher expenses reduce QBI, which trims the Section 199A deduction slightly. For most sole proprietors below the income thresholds, the net effect of claiming every legitimate deduction is still strongly positive.