--- title: "Small business tax deductions and records | Ledgerbrook" source: https://ledgerbrook.com/blog/small-business-tax-deductions/ description: "Small business tax deductions: the IRS test each must pass, its 2026 limit, and the record that proves it, by entity type." --- [Blogs](/blog/) # Small business tax deductions and records ![](/_astro/omkar-moraye.BHiWb4KG_xH3b5.webp) [Omkar Moraye](/about/) · October 27, 2026 · Updated October 29, 2026 [](https://www.linkedin.com/sharing/share-offsite/?url=https%3A%2F%2Fledgerbrook.com%2Fblog%2Fsmall-business-tax-deductions%2F%3Futm_source%3Dlinkedin%26utm_medium%3Dsocial%26utm_campaign%3Dshare)[](https://x.com/intent/post?url=https%3A%2F%2Fledgerbrook.com%2Fblog%2Fsmall-business-tax-deductions%2F%3Futm_source%3Dx%26utm_medium%3Dsocial%26utm_campaign%3Dshare&text=Small%20business%20tax%20deductions%20and%20records)[](https://www.facebook.com/sharer/sharer.php?u=https%3A%2F%2Fledgerbrook.com%2Fblog%2Fsmall-business-tax-deductions%2F%3Futm_source%3Dfacebook%26utm_medium%3Dsocial%26utm_campaign%3Dshare)[](mailto:?subject=Small%20business%20tax%20deductions%20and%20records&body=Small%20business%20tax%20deductions%20and%20records%0A%0Ahttps%3A%2F%2Fledgerbrook.com%2Fblog%2Fsmall-business-tax-deductions%2F%3Futm_source%3Demail%26utm_medium%3Dsocial%26utm_campaign%3Dshare) ## What can a small business write off? A small business can deduct any expense that is ordinary and necessary for the business: rent, software, supplies, insurance, contractors, wages, interest, travel and 50% of most business meals. Each one needs a record showing what was bought, when, how much and why. A deduction without that record is the first thing an IRS examination removes. Small business tax deductions are not a list of items the IRS approves in advance. There is one test, written into IRC §162, and every expense either passes it or does not: the cost must be ordinary and necessary for the business. Lists of “17 write-offs” are examples of that test. What the lists leave out is the second half, the part that decides whether a deduction survives a question from the IRS: the record behind it. This post gives both for each common deduction, with the 2026 limit where there is one, read from IRS publications and the draft 2026 form instructions. It covers sole proprietors and single-member LLCs filing Schedule C, and the differences for an S corporation. Ledgerbrook keeps books and does not prepare returns or give tax advice; the CPA or enrolled agent who signs the return decides what is claimed. ## What counts as a tax write-off for a small business? A write-off is an expense the business can subtract from its income before tax. IRS Publication 334 states the test: “An ordinary expense is one that is common and accepted in your field of business. A necessary expense is one that is helpful and appropriate for your business. An expense does not have to be indispensable to be considered necessary” ([Pub. 334](https://www.irs.gov/publications/p334), for 2025 returns). Three more rules sit on top of the test: - **Business and personal are split.** If a cost is partly personal, Pub. 334 says to “separate the personal part from the business part,” and the personal part is generally not deductible. A phone used 60% for business is 60% deductible. - **Some costs are spread over years.** Equipment, vehicles and improvements are capitalized and depreciated, unless an election such as section 179 or the de minimis safe harbor lets them be deducted at once. - **Some costs have a statutory limit.** Meals, gifts, home office and vehicles have their own rules, listed below. Deductions are not tax credits. A $1,000 deduction lowers taxable income by $1,000; what it saves in tax depends on the owner’s bracket and, for a sole proprietor, self-employment tax. ## Common deductions, the test, the limit and the record | Deduction | What has to be true | 2026 limit | The record that proves it | | --- | --- | --- | --- | | Rent for business space | The space is used for the business | None | Lease and payment record | | Software and subscriptions | Used to run the business | None, unless it must be capitalized | Vendor billing history | | Supplies | Used up in the business during the year | None | Receipt or invoice showing items bought | | Advertising | Promotes the business | None | Platform invoices or receipts | | Insurance (business) | Covers the business, not the owner’s health or lost earnings | None | Policy declarations page and payments | | Contract labor | Payment to a non-employee for business services | None; Form 1099-NEC for $2,000 or more paid in 2026 | Invoice, W-9, the 1099-NEC | | Wages | Reasonable pay to employees for services | None | Payroll reports, W-2s, 941s | | Interest | On debt used for the business, traced by how the loan was spent | The business interest limit (Form 8990) generally applies only to businesses over the small business gross receipts test | Lender statement, loan agreement | | Legal and professional fees | For the business, including business tax preparation | None | Invoice describing the work | | Business meals | A business contact present, not lavish, owner or employee present | 50% of cost | Receipt with restaurant, date, amount and number of people, plus who and why | | Travel away from home | Overnight, away from the tax home, for business | Lodging and transport in full; meals at 50% | Receipts, itinerary, business purpose | | Business gifts | Given to a business contact; employee gifts are wages or tax-free, see [holiday gifts and bonuses](/blog/holiday-gifts-and-bonuses-taxes/) | $25 per recipient per year | Receipt, recipient name, business relationship | | Vehicle | Business share of use | Standard mileage 72.5 cents (Jan 1 to Jun 30) or 76 cents (Jul 1 to Dec 31); or actual expenses | Mileage log with date, destination, purpose and miles | | Home office | Used regularly and exclusively for business | Simplified method $5 per square foot up to 300 square feet | Floor measurements, photos, home expense records | | Equipment | Used in the business more than 50% for section 179 | $2,560,000 section 179; phased out above $4,090,000 | Purchase invoice, placed-in-service date | | Small purchases under the de minimis election | Expensed in the books as well | $2,500 per item or invoice | Invoice; the election statement on the return | | Startup costs | Incurred before the business opened | $5,000, reduced above $50,000 total | Receipts and the date the business began | | Retirement contributions | Plan in place, contribution made by the deadline | Plan-specific limits | Plan documents, deposit records | Sources: business meal conditions, the mileage rates, the home office method, startup costs and the de minimis limits are from the [2026 Instructions for Schedule C](https://www.irs.gov/pub/irs-dft/i1040sc--dft.pdf) (draft dated October 8, 2026). The gift limit is from [Pub. 463](https://www.irs.gov/publications/p463). The section 179 figures are from Rev. Proc. 2025-32, explained in [Section 179 vs bonus depreciation](/blog/section-179-vs-bonus-depreciation/). Retirement plan limits are in [year-end tax planning](/blog/year-end-tax-planning/). Where each of these lands on the return, line by line, is in [Schedule C expense categories](/blog/schedule-c-expense-categories/). Expenses sitting in Uncategorized or Ask My Accountant, months after they were paid? That is a cleanup, not a one-off fix: $99 per month of backlog (20% off 6+ months), one fixed price agreed before any work starts. [Send the file for a free 48-hour review](/contact/?from=blog%2Fsmall-business-tax-deductions). ## What expenses are 100% deductible? Most ordinary operating costs are deducted in full in the year paid: rent, software, supplies, advertising, business insurance, contractors, employee wages, professional fees, business-only phone and internet, and travel lodging and airfare. The exceptions are the costs with a limit in the table above (meals, gifts, vehicles and anything used partly for personal purposes) and the costs that must be depreciated. Meals bought as part of what the business sells, such as food a caterer buys for customers, are a cost of the product, not a 50% meal. ## What assets are eligible for an immediate write-off? Three routes let a business deduct an asset’s cost in the year it is placed in service instead of over its recovery period: 1. **[The de minimis safe harbor](/blog/de-minimis-safe-harbor/):** tangible items of $2,500 or less per item or invoice, elected each year and expensed the same way in the books. 2. **Section 179:** most equipment, machinery, computers, off-the-shelf software and certain vehicles, up to $2,560,000 for 2026, limited to business income. Heavy vehicles have their own rules in [Section 179 for vehicles](/blog/section-179-vehicles/). 3. **Bonus depreciation:** 100% for qualified property acquired and placed in service after January 19, 2025. Land never qualifies, and buildings generally do not. Which route suits a given asset is a decision for the preparer, made at year end with the asset register in hand. ## LLC tax deductions An LLC has no deduction list of its own, because an LLC is not a tax category. It deducts what its tax classification allows: - **Single-member LLC (the default):** disregarded for income tax, so the owner reports everything on Schedule C as a sole proprietor. The owner is not an employee: draws are not wages and not deductible, and the owner’s health insurance and retirement contributions are claimed on the owner’s Form 1040 (Schedule 1), not as business expenses. - **Multi-member LLC (the default):** taxed as a partnership on Form 1065. Payments to members for services are guaranteed payments, deductible by the partnership and reported to the member on their K-1. Members are not W-2 employees. - **LLC that elected S corporation status:** follows the S corporation rules below. Which classification the LLC has is on its first returns and in any Form 8832 or 2553 it filed. The bookkeeping that follows from each is in [bookkeeping for an LLC](/blog/bookkeeping-for-llc/). ## S corp tax deductions An S corporation deducts the same ordinary and necessary expenses at the corporate level, on Form 1120-S. Three items work differently because the owner is also an employee. ### Reasonable salary for the owner Wages paid to a shareholder-employee are deductible, along with the employer’s payroll taxes on them. The IRS says S corporations “must pay reasonable compensation to a shareholder-employee in return for services” before taking non-wage distributions. The factors it lists include training and experience, duties, time devoted to the business, and what comparable businesses pay ([IRS: S corporation compensation and medical insurance issues](https://www.irs.gov/businesses/small-businesses-self-employed/s-corporation-compensation-and-medical-insurance-issues)). Distributions are not deductible. How the salary is set, and the 60/40 and 70/30 rules of thumb, are in [S corp bookkeeping](/blog/s-corp-bookkeeping/). ### Health insurance for a more-than-2% shareholder The S corporation can deduct health insurance premiums it pays for a shareholder who owns more than 2%, and the premiums are added to that shareholder’s W-2 wages in box 1. The shareholder may then claim an above-the-line deduction on their own return if the coverage was established by the S corporation and the other requirements are met. Under Notice 2008-1, a policy the shareholder buys and pays for personally does not qualify unless the S corporation pays or reimburses the premium and reports it as compensation. [S corp owner health insurance](/blog/s-corp-owner-health-insurance/) covers the 2% rule, the W-2 and the entries. ### The accountable plan An owner who pays business costs personally, for a home office, a personal cell phone or mileage in a personal car, cannot simply deduct them as an employee: Pub. 463 calls unreimbursed employee expenses a miscellaneous deduction “that is no longer allowable due to the suspension of miscellaneous itemized deductions subject to the 2% floor under section 67(a)” (for 2025 returns). The corporation can reimburse them under an accountable plan instead, which makes the reimbursement deductible to the S corporation and keeps it out of the owner’s wages. Pub. 463 sets three rules, all required: 1. **Business connection.** The expenses were paid or incurred while performing services for the employer. 2. **Adequate accounting.** The employee substantiates the expenses to the employer within a reasonable period. 3. **Return of excess.** Any amount paid beyond the substantiated expenses goes back within a reasonable period. The publication treats as reasonable an advance within 30 days of the expense, accounting within 60 days after it was paid, and returning any excess within 120 days. In the books, each reimbursement needs the owner’s expense report and receipts attached, and posts to the expense account it would have hit had the company paid directly. A round monthly “home office allowance” with no report behind it fails rule 2 and is treated as wages. A worked example and the year-end catch-up are in [accountable plan for an S corp](/blog/accountable-plan-s-corp/). ### Deductions on the owner’s return, not the books Some items owners hear about as “S corp deductions” are claimed on the shareholder’s Form 1040, not in the business’s books: the qualified business income deduction (Form 8995 or 8995-A), charitable contributions passed through on the K-1, and the shareholder’s own retirement contributions outside a company plan. The books supply the numbers; the deduction happens on the personal return. Rent an S corp pays its owner for meetings at the owner’s home works the other way: the company deducts it and the owner may exclude it, as explained in [the Augusta rule](/blog/augusta-rule/). ## What is not deductible, and why it still shows up in the books Pub. 334 lists expenses a business usually cannot deduct, among them charitable contributions, entertainment, club dues, lobbying, political contributions, fines and penalties paid to a government for breaking the law, and “personal, living, and family expenses.” Federal income tax, including self-employment tax, is not deductible on Schedule C either. These still turn up as expenses in owners’ books because they leave the business account. A speeding ticket paid on the business card, a quarterly estimated tax payment, a golf club membership and a family dinner all land in the bank feed beside real expenses, and a bank rule that books every card charge to an expense account deducts them all. The fix is in the coding, not the return: post them to owner’s draw (or, for an S corporation, to shareholder distributions or a shareholder loan), and keep a separate non-deductible account for any fine or penalty the business itself owes, so the preparer sees it. ## Common questions about small business deductions ### Who is eligible for the $6,000 tax break? That is a deduction for individuals aged 65 or older, claimed on the personal return; it has nothing to do with business expenses and is outside this post. ### What is the most I can claim on tax without receipts? There is no dollar amount the IRS lets a business deduct with no records. A receipt can be replaced by other evidence, and some travel and vehicle costs under $75 do not need the receipt itself, but every deduction needs proof of the amount and the business purpose. What counts as proof is in [audited without receipts](/blog/audited-without-receipts/), and the everyday system is in [how to organize business receipts](/blog/organize-business-receipts/). ### Can I deduct car loan interest on my taxes? The business-use share of interest on a vehicle loan is a business deduction. For 2026, Schedule C reports it on its own line, 16b, whether the owner uses the standard mileage rate or actual expenses. The personal-use share may qualify for a separate deduction on Schedule 1-A for certain new passenger vehicles, but the same interest cannot be claimed on both. ### What deductions are easy to miss? The ones that never pass through the business bank account: business purchases on a personal card, mileage driven in a personal car, a home office, and business software billed to a personal email. None of them reach the books unless someone enters them, so none of them reach the return. ## When deductions are stuck in Uncategorized Every deduction above starts as a coded transaction. When a year’s expenses sit in Uncategorized Expense or Ask My Accountant, the preparer either spends billable hours sorting them or leaves them off. A cleanup codes each transaction to the right account, attaches the record behind it, separates the owner’s personal and tax payments, and reconciles the accounts, so the deductions on the return are the ones the books can prove. $99per month of backlog20% off 6+ months > **When to hand this off:** if Uncategorized Expense or [Ask My Accountant](/fixes/ask-my-accountant/) holds a balance from more than one month, or personal and business spending share an account, the deductions cannot be sorted from the return side. A [free file review](/contact/?from=blog%2Fsmall-business-tax-deductions) sizes the cleanup before work begins. What the work covers is on the [QuickBooks cleanup](/quickbooks-cleanup/) page. Ledgerbrook Behind on your QuickBooks books? Cleanup or catch-up $99 per month of backlog, 20% off 6+ months Turnaround 5 business days for a typical year Monthly close From $149 a file a month [Get a free file review](/contact/?from=blog%2Fsmall-business-tax-deductions) Free, no card, no obligation. A written answer within about 48 hours. [See every price](/pricing/) [![](/_astro/omkar-moraye.BHiWb4KG_2p9N2A.webp)Omkar MorayeQuickBooks Certified ProAdvisor](/about/) - [![Intuit QuickBooks Certification Level 1](/_astro/level-1.BokmyvzE_Z2cyGo6.webp)](https://www.credly.com/badges/7ceaf1c4-83da-4a1b-b19f-7e15cb5c0ac7/public_url "Intuit QuickBooks Certification Level 1. Verify on Credly.") - [![Intuit QuickBooks Certification Level 2](/_astro/level-2.D-GWLUNI_Z1Sh5RD.webp)](https://www.credly.com/badges/02426568-00bb-46e1-a939-9063497c54d6/public_url "Intuit QuickBooks Certification Level 2. 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