This article is for general informational purposes and doesn’t constitute tax, legal, or accounting advice. Deduction rules, dollar limits, and mileage rates change, and how they apply depends on your business structure and circumstances. Confirm current details with the IRS, the New York State Department of Taxation and Finance, or a qualified professional before acting on them.
Tax season has a way of sneaking up on small business owners. One month you’re focused on customers, payroll, and keeping the lights on. The next, you’re staring at a shoebox of receipts, wondering what actually counts.
“What can I actually write off?” is one of the most common questions small business owners bring to an accountant, and it’s a fair one. Plenty of owners leave money on the table simply because nobody ever walked them through it plainly.
So let’s do that here: no jargon, no sales pitch, just a clear look at small business tax deductions, how they work, and where New York’s rules change the math. (Looking for personal deductions like mortgage interest or property taxes on your home? Those are covered in our tax deductions checklist for Buffalo residents.)
Small Business Deductions at a Glance
A business expense is generally deductible if it’s ordinary and necessary for your trade. The most common categories are home office, vehicle and mileage, wages and contractor payments, equipment, supplies and software, marketing, professional fees, travel and meals (generally 50%), insurance, and rent and utilities.
Deductions lower your taxable income, not your tax bill dollar for dollar. New York starts from your federal numbers but doesn’t follow every federal rule, and good records are what make any deduction hold up.
What Counts as a Deductible Business Expense?
The IRS uses a simple test: an expense has to be ordinary and necessary for your trade or business. Ordinary means it’s common and accepted in your type of work. Necessary means it’s helpful and appropriate for running the business. It doesn’t have to be indispensable.
That’s it. It doesn’t have to be something every business uses; a food truck owner and a graphic designer will have very different expense lists, and both can be legitimate.
Here’s the part people miss: deductions reduce your taxable income, not your tax bill dollar for dollar. If a $1,000 deduction reduces income taxed at a 22% federal bracket, the federal savings is roughly $220, not $1,000. Your actual savings depend on your overall tax situation, including self-employment tax and New York State tax. Still worth claiming, but it helps to set realistic expectations before you start counting.
Home Office Deduction
Plenty of Buffalo entrepreneurs run their business from a spare bedroom, a basement office, or a converted garage. If that’s you, the home office deduction might apply. The space generally needs to be used regularly and exclusively for business, not the kitchen table you also eat dinner at every night.
You can calculate it two ways. The simplified method uses a flat $5 per square foot of office space, up to 300 square feet. The regular method uses the business percentage of your actual home expenses, such as utilities, insurance, repairs, and mortgage interest or rent, plus depreciation if you own. Neither is automatically better. In an older Buffalo house with high heating bills, the regular method sometimes comes out ahead, but it’s worth running the numbers rather than guessing.
Vehicle and Mileage Expenses
If you drive for business, such as deliveries, job sites, or client meetings, vehicle costs are one of the most commonly claimed small business deductions. You have two options: track actual expenses (gas, repairs, insurance, depreciation) for the business-use share, or use the IRS standard mileage rate.
The rate changes, so always check the current one. The 2026 business rate started the year at 72.5 cents per mile, and the IRS raised it mid-year, so use the rate that applies to the dates you drove. One timing rule trips people up: if you own the vehicle and want the standard mileage rate, you generally have to choose it in the first year the vehicle is used for business.
Most small business owners find mileage tracking simpler, especially with a phone app logging trips automatically. Just keep in mind that commuting doesn’t count. Driving from home to your regular place of business is personal. It’s the driving you do for the business, between job sites, to suppliers, and to client meetings, that qualifies.
Quick Questions: Proof and Personal Use
Do I need receipts for every deduction I claim?
Ideally, yes. The IRS expects you to be able to prove your expenses, especially larger ones. A bank or credit card statement shows that you paid, but a receipt or invoice showing what was purchased and why is much stronger backup if you’re ever asked.
Can I deduct my cell phone bill?
Only the business-use portion. If you use one phone for both personal and business calls, deduct a reasonable percentage based on actual use, not the entire monthly bill.
Employee Wages, Benefits, and Contractor Payments
If people work for you, whether W-2 employees or 1099 contractors, those payments are generally deductible. That includes wages, the employer share of payroll taxes, health insurance contributions, and retirement plan contributions you make on their behalf.
A common trap for newer business owners is treating employees as contractors to avoid payroll taxes. It might look like a shortcut, but it creates real exposure if the IRS or New York State disagrees with the worker classification later. In construction, New York’s Fair Play Act raises the stakes further; our guide to accounting for contractors in Buffalo covers that in detail.
Equipment, Tools, and Section 179
Buying equipment, whether a new oven for a bakery, a laptop for a consulting business, or tools for a contracting crew, is generally deductible. Sometimes the full cost can be written off in the year you place it in service rather than spread over several years. Two federal provisions make that possible: Section 179 expensing and bonus depreciation. Both can make a real difference for a growing business that’s reinvesting in itself.
Here’s where New York matters: New York State doesn’t allow federal bonus depreciation for most property. If you take it federally, you’ll make an adjustment on your state return using Form IT-398, which means your New York deduction may be smaller in year one than your federal one. National online tax tools don’t always explain that difference clearly.
Section 179 dollar limits change from year to year, so rather than quote a number that may be outdated by the time you read this, our advice is simple: before a big purchase, check the current-year limit in IRS Publication 946 or ask your accountant how it applies to you. Timing matters too; our year-end tax planning checklist explains why equipment has to be placed in service, not just ordered, before December 31.
Office Supplies, Software, and Subscriptions
This is one of the easiest categories to track and one of the easiest to under-claim. Paper, printer ink, software subscriptions, cloud storage, point-of-sale systems, and accounting tools all typically qualify if you use them to run the business. Small recurring costs add up over twelve months, so keep a dedicated folder or spreadsheet just for them.
Marketing and Advertising Costs
Website hosting, business cards, ads, signage, and many other marketing costs can be deductible when they’re ordinary and necessary for the business.
This matters for Buffalo small businesses trying to build local visibility, whether that’s sponsoring a Little League team in West Seneca or running ads targeted at nearby neighborhoods. The cost of getting your name in front of local customers is a legitimate cost of doing business, and it should be tracked like any other expense.
Not Sure Which Deductions Apply to You?
KD Accounting & Tax helps Buffalo small business owners sort out what’s deductible, what’s not, and how federal and New York rules apply to their numbers.
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Fees paid to accountants, bookkeepers, attorneys, and consultants for business work are deductible too, which, yes, includes what you pay a firm like ours. Some owners hesitate to claim these, thinking it seems indulgent. It isn’t. Getting your books done right or your business structured properly is a normal operating cost, not a luxury.
Business Travel and Meals
Travel away from home for business, such as flights, hotels, and getting to an out-of-town conference, is generally deductible. Meals work differently: business meals are generally 50% deductible, not 100%, and they need a clear business purpose. A dinner with a client where you discuss a project qualifies. A meal that’s really personal doesn’t, even if you talk shop for five minutes. Entertainment, like game tickets or a round of golf with a client, is generally not deductible at all.
Insurance Premiums
Business liability insurance, commercial property insurance, and business vehicle coverage are generally deductible. For self-employed owners, health insurance premiums may be deductible as well. The rules vary depending on how your business is structured (sole proprietor, LLC, or S corporation), so they aren’t identical for everyone.
Quick Questions: Self-Employed Owners
Can I deduct health insurance if I’m self-employed?
Often, yes. Self-employed individuals may be able to deduct health insurance premiums for themselves, their spouse, and dependents. One key condition: you generally can’t take the deduction for any month you were eligible for a subsidized health plan through your own or your spouse’s employer.
Are business losses deductible against other income?
In many cases, yes. Sole proprietors and owners of pass-through businesses can often use a business loss to offset other income, such as a spouse’s wages. Limits apply, including basis, at-risk, passive activity, and excess business loss rules, so how much you can use depends on your situation.
Rent and Utilities for Business Space
If you lease a storefront, office, or warehouse anywhere in the Buffalo area, that rent is deductible, along with the utilities that come with running the space. Smaller costs count too, such as trash pickup or a shared maintenance fee for a commercial unit.
Keeping Records That Actually Hold Up
None of these deductions matter much if you can’t back them up. Keep receipts. Keep a simple mileage log. And keep business and personal money in separate accounts. That one habit prevents a lot of confusion at filing time, and our post on how mixing personal and business expenses affects your tax filing explains why.
A shoebox full of paper isn’t a system, but it’s better than nothing. A basic spreadsheet or bookkeeping app is better still, and if you’d rather not do it yourself, professional bookkeeping services in Buffalo keep deductible expenses categorized as they happen instead of reconstructed in April.
Common Mistakes to Avoid
Mixing personal expenses in with business ones. This creates problems if you’re ever asked to substantiate a claim, and it can cast doubt on legitimate deductions sitting next to it.
Missing deductions you never tracked. Home office square footage, mileage, and small recurring subscriptions are the usual suspects.
Claiming too aggressively without documentation. This is a bigger risk than under-claiming. The goal isn’t to find every possible loophole. It’s to claim everything you’re legitimately entitled to, with the paperwork to support it.
Forgetting that deductions affect estimated taxes. If your business is profitable, your expected deductions feed into your quarterly estimated tax payments. Underestimating your profit can mean penalties later.
Why Local Guidance Matters
Federal deductions are the foundation. New York’s personal income tax starts from your federal adjusted gross income, so most federal business deductions carry through to your state return, but not all of them. Bonus depreciation is the biggest example. Buffalo and Erie County businesses may also have local costs worth tracking, like license fees or industry-specific requirements, and property owners can look up their assessment details with our guide to property tax records in Buffalo.
A national online tax tool won’t always catch these state-level differences. Working with someone who understands both the federal rules and New York’s adjustments tends to catch more, and catch it earlier. That’s the core of what KD Accounting & Tax does: look at a business owner’s actual numbers and figure out what applies to them specifically, rather than handing out generic advice.
Getting Started
If you’re not sure whether you’re capturing all the small business tax deductions available to you, the simplest first step is to pull together last year’s expenses and have someone look them over. You may find deductions you’ve been missing, or find out you’ve been doing more right than you thought.
Get Your Business Return Done Right
From tracking deductions to filing federal and New York returns, the KD Accounting & Tax team in Buffalo can help you file with confidence.
See Tax Filing Services Call (716) 589-2665Frequently Asked Questions
Partly. You can generally deduct up to $5,000 of startup costs in the year your business begins, and that $5,000 is reduced dollar for dollar once total startup costs pass $50,000. The rest is deducted gradually over 180 months. If you’re just launching, our guide to registering and launching a business covers the first steps.
The home office deduction generally requires a space used regularly and exclusively for business. A kitchen table you also use for meals typically won’t qualify, but a spare room or a clearly separated corner used only for work might.
The IRS’s general rule is three years from filing, but some situations need longer. Employment tax records should be kept at least four years. Records are needed for six years if income was underreported by more than 25%, and seven years for a bad debt or worthless securities deduction. See the IRS’s guide on how long to keep records.
Generally at 50%, as long as there’s a clear business purpose and you keep a record of who attended and what was discussed. Entertainment expenses, like event tickets, are generally not deductible.
Mostly, because New York’s income tax starts from your federal figures, but not entirely. The most common difference is that New York doesn’t allow federal bonus depreciation for most property, so equipment purchases often need a state adjustment on Form IT-398.