Small Business Tax Tips: Maximise Savings and Reduce Your Tax Burden

When you work for someone else, taxes mostly take care of themselves. Money is withheld from every paycheck, a W-2 arrives in January, and the return is fairly simple. Once you run your own business, that changes. You're responsible for income tax, self-employment tax, possibly payroll taxes for employees, estimated payments throughout the year, and sometimes obligations in more than one state.

The upside is that business owners also have far more control over their tax bill. Almost any cost that's genuinely part of running the business can reduce taxable income, and the timing of purchases, payments, and elections can shift what you owe from one year to the next.

The owners who pay the least aren't using aggressive schemes. They know which expenses count, keep records that hold up, and make decisions before year-end instead of after it.

Most of the tax money small businesses lose comes from small, repeated gaps: the software subscription paid on a personal card, the mileage nobody logged, startup costs never deducted, or the quarterly payment that slipped. This guide focuses on closing those gaps.

Expert Perspective

This guide covers how business deductions work, what is and isn't deductible, commonly overlooked deductions, recordkeeping, year-end tax tips, and the mistakes that most often cost small businesses money. For the three biggest structural strategies, retirement plans, business structure, and a deeper look at deductions, see our guide to small business tax saving strategies.

The most underused deduction I see isn't anything exotic. It's the ordinary expenses owners pay personally and never bring into the books: the phone bill, a laptop bought before the business was formed, software on a personal card, business miles driven in the family car. Individually they look too small to bother with. Across a year, they often add up to thousands of dollars of deductions that were simply never claimed.

Ankit Sarawagi, CPA, CA, MBA · LinkedIn

How Business Deductions Work

To be deductible, a business expense generally must be both ordinary and necessary. An ordinary expense is one that's common and accepted in your line of business. A necessary expense is one that's helpful and appropriate for the business, even if it isn't strictly essential.

A deduction lowers your taxable income, not your tax dollar for dollar. What it saves depends on your tax rate. For a sole proprietor in the 22 percent federal bracket, a $1,000 business expense typically saves about $220 in income tax, plus around $140 in self-employment tax because it also reduces business profit.

That's also why buying something just for the write-off rarely makes sense. Spending $1,000 to save roughly $360 still leaves you $640 poorer. Deductions are valuable when they capture costs the business actually needs.

What Counts as a Deductible Business Expense?

Commonly Overlooked Deductions

Startup and Organizational Costs

Costs you paid before the business opened, such as market research, advertising before launch, and legal fees to form an LLC or corporation, can be deducted. You can generally deduct up to $5,000 of startup costs and up to $5,000 of organizational costs in your first year of business. Each $5,000 allowance is reduced once those costs exceed $50,000, and anything left over is amortized over 15 years.

Assets You Owned Before the Business Started

A computer, desk, camera, or vehicle you already owned and then started using for the business may be depreciable. The deductible basis is generally the lower of what you paid for it or its fair market value when you began using it for business.

The Qualified Business Income Deduction

Many owners of sole proprietorships, partnerships, LLCs, and S corporations can deduct up to 20 percent of qualified business income. The deduction was scheduled to expire after 2025, but legislation passed in 2025 made it permanent. It's claimed on your personal return, you don't need to itemize to take it, and limits apply at higher incomes, particularly for service businesses.

Self-Employed Health Insurance

If you're self-employed and pay your own health insurance, premiums for you, your spouse, and dependents can generally be deducted as an adjustment to income. You can't claim it for months you were eligible for an employer-subsidized plan, including through a spouse, and the deduction can't exceed your business profit.

Half of Self-Employment Tax

You can deduct half of your self-employment tax as an adjustment to income. It lowers your income tax, not the self-employment tax itself, and it's easy to miss if you prepare your own return without software.

Bank Fees, Merchant Fees, and Interest

Credit card processing fees, payment platform fees, business bank account charges, and interest on business loans and credit cards used for business purchases are all deductible.

Business Gifts

You can deduct up to $25 per recipient per year for business gifts. Incidental costs like engraving, packaging, and shipping don't count toward that limit.

Phone, Internet, and Software

The business-use percentage of your cell phone and internet service is deductible, along with software, cloud storage, website hosting, and domain names.

Continuing Education and Memberships

Industry conferences, online courses, trade association dues, professional licenses, and publications related to your current business are all generally deductible.

Equipment: Section 179 and Bonus Depreciation

You don't always have to spread the cost of equipment over several years. Legislation passed in 2025 made two major changes for businesses buying equipment:

Section 179 expensing now allows businesses to deduct up to $2.5 million of qualifying property, adjusted for inflation, with the deduction reduced once total qualifying purchases pass a higher threshold. Section 179 can't create a loss, since the deduction is limited to your business income.

Bonus depreciation returned to 100 percent for qualifying property acquired after January 19, 2025, and there's no business income limit, so it can create or increase a loss.

For smaller purchases, the de minimis safe harbor election lets many businesses expense items costing up to $2,500 each, without tracking them as fixed assets.

Immediate expensing isn't always the best choice. If you expect to be in a higher tax bracket in future years, spreading depreciation out can sometimes save more overall. It's worth running both options.

Recordkeeping Tips That Protect Your Deductions

Keep Business and Personal Money Separate

Use a dedicated business bank account and credit card for business spending only. It makes every deduction easier to identify and far easier to support if the IRS asks questions.

Save Receipts and Note the Purpose

Keep receipts or invoices for every expense, along with a short note on the business purpose where it isn't obvious. For meals, record who attended and what was discussed.

Keep a Mileage Log

Vehicle deductions need a record of the date, destination, business purpose, and miles for each trip. Mileage tracking apps make this almost automatic.

Document Your Home Office

Measure the office and your total home, and take a few photos of the space. If you use the regular method, keep bills for rent or mortgage interest, utilities, and insurance.

Keep Records Long Enough

The general rule is to keep tax records for at least three years from the date you file. For assets and home office depreciation, keep records for as long as you own the asset, plus at least three more years.

Year-End Tax Tips

A tax planning review in October or November, while there's still time to act, is one of the most valuable habits a business owner can build. Review these points before December 31.

Project your profit. Estimate full-year income so you know roughly what bracket you're in and whether it makes sense to accelerate or defer income and expenses.

Time equipment purchases. If you need equipment in the next few months and expect a strong year, buying and placing it in service before year-end can bring the deduction into this year.

Fund or open a retirement plan. Some plans, like a Solo 401(k), need to be established by year-end for certain contributions to count. Others, like a SEP-IRA, can be funded up to the filing deadline.

Pay deductible expenses. For cash-basis businesses, paying bills and stocking up on needed supplies before year-end can pull deductions into the current year. Don't prepay far into the future, since many prepaid expenses must still be deducted over the period they cover.

Review your business structure. If your profit has grown significantly, model whether an S corporation election makes sense for next year, before the March 15 election deadline for calendar-year businesses.

Collect contractor information. Gather W-9s from anyone you've paid during the year so you're ready to issue Forms 1099 in January.

Common Small Business Tax Mistakes

Conclusion

Small business taxes don't reward complexity. They reward consistency. Know the difference between deductible and personal expenses, capture the ones owners most often miss, keep records that stand on their own, and review your numbers before the year ends instead of after. Pair those habits with the bigger decisions, like the right retirement plan and business structure, and your tax bill will reflect how the business actually operates rather than whatever happened to make it into the books.

Frequently Asked Questions