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Small Business

Small Business Tax Guide

A practical overview of deductions, deadlines, and tax strategy for established small businesses.
8 min read · Updated January 2026

Running a small business means wearing many hats, and taxes are one of the most consequential. A little structure and foresight can save you thousands and a lot of stress.

Know your deductions

The most commonly missed small-business deductions include:

  • Home office, a dedicated workspace can qualify for a proportional deduction.
  • Vehicle and mileage, track business miles or actual expenses.
  • Health insurance, self-employed owners can often deduct premiums.
  • Retirement contributions, SEP-IRA and Solo 401(k) plans offer large deductions.
  • Professional services, software, and subscriptions, ordinary and necessary business costs.

Good record keeping is what turns these from “maybe” into defensible deductions.

Stay on top of deadlines

Missing a filing or payment deadline is an avoidable expense. Pay attention to quarterly estimated taxes and your entity’s annual return date. Payroll tax deposits have their own strict schedule.

Separate business and personal

Open a dedicated business bank account and card. Commingling funds makes bookkeeping harder, weakens your deductions, and can pierce liability protection. Clean separation is the foundation of clean books.

Plan, don’t just file

The businesses that pay the least in tax aren’t lucky, they plan. A quarterly review of your numbers lets you make moves (equipment purchases, retirement contributions, entity elections) while they can still affect this year’s return.

Get the structure right

As you grow, revisit whether your entity still fits. Many profitable small businesses benefit from an S-Corp election to reduce self-employment tax.

Want a partner who plans ahead with you? Explore our business advisory services or book a consultation.

Separate cleanup work from return preparation

List the months with completed reconciliations, accounts that are missing statements, and transactions your bookkeeper could not classify. Then identify the entities, owners, and states involved. This lets the preparer explain what must be resolved before the return can be completed. It also makes fees and responsibilities clearer than treating a year's bookkeeping backlog as an invisible part of filing.

Prepare for business tax work →

General educational information, not an individual tax opinion. The applicable year, jurisdiction, and facts must be reviewed before acting.

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