Small Business Tax Deductions: The Complete List (With % and Caps)
Employees earn, get taxed, then spend what's left. Business owners earn, spend on legitimate business expenses, then get taxed on what's left. Same tax code, available to everyone — most people were just never shown how it works.
Here's the math that makes this worth your next twenty minutes: $20,000 in legitimate deductions at a 22% bracket keeps roughly $4,400 in your pocket — not once, but every year your business runs. For most entrepreneurs, $10K–$35K in combined deductions is realistic once you know what to track. Below is the list, with the percentage deductible and the caps that matter.
The deduction list
| Deduction | % deductible | Cap / rule to know |
|---|---|---|
| Home office | 100% of the calc | Simplified method: $5/sq ft up to 300 sq ft ($1,500 max). Regular method: business-use % of actual home costs, no set cap. Space must be used regularly and exclusively for business. |
| Vehicle & mileage | 100% of business miles | IRS standard mileage rate per business mile. Commuting never counts. Keep a mileage log — no log, no deduction. |
| Phone & internet | Business-use % only | Estimate honestly and consistently (e.g., 60% business use = 60% of the bill). |
| Software & AI tools | 100% | Storefront, email platform, AI subscriptions, design tools — no set cap when used for business. |
| Business travel | 100% | Flights, lodging, ground transport when the trip is primarily business. |
| Business meals | Generally 50% | Meals with clients, vendors, or partners while discussing business. Save the receipt, note who and why. |
| Education | 100% | Courses, books, coaching that improve skills in your current business (not to qualify for a new profession). |
| Marketing & ads | 100% | Website, ads, branding, content creation — no set cap. |
| Business insurance | 100% | Premiums for business liability and similar policies. |
| Startup costs | Up to $5,000 in year one | Phases out dollar-for-dollar above $50K total startup costs; the remainder amortizes over 15 years. |
The rule that makes all of this real
A deduction you can't document is a deduction you lose. Three habits cover you:
- Separate accounts. Every business dollar flows through a business bank account and card. Your bank statement becomes a near-complete expense record.
- Capture receipts the day they happen. A photo in a dedicated folder is enough. Digital copies are accepted.
- Log the "why" for gray-area items. Meals and travel need the business purpose noted — one line is plenty.
Why this requires a real business
These deductions belong to businesses — not hobbies. That means registering a real entity, getting your free EIN from the IRS (ten minutes at irs.gov), and running the money separately. That structure is also what unlocks business credit under your EIN — the second half of the rulebook most people never learn.
Get the cheat sheet version free. The Wealth Starter Kit includes this deduction list as a printable cheat sheet, the Business Quick Start Checklist, 10 modern business ideas under $250, the AI Money Funnel Playbook, and the 7-Day Wealth Sprint. $266 of tools, free.
Get the Free Starter Kit →FAQ
Do I need an LLC to take these deductions?
Business deductions attach to genuine business activity — sole proprietors can take them too. An entity like an LLC adds liability protection and structure, and makes the separation (banking, credit, records) much cleaner.
Can I deduct expenses from before my business officially started?
That's the startup-cost deduction: up to $5,000 of qualifying pre-launch costs in year one, with the remainder amortized. Keep those early receipts.
What if I use something for both personal and business?
Deduct the business-use percentage — the honest split, applied consistently. Phone, internet, vehicle, and home office all work this way.
When do quarterly estimated taxes start?
Generally once you expect to owe $1,000+ in tax for the year from business income. Set aside a percentage of every payment you receive so the quarterly bill is never a surprise.
Educational purposes only — not legal, tax, or financial advice. Rates, caps, and rules change; confirm current-year specifics with your tax professional.