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The 10 Most-Missed Deductions for Service Businesses

Service businesses often leave legitimate tax savings on the table. Here are ten deductions owners overlook—and how to document them.

Wednesday, Nov. 25 | 2 min read


Why this matters

Margins in service firms are won or lost in the details. The right documentation turns everyday spending into compliant deductions.

1) Professional development & certifications

Courses, conferences, licensing renewal fees, exam costs, and required CEs related to your trade.

What to keep: Invoices, agendas/syllabi, proof of business relevance.

2) Software & cloud subscriptions

Project management, CRM, design tools, accounting, password managers, data backup.

Tip: Pay annually where appropriate and track per-seat costs.

3) Marketing & reputation management

Website hosting, ads, SEO services, directory listings, design/printing, review platforms.

4) Home office (regular & exclusive use)

A dedicated space for admin/management qualifies. Track square footage, utilities, and related expenses.

5) Business mileage & travel

Client visits, supply runs, conferences. Keep a contemporaneous log (date, purpose, start/stop odometer or credible map log).

6) Phone & internet

Business lines and the business-use portion of mixed-use plans.

7) Small tools & supplies

De minimis items (keyboards, microphones, lighting, test devices). Follow your capitalization policy.

8) Bank, payment processor & merchant fees

Stripe/PayPal/Square fees add up—don’t net them away from income.

9) Health insurance premiums (entity-specific)

Owners may be eligible to deduct premiums; treatment varies by structure—flag for your CPA.

10) Bad debts (accrual-basis)

Document attempts to collect and write off uncollectible receivables under a consistent policy.

Documentation checklist

  • Receipts/invoices with vendor, date, description

  • Purpose notes (who/what/why)

  • Contracts/subscription confirmations

  • Logs (mileage, mixed-use allocations)

How KKA can help

We’ll review your chart of accounts, identify missed categories, and implement a documentation workflow that stands up to scrutiny.

Disclaimer: General information only; not tax advice. Discuss your facts with a professional.