Maximizing Tax Deductions: 15 Often-Missed Write-Offs for Startups

Many S-corp founders overpay payroll taxes by setting salaries higher than required -- or underpay and trigger audit risk.

An accountable plan allows owners to reimburse themselves for business expenses tax-free, rather than deducting them personally.

The home office deduction is legitimate when used exclusively and regularly -- but often misapplied or avoided entirely.

Many ecommerce founders deduct inventory purchases -- but miss the associated carrying costs.

Payment processors deduct fees before payouts, causing founders to under-deduct expenses or misstate revenue.

Startups can deduct or amortize up to $5,000 in startup costs and $5,000 in organizational costs.

Sales tax paid on expenses (not collected from customers) is often deductible -- but frequently miscategorized.

Legal, accounting, and advisory fees are deductible -- but many ecommerce founders miss less obvious items.

Many founders under-deduct SaaS tools because usage spans personal and business purposes.

Courses, conferences, and training are deductible when they maintain or improve existing business skills.

Founders deduct airfare and lodging -- but miss associated travel expenses.

State-level business taxes are deductible at the federal level but often misclassified.

Depreciation isn't just about what you deduct -- it's about when.

Ecommerce companies often qualify for R&D credits that they never claim.

S-corp owners can deduct health insurance premiums -- but only if handled correctly through payroll and reporting.