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Taxes in Your First Year of Business

The first year sets the tax structure for the next decade. Entity choice, accounting method, and retirement plan all start here.

Katie Gorles
Written by
Katie Gorles
Updated April 22, 2026

First-year decisions

These affect years of returns, not just the first:

  • Entity type (Schedule C, LLC, S-corp, C-corp)
  • Accounting method (cash or accrual)
  • Fiscal year (calendar or specific fiscal year-end)
  • Startup cost deduction vs. amortization
  • Quarterly estimated payment schedule
  • Retirement plan (Solo 401(k), SEP, SIMPLE, Defined Benefit)
  • Health insurance deduction strategy

Startup cost deduction

Up to $5,000 of startup costs are deductible in year one; the rest amortized over 15 years. Organizational costs (attorney fees for LLC formation, corporate filing fees) get the same treatment.

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Common questions

When should I form an S-corp?
Typically once net income consistently exceeds $45,000. Form too early and payroll costs exceed savings.

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