Mechanics

A deduction reduces taxable income. The dollar value of a deduction is the deduction amount multiplied by your marginal tax rate. A $1,000 deduction at the 22% bracket saves $220 of federal income tax. A $1,000 credit reduces tax dollar-for-dollar — saving $1,000 regardless of bracket.

Refundable vs non-refundable credits

A non-refundable credit can reduce tax to zero but no further. A refundable credit can produce a refund even if it exceeds your tax liability. Earned Income Credit, Additional Child Tax Credit, Premium Tax Credit, and most COVID-era credits are refundable. Most other small-business credits are non-refundable.

Common small-business credits

Work Opportunity Tax Credit (employees from targeted groups). Disabled Access Credit (small businesses making accessibility improvements). Employer Credit for Paid Family and Medical Leave (employer-paid leave under qualifying policies). Small Employer Health Insurance Credit (through marketplace, fewer than 25 FTE employees, average wage below limit). Research Credit (R&E activities — broader than people assume).

Maximizing impact

When choosing between a deduction and a credit (e.g., education spending eligible for either the Lifetime Learning Credit or the tuition and fees deduction), the credit usually wins. Also: Section 41 R&E credit can be elected for prior years up to three years back via amended returns — easy money for businesses doing eligible R&E activities that didn't claim the credit originally.

State equivalents

Many states have their own small-business credits — angel investor credits, hiring credits, R&D credits, manufacturing investment credits. Check your state's offerings; some are stackable with federal.

When to bring in a professional

DIY tax software handles most small-business returns competently, but a handful of situations reliably justify a CPA or enrolled agent: an entity formation or election, a multi-state filing situation, a significant fixed-asset purchase that triggers Section 179 or bonus depreciation modeling, a retirement-plan setup, an IRS notice or examination, and the year of an entity sale. Outside those situations, software plus an annual half-day of personal review produces a defensible return. The cheapest professional engagement is a one-hour consultation rather than a full-service tax-prep relationship.