What are tax write-offs for small businesses?

Tax write-offs are legitimate business expenses that may be deductible when they meet IRS rules for ordinary and necessary costs. Common areas include home office, vehicles, software, equipment, marketing, and industry-specific operating expenses.

How do I know if a business expense is a valid tax write-off?

Start with business purpose: the expense should be ordinary and necessary for your trade or business, and you should be able to document it (receipts, mileage/use logs, and the business reason).

What documentation should I keep for deductions?

Keep receipts/invoices, records showing business use, and any required support for the specific deduction (for example mileage logs for vehicle-related expenses). Strong, consistent documentation helps with audit readiness.

What business types does Biz WriteOffs cover?

Biz WriteOffs covers 28 industries including freelancers, creators, e-commerce, contractors, real estate, restaurants, healthcare, and logistics fleets. Each vertical has dedicated write-off categories and purchasable item examples.

Is tax advice involved when using Biz WriteOffs?

Biz WriteOffs is an educational and workflow tool for organizing and learning about possible deductions. You should review your situation with a qualified tax professional before filing.

Write-Off CatalogMedical Equipment & Supplies

Spirometer Diagnostic

$707-$2828

Spirometer Diagnostic — Medical Equipment & Supplies for medical and dental practices

Spirometer Diagnostic

Spirometer Diagnostic

Business justification

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