# Affiliate Marketing Tax Regulations in 2026

Canonical: https://trykintsugi.com/blog/navigating-affiliate-marketing-sales-tax-regulations-in-2026
Published: 2023-10-02

Affiliate marketing creates sales tax duties for marketers and brands. How economic nexus, marketplace facilitator laws, and affiliate nexus apply in 2026.

Affiliate income is taxable income. As self-employed individuals, affiliate marketers are responsible for reporting commissions and bonuses, paying federal and state income tax, and covering self-employment tax. Here's what that looks like in practice.

## The 2026 Nexus Landscape

Since the 2018 South Dakota v. Wayfair ruling, economic nexus has been the primary trigger for sales tax obligations. Most states with a sales tax now require remote sellers to register and collect once they cross a sales threshold (commonly $100,000 in annual sales), regardless of physical presence. For affiliate marketers, this matters mainly because it means the brands you promote are very likely already collecting sales tax in most states based on their own volume, independent of anything you do.

Marketplace facilitator laws add another layer: platforms like Amazon and Shopify's marketplace typically handle sales tax collection on behalf of third-party sellers, which reduces the compliance burden further downstream.

Affiliate nexus (also called click-through nexus) still exists in some states, including New York and California. It applies when an affiliate's in-state promotional activity creates a tax obligation for the brand. But since economic nexus now captures most sellers on its own, affiliate nexus mainly matters for smaller brands that haven't yet crossed a state's economic threshold but have affiliates actively driving sales there. Affiliates themselves generally aren't responsible for collecting sales tax, but it's worth knowing your activity can still factor into a brand's obligations.

## Taxes Affiliate Marketers Owe

Income tax: Commissions and bonuses are reportable income. If you earn more than $400 a year from affiliate activity, the IRS requires you to file, typically via Schedule C on Form 1040.

Self-employment tax: Since no employer withholds on your behalf, you're responsible for the 15.3% self-employment tax covering Social Security and Medicare.

State and local taxes: Vary by where you live; some states layer on additional income tax obligations.

## Forms to Know

1099-NEC: Issued if you earn $600 or more from a single affiliate program.

Schedule C: Reports affiliate income and deductible expenses.

Form 1040-ES: For quarterly estimated payments, required if you expect to owe $1,000 or more for the year.

## Common Deductions

Affiliate marketers operating as sole proprietors can typically deduct: home office costs, website and hosting fees, advertising spend, software and analytics subscriptions, business travel, professional services (accountants, tax advisors), office equipment, a business-use portion of internet and phone bills, and relevant training or courses. Good record-keeping is what makes these deductions defensible if you're ever asked to substantiate them.

## Staying Compliant in 2026

Track everything. Log every commission, bonus, and business expense as it happens.

Set money aside. A common rule of thumb is 25-30% of income, to cover federal, state, and self-employment tax.

Pay quarterly. Use Form 1040-ES to avoid underpayment penalties.

Know your brands' nexus status. Most are already collecting sales tax; ask if you're unsure, and stay aware that your activity could still matter for smaller partners in affiliate-nexus states.

Talk to a tax professional if your earnings span multiple states or get complex.

### How Kintsugi Fits In

Kintsugi is built for the brands and e-commerce businesses affiliates promote, not for the affiliate's own income tax filing. For businesses managing sales tax across states, [integrations with platforms like Shopify, BigCommerce, and Chargebee](/product/integrations) mean nexus tracking, calculation, and reporting run automatically instead of requiring manual monitoring.Book a demo now.