Can I write off my website redesign if I use affiliate links?

Generally, yes — a website redesign can often be deductible if the site is part of a real business, including affiliate marketing. Affiliate links can be one fact that supports a profit motive, but they do not by themselves prove the site is a business; the IRS looks at the overall facts, such as whether you operate in a businesslike way, keep records, market the site, and try to earn a profit.

How the deduction is treated depends on timing and the nature of the work:

• If the site is already an active business, routine website maintenance, small design updates, and ordinary content work are often currently deductible as ordinary and necessary business expenses.
• If the site is not yet active, pre-launch costs may fall under startup-cost rules, which can allow only limited first-year deductions and may require the rest to be amortized.
• If the redesign creates or improves a long-term asset — for example, a major rebuild or proprietary software development — some or all of the cost may need to be capitalized and recovered over time rather than deducted immediately.

Because the tax treatment can turn on specific facts, it is a good idea to confirm the latest IRS rules and, if the project is significant, ask a CPA or tax professional whether your redesign is currently deductible, must be capitalized, or is a startup cost.