The business use of websites is widespread. But surprisingly, the IRS hasn’t yet issued formal guidance on when Internet website costs can be deducted. Fortunately, established rules that generally apply to the deductibility of business costs, and IRS guidance that applies to software costs, provide business taxpayers launching a website with some guidance as to the proper treatment of the costs. Hardware or software? Let’s start with the hardware you may need to operate a website. The costs involved fall under the standard rules for depreciable equipment. Specifically, once these assets are up and running, you can deduct 100% of the cost in the first year they’re placed in service (before 2023). This favorable treatment is allowed under the 100% first-year bonus depreciation break. In later years, you can...