Many people dream of turning a hobby into a regular business. Perhaps you enjoy boating and would like to open a charter fishing business. Or maybe you’d like to turn your sewing or photography skills into an income-producing business. You probably won’t have any tax headaches if your new business is profitable over a certain period of time. But what if the new enterprise consistently generates losses (your deductions exceed income) and you claim them on your tax return? You can generally deduct losses for expenses incurred in a bona fide business. However, the IRS may step in and say the venture is a hobby — an activity not engaged in for profit — rather than a business. Then you’ll be unable to deduct losses. By contrast, if...

Like many people, you may have dreamed of turning a hobby into a regular business. You won’t have any tax headaches if your new business is profitable. But what if the new enterprise consistently generates losses (your deductions exceed income) and you claim them on your tax return? You can generally deduct losses for expenses incurred in a bona fide business. However, the IRS may step in and say the venture is a hobby — an activity not engaged in for profit — rather than a business. Then you’ll be unable to deduct losses. By contrast, if the new enterprise isn’t affected by the hobby loss rules because it’s profitable, all otherwise allowable expenses are deductible on Schedule C, even if they exceed income from the...