Before you sell residential property, consider the potential benefits of becoming a landlord.

Thinking about selling that extra piece of residential real property? Think again. There may be more value to holding onto the property and renting it out than you realize. It's worth evaluating such potential benefits as rental income, tax deductions, property appreciation, and being your own boss -- before you put out the "For Sale" sign.

Rental Income Cash Flow

Ideally, you want a rental to produce a positive annual cash flow. To figure out whether this is possible, start by determining how much your property would rent for. Check local listings for properties of a similar size and quality to yours, ideally within the neighborhood where your property lies. You may need to call some landlords or visit rentals for details.

But don't count on receiving rental income for 12 months out of the year. Even if your property is in high demand, transition time between tenants can take a month or two. Nationwide, the vacancy rate runs around 10%, but this varies widely between urban and rural rentals, and between different regions of the country. It can even vary by type of house. For example, a luxury home may be hard to rent because potential tenants who can afford the monthly payments are likely to be focused on buying a house of their own. Your local reference librarian or real estate broker should be able to help you research your area's vacancy rates.

Also understand that your rental income will not be pure profit. You'll need to subtract your projected property taxes, mortgage payments (if the house isn't yet paid off), insurance, utilities, repair and maintenance costs, and if you don't wish to spend your own time dealing with tenants, property management fees (approximately 8% to 10% of the rental income). Maintenance costs can be particularly high if your house is old or you've put off major repairs such as replacing the roof or furnace. As a landlord, you'll be responsible for keeping the property in habitable condition.

As you see, you'll need to do a little research and a little math. Once you've calculated your annual projected rent minus any expected vacancies, then subtracted all your likely expenses, you'll arrive at your annual profit. If it looks like you'll come out $1,200 to $2,400 ahead each year ($100 to $200 each month), you're doing well by industry standards. If you'll only be breaking even, or will lose money by renting, the only reason to keep the property would be if you're likely to earn high profits by waiting to sell.

Tax Deductions

The tax code is full of deductions for landlords. In fact, some landlords can claim so many deductions that it more than offsets all their rental income, resulting in what's known as a "net loss." This is especially common among landlords who don't own many properties -- particularly in their first year or two, when they tend to charge lower rents. Ending up with a net loss from your rental activities isn't a bad thing, though. Subject to certain restrictions known as the passive loss and at-risk rules, you may be able to deduct this loss from any nonrental income you have, such as a salary.

Here are some of the more significant tax deductions available to small residential landlords.

• Interest. Often a landlord's biggest deduction, this includes mortgage interest payments on loans to buy or improve rental property. It also includes interest on credit cards for goods or services related to the rental activity.
• Depreciation. You can deduct the actual cost (purchase price) of rental property over a number of years (27.5 years for residential rentals).
• Repairs. The cost of repairs to rental property (repainting, fixing leaks, plastering, fixing broken windows) are fully deductible in the year in which you pay for them.
• Local and long distance travel. Landlords can deduct travel expenses related to their rental activity. The IRS scrutinizes these deductions, however, so learn the rules and keep good records.
• Home office. Landlords can deduct their home office expenses, provided they meet certain requirements.

For many more deductions you'll be able to take as landlord, see Every Landlord's Tax Deduction Guide, by attorney Steven Fishman (Nolo).

Property Appreciation in Value

Property values have been on an upward trend for the last several decades. Although the gains have recently slowed, and nothing is guaranteed, U.S. population pressures suggest that the long-term trend will continue upward. To get a rough idea of how much your property has already appreciated since you bought it, check out free websites such as http://www.domania.com and http://www.homegain.com. The longer you wait, the more the property is likely to be worth.