Typically, if property for business has a useful life of more than one year, the cost must be spread across several tax years as depreciation with a portion of the cost deducted each year.

But there is a way to immediately receive these income tax benefits in one tax year. The provisions of Internal Revenue Code Section 179 allow a sole proprietor, partnership or corporation to fully expense tangible property in the year it is purchased.

Changes first made in 2003 and then extended in 2006, mean that businesses can write off more of their capital expenditures through 2009. These changes mean that in 2006, a business can expense $108,000 in capital expenditures up to an overall investment limit of $430,000.

Property that may be written off in the tax year of purchase, rather than depreciated over the asset's useful life, includes:

- Machinery and equipment
- Furniture and fixtures
- Most storage facilities
- Single-purpose agricultural or horticultural structures

Also, the definition of eligible section 179 property was expanded by the 2003 legislative changes to include off-the-shelf computer software. Previously, it had to be written off over three years.

The Section 179 election is made on an item-by-item basis for eligible property. The election must be made in the tax year the property is first placed in service.

You have now determined the maximum deduction based on the amount of property purchased during the year. You now must pass the aggregate income hurdle.

Your deduction is limited to your aggregate taxable income from the active conduct of any trade or business. Active trade or business includes employee and spouse's wages, sole proprietorships, partnerships and S corporations. Basically, this means that unless you have other sources of business income, your Section 179 deduction can't create a taxable loss for your business.

More business owners are able to take advantage of the deduction when they combine their company earnings with those of a spouse or money earned in addition to (or before starting) their own company income.

For example, you are someone else's employee for most of the year. Your wages exceed the Section 179 deduction. You start your own business at the end of the year and purchase equipment and furniture. Even if your new business doesn't generate gross income that year, you can still take the Section 179 deduction on the new equipment and furniture. Why? Your wages exceed the Section 179 deduction.

Any amounts disallowed by the trade or business taxable income limit are carried over to the next year and added to the cost of any eligible property placed in service in that year. The same rules for maximum deduction, maximum annual investment and taxable income apply to the next tax year as well.

The tax tip explains the process for using Section 179 to fully expense certain business expenses immediately instead of depreciating them across a period of several years. You should also be aware of less obvious advantages of the Section 179 deduction:

- Lowers adjusted gross income, which could help you qualify for various deductions which are limited by AGI.
- Lowers earned income, which can increase your earned income credit.
- Is allowed in full even if the eligible property is placed in service on the last day of the year.

This tip also includes examples that demonstrate the three limits: the maximum dollar limit, the investment limit, and the taxable income limit. By including employment and spousal wages, many taxpayers find they are able to take advantage of this provision.

Are you interested in more information? Refer to Chapter Two of IRS Publication 946: How To Depreciate Property.