Many people are surprised to learn that some "luxury" items can be deductible business expenses. Of course, moderation is key. Excessive spending is sure to attract the IRS's attention. As some recent high-profile court cases have shown, the government isn't timid in its crackdown on business owners using company funds for personal travel and entertainment.

First class travel

The IRS doesn't require that your business travel be the cheapest mode of transportation. If it did, businesspeople would be traveling across the country by bus instead of by plane. However, the expense as it is relative to the business purpose must be reasonable. Taking the Queen Mary II across the Atlantic to a business meeting in the U.K. could raise a red flag at the IRS.

As long as your business is turning a profit and is operated legitimately as a business and not a hobby, traveling first class generally is permissible. Even though a coach airline seat will get you to your business appointment just as quickly and an inexpensive hotel room is a place to sleep,  the IRS generally won't try to reduce your deduction.

However, if your trip lacks a business purpose, the IRS will deny your travel-related deductions. Don't try to disguise a family vacation as a business trip. Many people are tempted; it's not worth the consequences, especially in today's environment where the IRS is aggressively looking for business abuses.

Conventions

Convention expenses are deductible if a sufficient relationship exists to your profession or business and the convention is in North America. No deduction is allowed for attending conventions or seminars about managing your personal investments.

Overseas conventions definitely get the IRS's attention. If you want to deduct the costs of attending a foreign convention, you have to show that the convention is directly related to your business and it is as reasonable to hold the convention outside North America as within North America.

Country clubs expenses

Country club dues are not deductible. In fact, no part of your dues for clubs organized for business, pleasure, recreation, or social purposes is deductible.

Some country club costs may be partially deductible if you can show a direct business purpose and you meet some tough written substantiation requirements. These include greens fees as well as food and beverage expenses. They may be deductible up to 50 percent.

Meals and entertainment

Younger colleagues don't remember when business meals were 100 percent deductible and deals were brokered at "three martini lunches." Meals haven't been 100 percent deductible for a long time and, like other entertainment expenses, the IRS combs them carefully for abuses.

Expenditures for meals, entertainment, amusement, and recreation are not deductible unless they are directly related to, or associated with, the active conduct of your business. The IRS also requires you to keep a written or electronic log, made at the time you make the expenditure, recording the time, place, amount and business purpose of each expense.

Even if you pass the two tests, only 50 percent of meal and entertainment expenses are deductible.  If you write-off business meals through your company and there is a proper reimbursement arrangement in place, you won't be charged with any imputed income for the half that is not deductible, but your company will be limited to a 50 percent write-off.