Business Deductions

Per Diem Rates from the U.S. General Services Administration

Search by city, state or ZIP code, or by clicking on the map. You can also use the new per diem tool to calculate trip allowances

Rates are set by fiscal year, effective October 1 each year. Find current rates in the continental United States ("CONUS Rates").

Items that Must be Amortized


Tax law designates specific types of capital expenditures that must be amortized over a prescribed number of years. The annual amortization amount is simply the cost of the item divided by the number of years in the amortization period.

The following expenditures must be amortized:
  • Section 197 Intangibles (amortize over 15 years).
    • These are intangible assets acquired in connection with the acquisition of a business.
  • Business start-up costs and organizational costs (amortize over 5 years)
  • Construction period interest and taxes
  • Research and experimentation costs
  • Bond premiums
  • Reforestation costs
  • Pollution control facilities
  • Costs of acquiring a lease

Avoid costly penalties!

Use the IRS Online Tax Calendar
to check filing and deposit deadlines.