The Internal Revenue Service has applied 2009 tax-year inflation adjustments to dollar limitations for 401(k) plan contributions and other items.

The adjustments are required by Section 415 of the Internal Revenue Code, which requires the IRS to increase many minimums, maximums and other figures to reflect increases in the cost of living.

The limit of the annual benefit under a defined contribution plan, for example, will increase to $49,000, from $46,000, and the annual benefit limit for defined benefit plans will increase to $195,000, from $185,000.

The limitation used in the definition of highly compensated employees has increased to $110,000, from $105,000.

A copy of IRS Revenue Notice 2008-102, the notice that lists the inflation adjustments, is available here.