401k limitations are:
Catch up limitation
Before taxes impost limitations
Indemnity Limitations – the 401k have no indemnity limitations. If your employer proposes you a 401k plan, then you are able to join not thinking about the amount of money you normally earn. If the 401k limitations do not influence your indemnity, the Roth IRA plan features indemnity limitations as for individuals as well as for couples. The employees whose earnings are higher than 100 thousand dollar in 2007 are regarded “highly indemnified”
The IRS has established limitations related to the amount that you can put in your company’s plan account within one year. Besides, the IRS has also the final one, related to the largest amount that can be put into a plan before taxes. All of those rules and limitations set by the IRS are developed for the employer making no distinction and not supporting its employees via a 401k plan. Moreover, some of the plans need to pass a non-distinction test every year, but that differs from plan to plan.
Impost limitations and before taxes limitation–these limitations are applied to both the employer an employee, as well as imposts before taxes versus overall imposts. The pre-tax imposts have the possibility differ from year to year. For example, for 2007 the maximum impost was 15,500 dollar. Such limitation was established by the IRS, though any 401k plan can have its own maximum. The overall impost refers to all the imposts including the profit-sharing imposts, any employer matching impost as well as any imposts made after taxes. The limitation given by the IRS for the 2007 year is 100 percent of the indemnity or 45 thousand dollar, whichever is smaller. Based on one employer to another employer their matching impost limitation may vary. But it cannot exceed 6% of your indemnity before tax. No matching impost is included in the impost limitations.
Catch up limitations – this kind of limitations deals with persons who have not less than 50 years before the year ends. If you belong to this category you should understand that you qualify to make an extra impost. For example, for 2007 such extra impost was 5 thousand dollar. You need to check with your company’s benefits department to figure out if you are entitled to such an impost. You should remember that having more than 1 plan, the 401k limitations affect the overall of all your defrayments to deferred indemnity retirement plans.
Resource - http://new401kcontributionlimits.com/
Blog about 401k contribution limits - http://new401kcontributionlimits.com