Man, I can only contribute a max of ~$9k per year into my 401K because of some weird compensation rule. If i put in more, i'll get a refund at the end of the year.
Here's what is says according to wikipedia. Any understand this?
Highly Compensated Employees (HCE)
To help ensure that companies extend their 401(k) plans to low-paid employees, an IRS rule limits the maximum deferral by the company's "highly compensated" employees, based on the average deferral by the company's non-highly compensated employees. If the rank and file saves more for retirement, then the executives are allowed to save more for retirement. This provision is enforced via "non-discrimination testing". Non-discrimination testing takes the deferral rates of "highly compensated employees" (HCEs) and compares them to non-highly compensated employees (NHCEs). An HCE is defined as an employee with compensation of $100,000 or greater in 2006 and remains unchanged for 2007. However, as an option prior year compensation can be used in this testing, and often is. That is for plans whose first day of the plan year is in calendar year 2007, we look to each employee's prior year gross compensation (also known as 'Medicare wages') and those who earned more than $100,000 are HCEs. Most testing done now in early 2006 will be for the 2005 plan year when we compare employees' 2004 plan year gross compensation to the $90,000 threshold for 2004 to determine who is a HCE and who is a NHCE.
The average deferral percentage (ADP) of all HCEs, as a group, can be no more than 2% greater (or 150% of, whichever is less) than the NHCEs, as a group. This is known as the ADP test. When a plan fails the ADP test, it essentially has two options to come into compliance. It can have a return of excess done to the HCEs to bring their ADP to a lower, passing, level. Or it can process a "qualified non-elective contribution" (QNEC) to some or all of the NHCEs to raise their ADP to a passing level. The return of excess requires the plan to send a taxable distribution to the HCEs (or reclassify regular contributions as catch-up contributions subject to the annual catch-up limit for those HCEs over 50) by March 15th of the year following the failed test. A QNEC must be an immediately vested contribution.
The annual contribution percentage (ACP) test is similarly performed but also includes employer matching and employee after-tax contributions. ACPs do not use the simple 2% threshold, and include other provisions which can allow the plan to "shift" excess passing rates from the ADP over to the ACP. A failed ACP test is likewise addressed through return of excess, or a QNEC or qualified match (QMAC).
There are a number of "safe harbor" provisions that can allow a company to be exempted from the ADP test. This includes making a "safe harbor" employer contribution to employees accounts. Safe harbor contributions can take the form of a match (generally totalling 4% of pay) or a non-elective profit sharing (totalling 3% of pay). Safe harbor 401(k) contributions must be 100% vested at all times with immediate eligibility for employees. There are other administrative requirements within the safe harbor, such as requiring the employer to notify all eligible employees of the opportunity to participate in the plan, and restricting the employer from suspending participants for any reason other than due to a hardship withdrawal.