The reason I calculate to reach $17,500 at the end of the year is to maximize my employers match. My company matches my contributions dollar for dollar on the first 3 percent. They match 50 cents on the dollar for the next 3 percent. That is 4.5 percent free money. If I hit the $17,500 mark early I miss out on the free money since they only match if I am contributing, and once you hit the limit they stop pulling money from your paycheck.
Let's say you make 100,000 per year. They match dollar for dollar on the first 3%. That's $3000 you contribute, $3000 they contribute.
Then they match 50 cent on the next 3%. You put in $3000, they put in $1500.
You've put in $6,000, you are still able to put in $11,500 more. They hit their cap of $4500. So it doesn't matter when you hit $17,500, you will always get your full company match. The $17,500 is YOUR max, not including theirs.
http://www.bankrate.com/finance/retirement/employer-match-counts-toward-401k-limit.aspxThe limiting factor is typically if an employer caps what you can have taken out of each check. If there is no limit on what you can withhold, you can max sooner. I have my wife's set at 75% deduction per check and they have a 4% match of her salary. She doesn't make a lot so in November, we ultimately see a full take home paycheck finally :)
And also understand, once the limits on either your 401K deductions or the companies percentage match is reached, the payroll deduction will automatically stop. There is no way you can go over unless you work for a mom and pop shop that does their accounting on napkins :)
Isn't the percentage match based on your total annual salary? So if you are only contributing 4.5% of your salary, they will match 4.5% of your salary. So if you make $52K, the most they will match is $2340 regardless. Are some of you saying if you had a payroll deduction of 100% of your first 10 paychecks of the year, they wouldn't match the 4.5% of your salary?? That is the point, if you did in fact do 10 straight checks of $52K annually, you would be at 10,000 contributed to your 401K and they would have already hit their 4.5% match of $2340 at week 3. This is still a long way before you ever hit your max of $17,500.
I find it difficult to believe this isn't the case. Reason being, if a CEO made $400K per year and the company match was 4.5%, the CEO would hit the limit on his 3rd or 4th check with a 10-15% payroll deduction and the company would have already hit the matched limit @ $18,000 (4.5% of $400,000).