Why do people always ask this question? It boils down to 'Should I let my company give me free money?' There is exactly one argument against it, which is 'I need to put a percentage in too and I have bills to pay' That are gument is simple to argue against. Watch, lets add some math.
Most 401K's match some percentage to 5%. your 12% match is pretty good, which works out to 6% at 100% match for math. But lets look at a 5% match at 50% as that is more popular. Then lets look at someone who makes 25,000 a year as that is probably close to someone just starting out and going on the argument that 'I have no money' Lets further assume that your takehome pay is 70% of your gross rate. (30% for tax, medical, and such) which is also typical.
gross pay: 25,000
net pay without 401k: 25,000 * 0.70 = $17,500
biWeekly without 401k: 17500 / 26 = $673.00
Now, lets put in the max company match of 5%
Total going into 401k: 25000 * 0.05 = $1250
Gross pay: 25000 - 1250 = $23750
Net pay with 401k: 23750 * .70 = $16,625
biweekly with 401K: 16,625 / 26 = $639
Total amount in your 401k: 1250 * 1.5 (50% match) = $1875
Total amount your takehome pay was reduced: (673 - 639) = $34 biweekly * 26 = $884 yearly
amount of free money: 1875 - 884 = $991
There is no way you are going to notice $34 less on your check. even without a company matach,this is still awesome, because your takehome pay was $884 less, but you would have $1250 in your 401k. Hello! Free money!
Then, lets say you kept earning 25,000 a year until you retire, and kept putting 5% into your 401k, and your company kept matching at 50% of it. What would you have when you retire?
Amount you put in yearly: $1250
With Employer match: $1875
Yearly average of an investment: 10% (historical market average)
Start at 20 years old
retire at 65 years old
total years putting money into your 401k: 65-20 = 45
total you put into your 401k: 1875 * 45 = $84375
Total when you retire: $957,852
Yea, that's a lot of free money. So for $34 every paycheck you can have just under a million when you retire. So, tell me, is buying 1 less DVD and CD a week worth it?