401K contributions for employees are limited to $18,000/year if you are under 50 years old. If older than 50 you may contribute up to $24,000/year.
Most companies I have experience with provide a match on the first x% of pay. For example, a 50% match of the first 6% of pay. Under that method you would have to ensure that contributions were spaced out during the year to get the full benefit of the match., If your company will match 7% immediately then you should make the total 401K contribution as early in the year as possible to take advantage of extra compounding of gains for the year.
Edit:
I saw your other thread and realized you may be including potential after tax contributions. Some plans allow for that, and in that case your employee match and your total contributions can't exceed $53,000.
After tax contributions to a 401K are generally a good thing since they can be rolled into a Roth IRA.