Knowing your tipping point when it comes to your tax brackets may save (earn) you a bunch of money and tell you if you should be investing more of a percentage of your income. What I mean is this, if you are on the border of being in a higher tax bracket, investing more money into your 401k or IRA or whatever plan you use, could actually put you in that lower tax bracket, saving you a bunch of money in taxes while increasing your investments - that make you money.
Let’s make an example; We’ll put a pal of mine in the spotlight whom we’ll call John. John is a single guy who makes $90,000 a year, and he invests 6% of his pay pre-tax into his 401k plan. His net taxable income would be (assuming he has no other deductions for simplicity that would lower his taxable income) $90,000 - $5,400 (90,000 X .06 = 5,400), or $84,600. In the tax tables below, you would see John falls into the 28% tax bracket, as his income is between $78,850 but not over $164,550. John would pay $16,056.25 plus 28% of the excess over $78,850, in this case that would be $94,000-$84,600 = $9,400 X .28 or $2,632. So, he would pay $16,056.25 + $2,632 = $18,688.25 in taxes for a net take home pay of $94,000-$18,688.25= $75,311.75.
What if John would have put aside 12.5%? $90,000 - $11,250 (90,000 X .125 = 11,250), or $78,750. In the tax tables below, you would see John now falls into the 25% tax bracket, as his income is over $32,550 but not over $78,850. John would pay $4,481.25 plus 25% of the excess over 32,550, in this case that would be $78,750-$32,550 = $46,200 X .25 or $11,550. So, he would pay $4,481.25 + $11,550 = $16,031.25 in taxes for a net take home pay of $78,750-$16,031.25 = $62,781.75.
By investing a little more than double what he was previously, John dropped himself a tax bracket and avoided $2,657 in taxes ($18,688.25 - $16,031.25 = $2,657). Not to mention, his investments went from $5,400 to $11,250. If his company matched that money, instead of having $10,800, he would have $22,500 invested and working for him. If he was 30, and left that alone til he was 60, he would have made over $393,000 (assuming company match of 100%, investment total of 22,500), compared to a little over $188,000 if all he had invested was $10,800 (this number is based off of 5,400 and a 100% company match, investment total 10,800).