You probably know this, but it is possible to set things up so that zero taxes are taken out of your paycheck. Now, come April 15th, you will owe those taxes, b

You probably know this, but it is possible to set things up so that zero taxes are taken out of your paycheck. Now, come April 15th, you will owe those taxes, but if you have an idea or know what that amount will be (in theory, you should be able to know it exactly), then... ...you can elect to not take those taxes out, and instead via your bank or employer have that percentage of your check put into a savings account of some sort. Then you can let that money sit and accrue interest (and laugh at the small return), or use it to invest (which has a greater risk, because if you invest wrong, now you've lost that money and you still need to pay it back at the end of the tax year). If this sounds interesting to you, then (unless you already have the experience) I would look into some form of small time investing, or other financial instruments for wealth accumulation from which you can still withdraw an amount at the time you need to pay your taxes. Assuming you can find something with a decent return over a year's period. Which is probably the most difficult part of it all.