Comparing Investments This calculator compares the net gain of a taxable investment versus a tax-favored one. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Share | Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content Life and Death of a Twenty Dollar Bill How long does a $20 bill last? When Do You Need a Will? When do you need a will? The answer is easy: Right Now. Near 60? Get a Financial Check-Up Even the savviest and most experienced among us need financial planning check-ins.