IRA calculator

The calculator determines your timeline by finding your contribution years, which is the difference between your retirement age and your current age. For Traditional IRAs, your annual contribution is invested pre-tax. The compound growth formula is calculated as: Ira Balance = Annual Contribution × [((1 + Return Rate)^Contribution Years - 1) / Return Rate] × (1 + Return Rate). For Roth IRAs, your contributions are first adjusted for your current tax bracket using the formula: Annual Contribution After Tax = Annual Contribution - (Annual Contribution × Contribution Tax Bracket). This after-tax figure is then compounded over your working years using the same growth mechanics. Finally, annual withdrawals in retirement and their corresponding tax liabilities are modeled using standard capital recovery annuity equations to give you a clear picture of your annual take-home cash flow.

Imagine you are 30 years old and plan to retire at age 65, giving you 35 contribution years. You decide to contribute $6,000 annually into your IRA account, and you anticipate an average annual return rate of 7% (0.07). If you are in a 22% contribution tax bracket, your annual contribution after tax for a Roth account would be $4,680. Over 35 years, your Traditional IRA balance compounds to approximately $839,150 before retirement taxes. Meanwhile, your Roth IRA balance, built from after-tax contributions, grows to roughly $654,537. During a 20-year retirement withdrawal phase, the Traditional IRA generates a gross annual withdrawal of about $79,150. After applying a 15% retirement tax bracket, your net annual take-home from the Traditional IRA comes to roughly $67,277, whereas the Roth IRA distributions remain entirely tax-free.

Maximize your employer match first if available, as it offers an immediate 100% return before you even fund your personal IRA. Consider your current tax bracket versus your expected bracket in retirement: if you expect to be in a higher tax bracket later, a Roth IRA is often more advantageous since you pay taxes now rather than later. Finally, start contributing as early as possible to let the power of compounding maximize your long-term wealth accumulation.