Individual Retirement Account (IRA) Calculator

In the United States, saving for retirement requires utilizing government-approved tax shields to protect your investments from annual tax drag. Regulated by IRS Publication 590, the **Individual Retirement Account (IRA)** is a cornerstone of personal wealth building. However, choosing the right IRA requires comparing multiple account types—including Traditional, Roth, SEP, and SIMPLE IRAs—to evaluate how current W-2 tax savings weigh against retirement tax rates.

Our free IRA Calculator is a comprehensive comparison model. By inputting your current balance, periodic contributions, expected return rate, and marginal tax brackets (both today and in retirement), the tool estimates the ending after-tax balances of **Traditional/SIMPLE/SEP IRAs**, **Roth IRAs**, and **Regular Taxable Accounts** to pinpoint your most lucrative option.

Traditional vs. Roth IRA: The Core Tax Pivot

The primary decision for most investors is choosing between a Traditional IRA and a Roth IRA, which differ in the timing of their tax benefits:

1. Traditional IRA

Contributions are made pre-tax (and are tax-deductible for most earners), reducing your current taxable income. Earnings compound tax-deferred until retirement, at which point **withdrawals are taxed as ordinary income**. Because most retirees fall into a lower tax bracket than they did during their prime working years, tax-deferred accounts are highly popular. Traditional IRAs also mandate Required Minimum Distributions (RMDs) starting at age 73.

2. Roth IRA

Contributions are made with after-tax dollars (no deduction today), but the account compounds tax-free and **all retirement withdrawals are 100% tax-free**. Roth IRAs are exempt from lifetime RMDs.
Project Roth IRA variables on our dedicated Roth IRA Calculator.

SEP and SIMPLE IRAs for Businesses and Self-Employed

The IRS offers specialized IRAs for small businesses, contractors, and self-employed individuals:

1. SEP IRA (Simplified Employee Pension)

Designed for self-employed individuals or business owners, a SEP IRA allows employers to make tax-deductible contributions directly into their employees’ accounts.
The Limit: For the **2026 tax year, the contribution limit is the lesser of 25% of compensation or $72,000** (almost ten times the cap of standard Traditional IRAs). All contributions are 100% vested immediately, and catch-up contributions for age 50+ are not permitted.

2. SIMPLE IRA (Savings Incentive Match Plan for Employees)

Designed for businesses with 100 or fewer employees, a SIMPLE IRA has lower administrative costs than a 401(k) plan. Employers must choose between two matching options: (1) match employee contributions dollar-for-dollar up to 3% of compensation, or (2) make a 2% non-elective contribution for all employees regardless of participation.
The Limit: In 2026, the employee contribution cap is **$17,000** ($4,000 catch-up for 50+, $5,250 for ages 60–63).
The Warning: The early withdrawal penalty for a SIMPLE IRA is a severe **25%** if taken within the first two years of opening the account.

IRA Rollovers: Consolidating Retirement Accounts

You can execute a tax-free rollover of previous employer plans (401k, 403b, or SIMPLE IRAs) into a personal Traditional IRA. To maintain tax-sheltered status, the transaction must be reported to the IRS using W-2 **Form 1099-R** (to report the distribution from the old plan) and **Form 5498** (to report the rollover contribution). Direct rollovers (transferred between custodians) avoid withholding taxes, and must be completed within **60 days** if processed by check.

IRA vs. 401(k) Accounts

While both are defined contribution plans, they serve different investment styles:

• Contribution Limits: 401(k) limits are significantly higher ($24,500 in 2026 vs. $7,500 for IRAs). Model these variables on our 401K Calculator.
• Investment Flexibility: 401(k) accounts restrict you to a pre-selected mutual fund menu with admin fee layers. IRAs can be opened at almost any brokerage, offering limitless investment choices, including individual stocks, low-cost index funds, ETFs, robo-advisors, and REITs.

Self-Directed IRAs (SD-IRAs) and Prohibited Transactions

A **Self-Directed IRA** features the same contribution and tax rules as standard IRAs but allows you to invest in alternative assets such as physical real estate, private equity, tax liens, and digital currencies.
Prohibited Transactions: The IRS strictly forbids SD-IRAs from holding life insurance, S-corporation stock, collectibles (art, stamps, antiques), or personal-use real estate (you cannot live in, rent out, or perform maintenance on properties owned by your SD-IRA).

Audit your total retirement timeline on our Retirement Calculator or evaluate compound interest growth on the Interest Calculator.

Frequently Asked Questions (FAQ)

Can I contribute to both a 401(k) and an IRA?

Yes. You can contribute to both plans in the same tax year. However, if you are covered by an employer plan, your ability to deduct Traditional IRA contributions is phased out at higher income thresholds.

What is a backdoor Roth IRA?

A backdoor Roth IRA is a legal strategy used by high earners whose incomes exceed direct Roth IRA limits. It involves making a non-deductible contribution to a Traditional IRA and immediately converting it to a Roth IRA. Compare these rules on our Roth IRA Calculator.

What is the penalty for early Traditional IRA withdrawals?

Withdrawing funds before age 59½ triggers a **10% IRS early distribution penalty** plus ordinary income taxes, unless you qualify for an exception (such as qualified first-time homebuyer up to $10,000, higher education costs, or permanent disability).

What is the difference between direct and indirect rollovers?

A direct rollover moves funds directly from trustee to trustee without you touching the cash, incurring no taxes. An indirect rollover pays the funds to you via check; you have 60 days to deposit the entire sum into a new IRA, and the former employer is required to withhold 20% for federal taxes, which you must replace out-of-pocket to avoid penalties.