Roth vs. Traditional Comparison

Roth vs. Traditional Comparison settles the question that dominates retirement account choices: pay tax now, or pay it later. The tool simulates both paths from the same gross contribution. On the Traditional side the full pre-tax amount goes into the account, compounds untouched, and is taxed at your expected retirement rate on withdrawal. On the Roth side the same gross amount is taxed at today’s rate first, so less money goes in, but nothing is taxed at the end. Comparing the final after-tax values is the only fair comparison, and it makes the underlying rule obvious: Roth wins when your retirement tax rate will be higher than today’s, Traditional wins when it will be lower. A year-by-year table shows both balances growing side by side, and a verdict panel names the winner with the dollar difference.

Key Features

• Equal Gross Contribution Basis

  Both paths start from the same pre-tax amount, with the Roth contribution reduced by today’s tax. Comparing equal deposits instead would bias the result toward Roth.

• After-Tax Final Values

  Traditional balances are taxed at your retirement rate before comparison. Comparing raw balances is the most common mistake in this decision.

• Two Tax Rate Inputs

  Separate fields for today’s rate and your expected retirement rate. The gap between them is what actually decides the answer.

• Plain-Language Verdict

  States which option wins and by how much, rather than leaving you to compare two large numbers. Also shows the reduced Roth contribution amount.

• Year-by-Year Comparison Table

  Both balances shown for every year until retirement. Useful for seeing when the Traditional lead narrows after tax.

• Country-Agnostic Maths

  No bracket tables are used, only the rates you supply — so the comparison works for any country’s equivalent pre-tax and post-tax accounts.

1. 1

   Enter your ages

   Current age and planned retirement age set the compounding horizon, which is the biggest driver of the result.

2. 2

   Enter the annual contribution

   Use the gross pre-tax amount you can afford to commit each year.

3. 3

   Set your current tax rate

   Use your marginal rate today — the rate a Traditional deduction would actually save you.

4. 4

   Estimate your retirement tax rate

   Consider your expected retirement income. Many people are lower, but a large pre-tax balance can push it higher.

5. 5

   Read the verdict and table

   Check which option wins and by how much, then open the year-by-year table to see how the gap develops.

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