The backdoor Roth IRA sounds simple: contribute $7,000 to a traditional IRA, convert it to a Roth, and bypass the income limits that would otherwise block a direct Roth contribution. But if you already have $80,000 sitting in a traditional IRA from a previous 401k rollover, the IRS applies the pro-rata rule — and what you thought was a tax-free conversion becomes mostly taxable. The calculation shows exactly why: your $7,000 after-tax contribution gets diluted by the $80,000 in pre-tax money, and only 8% of your conversion is actually tax-free. Here's how the math works, how to fix it, and what to do before you attempt a backdoor Roth.

The old rule said subtract your age from 100 and put that percentage in stocks — which means a 57-year-old should hold 43% stocks and 57% bonds. Professional target-date funds built for someone retiring in 2032 hold approximately 65% stocks and 35% bonds. These two numbers are very different, and the discrepancy matters enormously over the next 8 years. Here's what the actual data says about stock-to-bond allocation for someone in their late 50s with a real retirement date on the horizon, why the traditional age-based rule undersells what most people need, and what to actually do with your 401k allocation between now and retirement.

Once you turn 50, the IRS lets you contribute more to your retirement accounts than younger workers can. In 2024, you can put $30,500 into a 401k instead of $23,000, and $8,000 into an IRA instead of $7,000. If you use these higher limits consistently from age 50 to 65, you accumulate approximately $210,000 more in retirement savings than someone who stops at the standard limits — assuming a 7% average return. Starting in 2025, SECURE 2.0 adds a second layer: a 'super catch-up' provision for ages 60-63 that pushes the 401k limit even higher. Here's everything you need to know and the math behind why catch-up years matter most.

If your child is 5 years old today, you have roughly 13 years until college tuition bills start arriving. To reach $100,000 in a 529 plan by then — assuming a 7% average annual return — you need to contribute approximately $406 per month starting now. Wait until age 8, and that same $100,000 goal requires $579/month. Wait until age 12, and you’re looking at $1,074/month. The math behind 529 college savings is less about whether to start and more about how much the delay costs you in monthly contributions. Here’s the full breakdown by starting age.