Guides

How IRC §72(t)(2)(A)(iv) and IRS Notice 2022-6 define penalty-free early IRA withdrawals — the RMD, fixed amortization, and fixed annuitization methods with the IRS worked example, the interest-rate cap rule, and the recapture risk that makes every SEPP an irrevocable, multi-year commitment.

How the IRS calculates the taxable fraction of a Roth IRA conversion — the Form 8606 math, the clean-backdoor case, and why your year-end balance across all non-Roth IRAs determines the outcome.

Why a sole proprietor's SEP-IRA or Solo 401(k) employer contribution is 20% of net earnings, not 25% — the circular compensation definition, the algebraic proof, a line-by-line worked example tied to IRS Publication 560, and the 2026 contribution caps.

How IRC §408A(d)(3)(F) and the Pub 590-B ordering rules turn annual Roth conversions into penalty-free income before age 59½ — the 5-year clock, why the withdrawal is tax-free, the five-year bridge problem, a full worked example, and how the ladder compares to a 72(t)/SEPP.

The 4% rule reports a historical success rate, not a promise. Here's what the Trinity Study actually measured, why a 50-year horizon changes the math, and how to treat the number as a starting assumption.

Coast FIRE only works if decades of growth and inflation assumptions hold with zero further contributions. Here's how to stress-test that bet before you stop saving.

A 1% expense ratio doesn't just cost 1% per year — it quietly claims a large share of your terminal wealth because the fee compounds on money you never got to keep. This guide shows how to measure fee drag as a percentage of final balance, not annual cost.

Because markets rise more often than they fall, lump-sum investing outperforms dollar-cost averaging in the majority of historical periods. This guide explains the data, names the assumptions, and helps you choose deliberately rather than by default.

Most Roth vs. Traditional comparisons use equal dollar contributions, which quietly tilts the math toward Roth. The honest comparison holds after-tax cost constant — and when you do that, the decision comes down almost entirely to current versus future marginal tax rates.

The order of investment returns, not their average, determines whether a withdrawal portfolio survives retirement. This guide explains the mechanism, shows the math with a worked example, and identifies why the first decade of retirement is disproportionately decisive.

Rebalancing rarely boosts long-run returns — its real job is preventing your portfolio's risk profile from drifting away from your target. This guide explains the mechanism and helps you set sensible drift bands instead of chasing a phantom rebalancing bonus.

Most investors underweight international stocks out of familiarity, not evidence. This guide walks through the range from market-cap weighting to Vanguard's own recommendation and helps you choose a US/international split deliberately.

Reinvesting a dividend buys shares that pay their own dividends — a gap that's trivial in year one and can be tens of thousands of dollars over decades. This guide shows the mechanism, a worked example, and the tax treatment reinvestment doesn't erase.

A staking platform's headline yield is rarely what you'll actually earn — part of the gap is legitimate APR-to-APY compounding math, part is commission, gas, and token-price risk the headline number never mentions. This guide separates the two.

Every dollar of reliable part-time income is worth a precise, calculable amount of portfolio you no longer need — the same withdrawal-rate math run in reverse. This guide shows the identity, a worked example, and why the active-withdrawal phase carries more sequence-of-returns risk than Coast FIRE.

"25 times your spending" is only correct at a 4% withdrawal rate — change the rate and the multiplier, and every tier's FIRE number, changes with it. This guide separates the identity behind the multiplier from the community conventions behind Lean, Standard, and Fat FIRE.

A 401(k) or IRA withdrawal before 59½ carries a 10% additional tax by default — but a specific, IRS-defined list of exceptions can waive it, and the list differs between IRAs and employer plans. This guide separates general, plan-specific, and SECURE 2.0 exceptions, and explains why qualifying removes the penalty, not the tax.

"Bonds equal your age" and Vanguard's actual target-date glide path can diverge by 25 percentage points at the same age, because they're built on different assumptions. This guide breaks down all four rules, why they disagree, and what none of them can know about your specific situation.

The 4% rule describes one specific withdrawal strategy — a fixed, inflation-adjusted dollar amount every year. Guardrail and dynamic-spending research finds meaningfully higher sustainable rates by letting spending flex with the portfolio instead. This guide compares the strategies and what each one trades away.

The mega backdoor Roth uses after-tax 401(k) contributions and the overall IRC §415(c) limit — a completely different mechanism from the IRA pro-rata rule that governs the regular backdoor Roth. This guide separates the two strategies and walks through the 2026 dollar limits and plan-design requirements.

The three common minus-age stock/bond rules span exactly 20 percentage points at any age by construction, and Vanguard's glide path can widen that further. This guide names the concrete factors — time horizon, income stability, other guaranteed income, sequence-of-returns risk — that argue for one end of the spread over the other.

Staking rewards compound your token balance, not your dollar wealth — a rising or steady APY can coincide with a falling dollar value if the token's price drops by more than the reward rate adds. This guide separates yield in tokens from return in dollars.