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SpendingPlan101

One guide per problem

In-depth guides

The long reads. Each one is the definitive piece on its topic, kept current, and the post everything else in that cluster links back to.

The rest of the guides

RetirementEditor's pick

The 4% Rule, Examined

The 4% rule originated in a 1994 historical study of 30-year retirements. Here is what it actually proved, what critics get right, and how dynamic guardrails work.

8 min read
Taxes

The HSA Triple Tax Advantage

Deductible going in, untaxed while invested and untaxed for qualified medical costs, with a 2026 limit and an eligibility test people skip.

5 min read
Taxes

How to Adjust Your W-4

A $3,600 refund is $300 a month that stayed out of your paycheck. Use the IRS estimator, then translate its result onto Form W-4.

5 min read
TaxesEditor's pick

Your Tax Season Checklist

Gather the forms your return actually needs, including the four records most likely to arrive after you think you are ready to file.

7 min read
College Savings

FAFSA, Without the Panic

The 2026-27 FAFSA uses 2024 tax information and current reportable assets. Gather records, identify contributors and request a review after income loss.

7 min read
Passive IncomeEditor's pick

Passive Income, Honestly Rated

At an assumed 4% yield, $500 monthly takes $150,000 before tax. Compare nine income sources by capital, work and the risk behind the payment.

9 min read
College SavingsEditor's pick

The 529 Plan, Explained

A 529 plan can shelter education investment gains. Compare state tax savings, fees and the cost of withdrawing money for something else.

9 min read
Retirement

What to Do With an Old 401(k)

Four options, and the default of leaving it is rarely the best one. The fee comparison that decides it, and the rollover mistake that triggers a tax bill.

6 min read
Credit

Disputing an Error on Your Credit Report

You have a legal right to an investigation within 30 days. The letter that gets results, what to enclose, and the step where most disputes quietly fail.

7 min read
Retirement

Roth or Traditional: The Decision Rule

It is one comparison: your marginal rate now against your expected rate in retirement. Everything else is a tiebreak, and at equal rates the two are identical to the dollar.

7 min read
Banking

FDIC Insurance Limits, Explained

$250,000 per depositor, per bank, per ownership category. The third clause is the one that matters, and it is how a couple insures $780,000 at a single institution without opening anything new.

6 min read
BankingEditor's pick

High-Yield Savings vs CDs vs Money Market

Three accounts, one question: how soon do you need it, and what does waiting pay? On $20,000 the spread between the best and worst place to put it is $774 a year.

7 min read
RetirementEditor's pick

The 401(k) Match Is the Best Return You Will Ever Get

A 50% match is a 50% return before the money is invested in anything. On a $70,000 salary, not contributing enough to capture it leaves $2,100 a year on the table, which is $132,823 over a career.

6 min read
CreditEditor's pick

What Actually Moves Your Credit Score

Two of the five factors are worth 65% of the score. The other three get argued about far more than they are worth, and one of them you cannot change at all.

7 min read
Budgeting

Zero-Based Budgeting, Step by Step

Every dollar gets a job before the month starts. The six steps, the mid-month reconciliation nobody mentions, and roughly how long the first one takes.

8 min read
Debt Payoff

Invest or Pay Off Debt First?

There is a rate above which paying the debt wins and below which investing does, and it sits exactly at the return you expect. Three households, $500 a month, ten years, and three different answers.

8 min read
Debt PayoffEditor's pick

Avalanche vs Snowball: What Each One Costs You

The avalanche saves more money. The snowball gets finished more often. On four real balances that difference is $552.79 and one month, and here is when $552.79 is worth paying.

10 min read
Budgeting

Budget Categories That Actually Work

Most category lists are too fine to survive February. Here are the sixteen that hold, what belongs in each, and the four that are missing from almost every budget that failed.

8 min read
InvestingEditor's pick

Index Funds Explained Without the Jargon

An index fund is a rule, not a manager. What the rule costs, what it buys, and why 0.85% instead of 0.04% takes $70,624 off a thirty-year balance.

11 min read
SavingEditor's pick

The Emergency Fund, Sized Honestly

Every article says three to six months. None of them says three to six months of what, and on one household that reading is worth $10,410. The sizing test, worked at two incomes.

11 min read

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