Guides
Deeper explanations behind the numbers our calculators produce.
Side Hustle Taxes: What Percentage of Your 1099 Income Is Actually Yours
Why 1099 side hustle income gets taxed at your marginal rate plus the full 15.3% self-employment tax, and exactly what percentage to set aside from every payment.
The HSA Triple Tax Advantage: What Your Contribution Really Saves You
How HSA contributions get deducted, grow tax-free, and withdraw tax-free — and exactly how much that's worth in federal tax, state tax, and FICA on a real contribution.
529 Plans: Why the Sticker Price Isn't What You'll Actually Pay
Why college costs rise faster than general inflation, how to project a 529 plan against the real inflated cost of college, and what to do if the numbers show a gap.
Roth vs. Traditional IRA: The Tax Rate Question That Decides It
Why comparing a Roth and Traditional IRA comes down to one question — is your tax rate higher today or in retirement — and how to think it through when you can't know for sure.
Personal Loans: What the Origination Fee Really Costs You
Why the advertised rate on a personal loan isn't the whole cost, how origination fees are usually deducted upfront, and how to compare offers on total cost instead of rate alone.
The Real Cost of Only Paying the Credit Card Minimum
Why credit card minimum payments barely make a dent, how the minimum shrinks along with the balance, and what a fixed payment saves in time and interest instead.
Home Equity Loan vs. HELOC: How to Choose
The real differences between a home equity loan and a HELOC, why the HELOC payment jumps after the draw period, and how to pick the right one for your situation.
Mortgage Refinancing: When It's Actually Worth It
How to figure out if a mortgage refinance actually pays off, why the break-even point matters more than the rate alone, and what closing costs really include.
Compound Interest Explained: Why Time Beats Rate
A plain-English explanation of how compound interest works, why starting early beats a higher rate, and a worked example you can follow by hand.
Debt Snowball vs. Avalanche: How to Pick a Method
A breakdown of the debt snowball and debt avalanche payoff methods, the real math behind each, and how to decide which one fits your situation.
How Big Should Your Emergency Fund Really Be?
How to figure out your real emergency fund target based on job stability and household income, not just a generic rule of thumb.
Biweekly Mortgage Payments Explained: The Real Math
How biweekly mortgage payments actually work, why they shave years off a loan, and a free way to get the same result without a special program.
Rent vs. Buy: How to Actually Decide
Why comparing a mortgage payment to a rent check misses the real picture, and how to think about the decision in terms of final net worth instead.
The 50/30/20 Budget Rule, Explained
What the 50/30/20 budgeting framework actually recommends, where it breaks down, and how to adapt it to your real situation.
Student Loan Repayment Strategies That Actually Save Money
How extra student loan payments reduce what you owe, when it's worth paying extra versus investing, and what to check with your servicer first.
Coast FIRE Explained: When Your Savings Can Take Over
What Coast FIRE means, how to calculate your coast number, and why reaching it changes how much you need to save going forward.
Why Net Worth Is the Number That Actually Matters
Why tracking net worth beats tracking income or savings alone, what counts as an asset vs. a liability, and how to measure real progress.
How Overtime Pay Actually Works
How overtime multipliers are calculated under the FLSA, common mistakes employees make estimating their overtime paycheck, and how to check your own math.
How Much Car Can You Actually Afford?
A income-based framework for setting a car budget, how loan term and down payment change what you can afford, and why the sticker price isn't the real cost.
What a 401(k) Early Withdrawal Really Costs You
Why an early 401(k) withdrawal costs more than it looks, what the 10% penalty does and doesn't apply to, and better alternatives to consider first.
Retirement Catch-Up Contributions: What They're Worth
How 401(k) and IRA catch-up limits work at 50+ and the enhanced 60-63 window, using the IRS's 2026 figures, and why the extra room matters.
Self-Employment Tax Explained: What You Owe
What self-employment tax actually is, how the 2026 Social Security wage base caps part of it, and why it's separate from income tax on your profit.
Why a Raise Doesn't Feel as Big as It Sounds
Why a percentage raise doesn't translate directly into the same percentage increase in your paycheck, and what marginal tax rate really means for a raise.