Finlybox guides

Learn before you decide.

In-depth guides that explain the context behind each decision — written to be read alongside our calculators, not instead of them.

Featured guide · Housing

Is 2026 a good time to buy a house?

With mortgage rates hovering around 6.5–7%, the calculus on buying vs. renting has shifted significantly from the low-rate era. Here's what the numbers actually say — and what they don't.

8 min read Updated June 2026 Includes calculator

Housing

All housing guides

Is 2026 a good time to buy a house?

How rising rates and inventory changes affect the rent vs. buy math in today's market.

Rent vs. Buy Calculator

Average break-even point by US city (2026)

How long you need to stay for buying to beat renting in 30 major metros.

Rent vs. Buy Calculator

What does a 30-year mortgage really cost?

The full picture of interest, taxes, insurance, and maintenance over three decades.

Affordability Calculator

7 minApril 2026

Career

All career guides

How to negotiate your salary — and actually win

The lifetime cost of skipping negotiation on your first offer is staggering. Here's how to do it.

Salary Negotiation ROI

Is an MBA worth it in 2026?

Return on investment by school tier, field, and career trajectory. The honest math.

Grad School ROI Calculator

Freelance vs. full-time: what the math actually says

After taxes, benefits, and volatility — does going independent make financial sense?

Self-Employed vs. W-2

8 minApril 2026

Retirement

All retirement guides

What is the 4% rule — and does it still work in 2026?

The foundational safe withdrawal rate concept, updated for today's interest rate environment.

Early Retirement Calculator

Roth vs. traditional IRA: which one wins for you?

It depends entirely on whether your tax rate will be higher now or in retirement. Here's how to figure it out.

Roth vs. Traditional Calculator

When should you claim Social Security?

Early at 62, full at 67, or delayed to 70 — the break-even math for every scenario.

Social Security Timing

8 minApril 2026

Health

All health guides

HDHP vs. PPO: how to actually choose the right plan

High-deductible plans aren't always cheaper. Here's the framework for making the right call at open enrollment.

HDHP vs. PPO Calculator

Why your HSA is the most underrated retirement account

Triple tax advantage, no use-it-or-lose-it rule after 65, and most people barely use it. Here's the strategy.

HSA Growth Calculator

What to do when you lose job-based health insurance

COBRA, marketplace plans, Medicaid — how to compare your options quickly and avoid a gap in coverage.

COBRA vs. Marketplace

5 minApril 2026

Auto

All auto guides

Buying vs. leasing a car: what the math actually says

Leasing looks cheaper monthly. It almost never is over time. Here's how to run the real numbers.

Buy vs. Lease Calculator

EV vs. gas: the true cost over 5 years

EVs cost more upfront but less to fuel and maintain. Here's when the math actually tips in their favor.

EV vs. Gas Break-Even

New vs. used car: when does buying new actually make sense?

New cars lose 20% of their value the moment you drive off the lot. But used isn't always the obvious winner.

New vs. Used Car

5 minApril 2026

Debt

All debt guides

Debt avalanche vs. snowball: which payoff method wins?

Avalanche saves more money. Snowball builds momentum. Here's the real-dollar difference between them.

Debt Payoff Priority

How balance transfers actually work — and when they're worth it

A 0% offer can save you thousands. But transfer fees and revert rates can turn a good deal bad fast.

Balance Transfer Calculator

Student loan repayment plans: which one is right for you?

Standard, SAVE, PSLF, refinancing — each option makes sense in different income and career scenarios.

Student Loan Repayment

7 minApril 2026

Savings & Investing

All savings guides

Savings & Investing

How compound interest actually works — and why it matters so much

A dollar saved at 25 is worth dramatically more than a dollar saved at 35. Here's the math behind why.

Compound Interest Calculator

Savings & Investing

Index funds explained: why most investors can't beat them

Over any 15-year period, roughly 90% of active funds underperform their benchmark. Here's why — and how to pick one.

Investment Growth Calculator

Savings & Investing

What inflation does to your savings — and how to fight it

Money sitting in a 0.01% savings account loses purchasing power every year. Here's what that actually costs you.

Inflation Impact Calculator

5 minApril 2026