Guides
Plain-English explainers on the math, rules, and strategies behind every CalcProLabs calculator.
Reverse Mortgages: 7 Things Lenders Don't Want You to Misunderstand
Reverse mortgages (HECMs) have a complicated reputation. Here are the seven realities seniors should know before signing.
Amazon FBA Pricing: Hit Your Real Margins, Not the Dashboard Ones
Amazon's built-in profit estimates miss several costs. Here's the full math you need to price products that actually make money.
When to Refinance Your Mortgage (and When Not To)
The "rate dropped 0.5%" rule is incomplete. The real test: do you stay long enough to recoup the closing costs?
Cap Rate vs. Cash on Cash: Which Metric Should You Trust?
The two most-cited real estate investment metrics measure different things. Use both — and know which one matters when.
Roth vs. Traditional IRA: Which Wins for You?
A decision framework, not a one-size-fits-all answer. When Roth wins, when Traditional wins, and the situations where the answer flips.
PMI Explained: When You Pay It, How Much, and How to Cancel
Private mortgage insurance costs hundreds per month. Here is exactly when lenders require it, what determines the cost, and how to get rid of it ASAP.
S-Corp Reasonable Salary: The IRS Rules in Plain English
How the IRS decides what 'reasonable compensation' means for S-Corp owners, the factors they audit on, and how to defend your number.
The HSA Triple Tax Advantage Explained
How the only triple-tax-advantaged account in the US tax code works, who qualifies, and how to use it as a stealth retirement vehicle.
Workers' Comp Settlement Guide: What to Expect by State
Understand how workers' compensation settlements are calculated, what factors drive value, and when to accept or negotiate.
How to Calculate Compound Interest (With Examples)
Learn the compound interest formula, see worked examples for monthly and daily compounding, and understand why time matters more than rate.