Practical, USA-focused explainers on debt, loans, taxes and saving — written to be genuinely useful.
New cars get cheaper financing rates — but used cars cost far less overall. We compare average 2026 rates, terms, and a verified head-to-head loan example so you can pick the better deal.
Read guide →The 15% rule says your car payment shouldn't exceed 15% of your monthly take-home pay — and all car costs combined should stay under 20%. See the verified math on what that buys at a $60,000 income.
Read guide →The 28/36 rule is how lenders judge your mortgage affordability: housing costs under 28% of gross income, all debts under 36%. Learn both ratios, see a verified $120,000-income example, and find your own ceiling.
Read guide →Refinancing only saves you money if you stay past the break-even point. Learn the one-line formula, see a verified $350,000 example, and know when to refinance — or walk away.
Read guide →An escrow account is where your mortgage servicer collects 1/12 of your property taxes and homeowners insurance each month, then pays those bills for you. Here's the PITI breakdown, a real-numbers example, and why your payment went up.
Read guide →Paying extra toward principal can save tens of thousands in interest and shave years off a 30-year loan — but first check your prepayment penalty clause. Here's how the rules work and a worked example of the savings.
Read guide →A 30-year fixed buys payment certainty; an ARM buys a lower rate for 5–10 years in exchange for reset risk. On a verified $400,000 example, a 6.50% ARM saves $15,130 over five years — but the worst-case reset costs more than the fixed.
Read guide →FHA loans accept credit scores as low as 580 with 3.5% down, but their mortgage insurance can last the life of the loan. Here's the side-by-side math that decides which one is right for you.
Read guide →PMI typically costs 0.3%–1.5% of your loan per year, or roughly $30–$70 a month per $100,000 borrowed. Here's the formula, a worked example, and what moves your rate.
Read guide →Your debt-to-income ratio is the number that decides whether a lender says yes. See exactly how it's calculated, the front-end and back-end ratios explained, the 2026 limits by loan type, and a verified worked example.
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