Guides
The math behind the money decisions, in plain English. Every number in these guides is computed by the same verified engines that power our calculators — and every guide pairs with a free tool for your own numbers.
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Mortgage
How Amortization Works
Why early payments are mostly interest, when you truly own half the house, and how to read a schedule.
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Mortgage
PMI Explained: Cost, Rules, Removal
What PMI costs, the federal 80/78% cancellation rules, and three ways to kill it early.
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Mortgage
How Extra Mortgage Payments Really Work
What $100, $200, or $500 extra actually buys — and the three mistakes that cancel the benefit.
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Mortgage
Income Needed for a $250k–$1M House
Real income tables under the 28% rule, with every assumption shown and adjustable.
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Mortgage
15 vs. 30-Year Mortgage: The Real Math
Payments, lifetime interest, 5-year equity — plus the "30 paid like a 15" third option, priced.
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Mortgage
Property Taxes & Escrow, Explained
Why payments rise after year one, escrow shortage letters, and the exemptions buyers forget to file.
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Mortgage
Homeowners Insurance in Your Payment
What drives premiums (state, roof, deductible), the year-two jump, and cutting cost without gutting coverage.
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Mortgage
FHA MIP vs. Conventional PMI
A worked $350k comparison: who wins by credit tier, and why insurance duration beats rate.
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Mortgage
The VA Funding Fee, Explained
Every tier, the exemptions, and the finance-vs-upfront math on a real example.
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Mortgage
How Much Down Payment Do You Really Need?
Program minimums 0–20%, what each tier costs monthly, and when smaller is smarter.
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Mortgage
Mortgage Points: When They’re Worth It
The break-even bet on loan longevity — and the refinance risk that kills points.
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Mortgage
First-Time Homebuyer Costs Checklist
Every cost beyond the down payment, itemized — closing, prepaids, move-in, and the cushion.
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Mortgage
HOA Fees and Your Mortgage Budget
The payment that never amortizes: DTI impact, special assessments, and six due-diligence questions.
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Mortgage
Credit Score Needed by Loan Type
Minimums for each program — and the 0.5–0.75% rate cost of score tiers, in dollars.
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Mortgage
Closing Costs: What’s in Them
The four buckets on your Loan Estimate, which lines are shoppable, and how state rules differ.
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Debt
Snowball vs. Avalanche: The Real Math
A worked example where the methods truly differ, and an honest rule for choosing.
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Debt
How Credit Card Interest Is Calculated
Daily compounding, the grace-period cliff, and what fixed payments do to the timeline.
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Debt
Why Minimum Payments Keep You in Debt
The declining-minimum design, and the one mechanical change that collapses it.
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Debt
How to Pay Off $10k of Card Debt
Four realistic plans priced in months and interest — brute force, transfer, loan, hybrid.
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Debt
Consolidation: When It Helps vs. Hurts
Three tests that separate real rate cuts from repackaged trouble — and the refill trap.
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Debt
Simple vs. Amortized vs. Compound Interest
The three machines behind every debt, and how the label changes what extra payments are worth.
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Debt
Snowflaking: Micro-Payments That Work
How $5–$25 windfalls, sent same-day, take a year off a card — with the math.
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Debt
Debt-to-Income Ratio, Explained
Front-end vs back-end, real approval limits by program, and the fastest DTI fixes.
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Refinance
When Refinancing Is Worth It
Break-even months, the term-reset trap, no-closing-cost decoded — with worked numbers.
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Refinance
Refinance Closing Costs Breakdown
Line by line — including the title reissue rate most borrowers never claim.
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Refinance
Cash-Out vs. HELOC vs. Home Equity Loan
Three doors into your equity, matched to the job — and the one question that decides.
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Refinance
Streamline Refis (FHA & VA IRRRL)
No appraisal, minimal docs, 0.5% VA fee — the shortcut existing FHA/VA borrowers miss.
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Refinance
Does Refinancing Hurt Your Credit?
The three small hits, the recovery timeline, and the shopping-window rule.
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Auto
How Car Loan Interest Works
What 48 vs 84 months really costs, negative equity, and the 20/4/10 sanity check.
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Auto
New vs. Used Car Loans: The Real Math
Used finances worse but costs less — a worked comparison including depreciation.
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Auto
Upside Down on a Car Loan: Options
Five real exits ranked — and why rolling the gap forward digs the deepest hole.
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Auto
Trade-Ins & Sales Tax, State by State
Most states tax the price after trade-in credit — which don’t, and how payoffs flow through.
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Auto
The 20/4/10 Car Buying Rule
What each number protects, which to bend first, and how to apply it with the calculators.