US finance guides

These articles are built around real user jobs: sketch a mortgage payment, compute DTI, read FICA on a paycheck, plan debt payoff order, or compare Loan Estimates. Every guide includes calculator anchor text, input sources, examples, FAQ, and public agency sources.

Educational only — not financial, tax, lending, or investment advice.

Jump to core calculators

Prefer tools first? Start here, then open the matching guide.

Full directory: all calculators · home

How to use this hub

Buying or refinancing: read mortgage payment basics and run the Mortgage Payment Calculator.
Comparing lender offers: use the Loan Estimate checklist + Closing Cost Calculator.
DTI before applying: understanding DTI + DTI calculator.
Paycheck literacy: paycheck & FICA + FICA calculator.
Paying down balances: debt payoff strategies + snowball vs avalanche.

Mortgage & home

P&I, PITI, amortization, Loan Estimates, and housing payment literacy.

Mortgage payment basics: P&I, PITI, and escrow
Understand how a level monthly mortgage payment is built, separate P&I from taxes/insurance/MI, and prepare better questions for lenders using official Loan Estimates.

Primary tools: Mortgage Payment Calculator · PITI Calculator · FHA Mortgage Calculator
Loan Estimate checklist for shoppers
Walk a Loan Estimate page-by-page, extract the right inputs for calculators, and compare two offers on total cost — not vanity monthly payments alone.

Primary tools: Loan Comparison · Mortgage Payment · Closing Cost

Debt & DTI

Front-end/back-end ratios, snowball vs avalanche, and revolving payoff math.

Understanding debt-to-income (DTI)
Compute and interpret front-end and back-end DTI with real debts and gross income, then connect results to affordability and payment tools.

Primary tools: DTI Calculator · Affordability Calculator · Take-Home Pay Calculator
Debt payoff strategies (math-first)
Project card payoff months/interest and compare snowball vs avalanche ordering for multiple debts without treating the site as credit counseling.

Primary tools: Credit Card Payoff · Snowball vs Avalanche · DTI

Paycheck & FICA

Social Security, Medicare, take-home orientation, and hourly/salary conversion.

Paycheck and FICA orientation
Estimate employee FICA and a rough net paycheck using document-based inputs, while knowing the limits versus official IRS withholding tools.

Primary tools: FICA Calculator · Take-Home Pay Calculator · Hourly ↔ Salary

Quality bar for every guide

States the job (what you can finish today)
Names where inputs come from (pay stubs, Loan Estimates, statements)
Links calculators with human anchor text via shared helpers
Examples, mistakes, checklist, FAQ (≥6), public sources
Clear “not financial/tax/lending advice” limit

Trust pages: methodology, accuracy & sources, editorial policy.