Car down payments
How much should I put down on a car?
See how cash down, trade equity, rebates, taxes, fees, APR, and loan term work together, then compare the result with the target monthly payment.
Read the car down-payment guidePersonal finance guides
Practical personal finance guides
Understand the calculations, assumptions, and tradeoffs behind auto loans, home affordability, mortgages, emergency savings, and the free 2025 tax estimate workbook.
Start with the question
Use the numbers to make a clearer comparison.
These concise guides explain what affects each result, which assumptions matter most, and when an estimate should be verified against a lender, taxing authority, source document, or qualified professional.
Emergency savings
How much should I have in an emergency fund?
Build a planning range from the expenses that would continue, reliable income, and the risks that could make a longer recovery period useful.
Read the emergency-fund guideMortgage payments
What is included in a monthly mortgage payment?
Understand principal, interest, property taxes, homeowners insurance, mortgage insurance, HOA dues, and costs that remain outside the lender payment.
Read the mortgage-payment guideMortgage amortization
How do mortgage principal and interest change over time?
Fixed-rate mortgage payments generally remain level, but the share applied to interest declines as the balance falls. An amortization schedule shows each payment, the remaining balance, cumulative interest, and how optional additional principal may change payoff timing.
Create a mortgage amortization scheduleEmergency savings
How much emergency fund should you consider?
A useful emergency savings target begins with expenses that would continue during an income interruption. Reliable continuing income, expenses that could be paused, household income sources, dependents, health concerns, and employment stability can change the planning range.
Estimate an emergency fund target2025 tax estimates
How do you compare estimated tax with amounts already paid?
The free workbook estimates federal income tax and simplified resident state income tax, then compares those estimates with withholding and payments. Official tax forms, state instructions, credits, local taxes, and individual circumstances may require additional entries or professional review.
Get the free 2025 tax estimate workbookEducational content is general. Material decisions may require source documents and a qualified financial, tax, legal, insurance, or lending professional who can review the complete situation.