Guides
15-Year vs 30-Year Mortgage: How to Decide
Compare how a 15-year and 30-year fixed mortgage change your monthly payment, total interest and cash flow, using current Freddie Mac averages and the mortgage calculator.
2026 Federal Tax Brackets Explained
How 2026 US federal income tax brackets work, the difference between marginal and effective rates, standard deduction amounts from Rev. Proc. 2025-32, and how to estimate your tax.
401(k) Contributions: Pre-Tax vs. Roth
Compare traditional and Roth 401(k) contributions — taxes now versus later, effects on take-home pay, 2026 contribution limits, employer match, and how to decide.
Debt Avalanche vs. Debt Snowball
Compare the debt avalanche and snowball payoff methods — interest saved versus quick wins — and model extra payments with the debt payoff calculator.
How Long Should a Car Loan Be?
Choose an auto loan term by balancing monthly payment, total interest and negative equity risk — with scenarios from the auto loan calculator and CFPB/FTC consumer guidance.
How Long Will It Take to Pay Off Your Credit Card?
See why credit card minimum payments stretch for years, how APR drives the timeline, what to watch with balance transfers, and how to model a payoff plan.
How Much Do You Need to Retire?
Estimate retirement spending needs, how Social Security and savings fit together, what the 4% withdrawal rule does and does not say, and how to model a plan in the retirement calculator.
How Much House Can You Afford on Your Salary?
Learn how lenders size a home loan from income, debts and down payment, what PITI and PMI add to the monthly cost, and how to run your own numbers before you shop.
How Much Life Insurance Do You Need?
Estimate life insurance coverage with a needs-based DIME approach — debts, income replacement, mortgage, education and final expenses — minus savings and existing policies.
How the Power of Compound Interest Works
See how compound interest differs from simple interest, why time and contributions matter more than a flashy rate, and how to run your own projections in the compound interest calculator.
How to Budget for a Car: Payment, Fuel and Ownership Costs
Build a full car budget — loan payment and interest, fuel by MPG and mileage, plus insurance and maintenance — using the auto loan and fuel cost calculators together.
How to Compare Personal Loan Offers
Compare personal loan offers by monthly payment, total interest, origination fees, APR and term length — with a worked example using the loan calculator.
How to Fill Out a W-4 So Your Withholding Is Right
Walk through Form W-4 steps — multiple jobs, dependents, extra withholding — and how to check the result against a pay stub and the paycheck calculator.
How to Read Your Pay Stub
What each line on a typical US pay stub means — gross pay, pre-tax deductions, tax withholding, after-tax deductions and net pay — and how to check it.
Interest Rate vs. APR: What Your Loan Offer Really Costs
Understand the difference between a loan interest rate and APR, how Truth in Lending disclosures work, and how to compare two offers with different fees using the loan calculator.
Paychecks in States Without an Income Tax
See which taxes still hit paychecks in no-income-tax states, how sales and property taxes can offset the difference, and compare take-home pay with the paycheck calculator.
Should You Itemize or Take the Standard Deduction?
Decide between the 2026 standard deduction and itemizing on Schedule A — what counts, when itemizing wins, records to keep, and how to compare both in the income tax calculator.
Understanding Your Take-Home Pay
See how gross pay becomes net pay after federal withholding, FICA, state taxes and deductions, with 2026 figures and examples from the paycheck calculator.
What Inflation Does to Your Savings
Learn how the CPI measures price changes, what real versus nominal returns mean for cash and investments, and how to compare dollar amounts across years with the inflation calculator.
When Does Refinancing Your Mortgage Pay Off?
Learn how closing costs, break-even months and resetting the loan term decide whether a refinance saves money, with worked examples from the refinance calculator.