Personal finance topics
Pick a calculator when you have a number to estimate, or a guide when you want the idea behind the math. Every topic is educational—none of it is a recommendation to buy, sell, borrow, or invest.
Mortgages
- MortgagesHow Homeowners Insurance Fits Into Housing CostsSee how homeowners insurance affects the true monthly cost of owning a U.S. home, what drives premiums, and how escrow changes can surprise borrowers.Read guide
- MortgagesWhen Refinancing a Mortgage Can Make SenseLearn how to judge a U.S. mortgage refinance using rate drops, closing costs, break-even timing, term resets, and cash-out tradeoffs—with a clear worked example.Read guide
- MortgagesFixed-Rate vs Adjustable-Rate MortgagesCompare fixed-rate and adjustable-rate U.S. mortgages: payment stability, initial rates, adjustment caps, and the questions that decide which structure fits.Read guide
- MortgagesMortgage Closing Costs: What You Pay and WhyBreak down typical U.S. mortgage closing costs, what is negotiable, how estimates work, and how to plan cash so closing day is not a surprise.Read guide
- MortgagesWhat PMI Is and How It Affects Your MortgageLearn what private mortgage insurance is, why lenders require it on many low-down-payment loans, what it costs, and how borrowers typically remove it.Read guide
- MortgagesChoosing Between a 30-Year and a 15-Year MortgageCompare 30-year and 15-year fixed U.S. mortgages on payment size, total interest, rate differences, and flexibility before you lock a term.Read guide
- MortgagesHow Loan Amortization Actually WorksSee how fixed installment loans split each payment into interest and principal, why early payments feel interest-heavy, and how extras change the payoff timeline.Read guide
- MortgagesHow Much House Can You Comfortably Afford?Estimate a sustainable U.S. home budget from take-home pay, debts, down payment cash, and the full monthly housing cost—not only principal and interest.Read guide
- Mortgage CalculatorEstimate a monthly housing payment with principal, interest, taxes, insurance, and HOA.Open calculator
- Loan CalculatorProject monthly payments, total interest, and total cost for a fixed-rate installment loan.Open calculator
- Investment CalculatorIllustrate a future balance from principal, monthly contributions, and an assumed annual return.Open calculator
Credit
- CreditHow Auto Loans Are Priced and Paid OffLearn how U.S. auto loans use amount financed, APR, and term to set payments, how amortization works on a car note, and which dealer add-ons a calculator misses.Read guide
- CreditHow Student Loan Interest Accrues and Adds UpLearn how U.S. student loan interest is calculated, when unpaid interest can capitalize, and how repayment choices change total cost using labeled examples.Read guide
- CreditHow Credit Card Interest Is CalculatedLearn how U.S. credit card APR, grace periods, and average daily balances turn into monthly interest charges—with round-number examples you can follow.Read guide
- CreditDebt Snowball vs Avalanche: Choosing a Payoff OrderCompare snowball and avalanche debt payoff methods with U.S. consumer loan math, motivation tradeoffs, and a labeled multi-debt example so you can pick a plan you will finish.Read guide
- CreditAPR Explained: Reading the Yearly Cost of CreditUnderstand what annual percentage rate means on U.S. loans and cards, how it differs from the interest rate, and how to compare offers without relying on one headline number.Read guide
- CreditHow Credit Scores Are Built and UsedUnderstand what U.S. credit scores summarize, which habits tend to move them, how lenders use them, and what a score cannot tell you about your finances.Read guide
- Mortgage CalculatorEstimate a monthly housing payment with principal, interest, taxes, insurance, and HOA.Open calculator
- Loan CalculatorProject monthly payments, total interest, and total cost for a fixed-rate installment loan.Open calculator
- Compound Interest CalculatorSee how a starting balance and monthly contributions can grow when interest compounds over time.Open calculator
Investing
- InvestingHow Inflation Shrinks What Your Money BuysSee how inflation erodes purchasing power, why nominal returns can mislead, and how labeled examples help you plan long-term U.S. savings and retirement spending.Read guide
- InvestingAsset Allocation: Mixing Stocks, Bonds, and CashUnderstand what asset allocation means, how stocks, bonds, and cash play different roles, and why the mix and rebalancing usually matter more than chasing a single winner.Read guide
- InvestingDollar-Cost Averaging: Investing on a ScheduleLearn how dollar-cost averaging builds an average purchase price over time, what it does not guarantee, and a labeled example versus putting a lump sum to work at once.Read guide
- InvestingCompound Interest: Why Time and Balance MatterA plain-English walkthrough of compound interest—how balances grow when earnings stay invested, what the formula assumes, and when the same math hurts you on debt.Read guide
- Compound Interest CalculatorSee how a starting balance and monthly contributions can grow when interest compounds over time.Open calculator
- Investment CalculatorIllustrate a future balance from principal, monthly contributions, and an assumed annual return.Open calculator
- Retirement CalculatorEstimate whether today’s savings and planned contributions may reach a retirement target.Open calculator
Retirement
- RetirementRMDs: When Retirement Accounts Force WithdrawalsUnderstand U.S. required minimum distributions for traditional IRAs and 401(k)s—starting ages, how the IRS table works, taxes and penalties, and a labeled RMD example.Read guide
- RetirementChoosing Between a Roth IRA and a Traditional IRACompare Roth and Traditional IRAs on tax timing, 2026 contribution and income rules, withdrawals, and a labeled example so you can weigh the tradeoff without guessing market returns.Read guide
- RetirementHow Workplace 401(k) Plans WorkA clear overview of U.S. 401(k) plans—payroll contributions, employer match, vesting, traditional vs Roth, investments, and withdrawals—without treating market returns as guaranteed.Read guide
- RetirementFiguring Out a Retirement Savings TargetEstimate how much to save for retirement by starting with spending needs, filling the income gap, and testing contributions under realistic assumptions—not guaranteed returns.Read guide
- Compound Interest CalculatorSee how a starting balance and monthly contributions can grow when interest compounds over time.Open calculator
- Investment CalculatorIllustrate a future balance from principal, monthly contributions, and an assumed annual return.Open calculator
- Retirement CalculatorEstimate whether today’s savings and planned contributions may reach a retirement target.Open calculator
Saving
- SavingHigh-Yield Savings, Money Markets, and CDs ComparedCompare high-yield savings, money market deposit accounts, and CDs on access, rate structure, insurance, and fit—using examples rather than promised yields.Read guide
- SavingWhat APY Means on Savings AccountsLearn how annual percentage yield (APY) works on U.S. deposits, how compounding turns a nominal rate into APY, and how to compare offers without treating any yield as locked in.Read guide
- SavingSizing a Cash Emergency FundSize a U.S. emergency fund from essential monthly costs, income risk, and household setup—with a worked example and clear limits on what cash reserves can and cannot do.Read guide
- Compound Interest CalculatorSee how a starting balance and monthly contributions can grow when interest compounds over time.Open calculator
- Investment CalculatorIllustrate a future balance from principal, monthly contributions, and an assumed annual return.Open calculator
- Retirement CalculatorEstimate whether today’s savings and planned contributions may reach a retirement target.Open calculator
Budgeting
- BudgetingUsing Sinking Funds for Predictable Big BillsSet up sinking funds so irregular U.S. household costs—car insurance, holidays, repairs—are saved for on purpose instead of raiding emergency cash or credit.Read guide
- BudgetingBuilding a Monthly Budget That Matches Your CashCreate a practical U.S. monthly budget from take-home pay—covering bills, needs, wants, sinking funds, and debt—without forcing percentage rules that ignore real cash flow.Read guide
- BudgetingGross Pay and Take-Home Pay ExplainedSee how U.S. gross pay becomes net (take-home) pay through taxes, FICA, and benefits—and why budgets and housing math should start from what actually hits your account.Read guide
- Loan CalculatorProject monthly payments, total interest, and total cost for a fixed-rate installment loan.Open calculator
- Compound Interest CalculatorSee how a starting balance and monthly contributions can grow when interest compounds over time.Open calculator
- Retirement CalculatorEstimate whether today’s savings and planned contributions may reach a retirement target.Open calculator
Looking for a specific tool? See the full calculator list or all guides.