This vs that: settle the classic money debates

Every big money question is really a choice between two paths. These head-to-head tools run both paths with your numbers — same assumptions, same time horizon — and tell you which one leaves you better off, and by how much.

Housing

🏡 Rent vs Buy a Home Calculator Is renting really throwing money away — or is buying the costlier path in your city? 🏦 15 vs 30 Year Mortgage Calculator Guaranteed interest savings vs investing the payment difference — which builds more wealth? ⚖️ ARM vs Fixed Mortgage Calculator Take the ARM discount or lock for 30 years — priced over the years you'll really stay? 📍 Mortgage Points Calculator Pay points up front for a lower rate, or keep the cash — when do you break even? 🔄 Mortgage Refinance Calculator Does refinancing actually save money after closing costs, and how soon? 🗓️ Biweekly Mortgage Calculator Biweekly payments vs monthly — how much time and interest do they really cut?

Cars

🚗 Lease vs Buy a Car Calculator Lease payments vs ownership costs minus resale value — which is cheaper over your horizon? 🚗 Auto Loan Calculator What does the loan really cost once trade-in, tax rules and fees are included?

Debt vs investing

⚖️ Pay Off Debt vs Invest Calculator Extra money each month: kill the debt first, or invest and pay the minimum? 🧊 Debt Avalanche vs Snowball Calculator Smallest-balance-first motivation vs highest-rate-first math — what does each cost? 💳 Balance Transfer Calculator Move the balance to a 0% card and pay the fee, or stay put — which costs less? 🎓 Student Loan Refinance Calculator Refinance student debt for the lower rate, or keep the federal protections? ⚖️ Loan Comparison Calculator Two loan offers, different rates and fees — which is genuinely cheaper? 🧮 Debt Consolidation Calculator Keep juggling separate debts, or roll them into one loan — what changes?

Retirement

⚖️ Roth vs Traditional 401(k) Calculator Pay tax now (Roth) or later (traditional) — which leaves more spendable income? 🔄 Roth Conversion Calculator Convert IRA money at today's tax rate, or let it ride and pay at withdrawal? 🏛 Social Security Break-Even Calculator Claim at 62, full retirement age or 70 — where's the break-even for each? 🏛️ Pension Lump Sum vs Annuity Calculator Take the buyout or keep the monthly checks — what return would the lump have to earn?

Taxes & self-employment

🧾 Tax Withholding Calculator Refund or bill next April — and which W-4 line fixes it before year-end? 🗓️ Quarterly Estimated Tax Calculator Safe harbor on last year's tax vs 90% of this year — which schedule costs less? 🧰 Solo 401(k) vs SEP IRA Calculator Solo 401(k) or SEP IRA — which shelters more of your self-employment profit? 💰 Bonus Tax Calculator The flat 22% withholding vs your real bracket — money back or more to pay? 🎁 Donation Bunching Calculator Give the same every year, or bunch two years into one — which deducts more?

Career & family

🤝 Job Offer Comparison Calculator Two offers priced on salary, match, PTO, insurance and commute — which really pays more? 👶 Daycare vs Staying Home Calculator Second income minus childcare, taxes and work costs — what does the job really net? 🧠 College ROI Calculator Degree cost plus foregone wages vs the earnings premium — when does it break even? 📈 Pay Raise Calculator What a raise changes after taxes — and what it's worth over the years ahead?

How to use these fairly

Two rules make either/or comparisons honest. First, hold total cash committed equal — if one path costs less per month, the fair comparison invests the difference rather than quietly spending it. Second, compare at the same end date — a 15-year mortgage vs a 30-year only makes sense measured over the same 30 years. Every tool above follows both rules, and each page explains the assumptions and the math it uses, so you can disagree with an input and change it.