Saving & banking tools

Free calculators for saving smarter — high-yield vs big-bank, CD ladders, emergency funds, budgets, and how long to reach a goal.

22 resources

Calculator 50/30/20 Budget Allocator Apply the 50/30/20 rule to your real take-home pay and see exactly where you are over or under in each bucket. Open → Calculator Car: Save Up vs Finance — True Cost Comparison Compare the total cost of paying cash for a car (after saving) against financing it now, including all interest. Open → Calculator Cash Drag Cost Calculator See the exact annual opportunity cost of leaving idle money in a low-yield checking account instead of a HYSA. Open → Calculator CD Ladder Builder See how a CD ladder locks in today's rates while keeping money accessible every few months — vs a single CD or HYSA. Open → Calculator Debt vs Save Decision Engine A/B verdict: does your extra money earn more paying off debt (guaranteed) or investing in the market (expected)? Open → Calculator Emergency Fund Builder Find your exact emergency fund target and how many months it takes to build it at your current savings rate. Open → Calculator House Down Payment Timeline Exactly when can you buy — given your income, current savings, and target home price — with or without PMI. Open → Calculator HYSA vs Money Market Breakeven Find the exact balance at which a money market account's higher APY overcomes its minimum balance fee. Open → Calculator Inflation Cash Erosion Calculator See how much buying power your idle cash loses each year when inflation outpaces your savings account rate. Open → Calculator No-Spend Challenge Compounder Turn a 30-day no-spend challenge into a long-term wealth number by investing the savings. Open → Calculator Pay Yourself First Projector Quantify the compounded wealth difference between automating savings before bills vs saving whatever is left over. Open → Calculator Round-Up Savings Engine See how investing your daily transaction round-ups compounds into meaningful wealth over time. Open → Calculator Save vs Invest Threshold Calculator Know exactly when your emergency fund is large enough that your next dollar should go to investing, not saving. Open → Calculator Savings Account Fee Drain Calculate the real net yield of a savings account after monthly fees — which is sometimes negative. Open → Calculator Savings Goal Timeline How long to reach any savings goal — vacation, wedding, college — with HYSA compounding, and the monthly amount required. Open → Calculator Savings Rate Wealth Accelerator See how raising your savings rate by just a few percentage points shaves years off your financial goals. Open → Calculator Sinking Fund Planner Set up to three savings goals and get one combined monthly contribution that funds each on time. Open → Calculator The True Cost of Your Subscriptions See what your recurring subscriptions cost over time — and what canceling and investing even a few would become. Open → Calculator Windfall Allocation Engine Got a bonus or tax refund? Get the optimal split: emergency fund first, then debt, then investing. Open → Guide How Big Should My Emergency Fund Really Be? (Not the Generic 3-6 Months) The real size of your emergency fund depends on your income stability, fixed costs and dependents — here is how to size it to a dollar figure instead of a vague rule of thumb. Open → Guide Save or Pay Off Debt First? A Clear Decision Framework A step-by-step framework for deciding whether to save or pay down debt first, using the interest-rate spread, guaranteed returns and a starter buffer instead of guesswork. Open → Guide Why Keeping Cash in Checking Is Quietly Costing You Money Idle cash in a 0.01% checking account loses ground to inflation and forfeits hundreds in interest a year — here is how to measure the drag and fix it without losing liquidity. Open →