"Can I afford this?" — answered with real numbers
Almost every money mistake starts with the same fuzzy guess: I think I can afford it. This affordability calculator replaces the guess with arithmetic. Enter your monthly take-home income, your regular living expenses, and your existing debt payments, and it shows your true disposable income — the money genuinely free each month. Add a payment you are considering, and it tells you whether that commitment is low, medium or high risk before you sign anything.
How the risk score is calculated
Two things decide the rating. The first is your disposable income after the new payment: if a purchase would leave you with nothing — or a negative balance — that is a clear red flag. The second is your debt-to-income ratio (DTI), the share of your income that goes to debt payments. Lenders watch this number closely. A DTI under 36% is generally healthy; between 36% and 43% is manageable but tight; above 43% is the zone where banks hesitate to lend and budgets start to break. The calculator blends both signals so a "Low Risk" result means you have both breathing room and a safe ratio.
How much debt is too much?
People often ask how much debt is too much, and the honest answer is: it depends on your income and your fixed costs, not a single dollar figure. Someone earning $8,000 a month can comfortably carry payments that would crush someone earning $3,000. That is exactly why a ratio works better than a number. If your existing debt payments already eat more than 40% of your take-home pay, adding more is dangerous regardless of how "small" the new payment feels. The calculator makes that visible instantly, so you can see the line before you cross it.
Using affordability to protect your debt payoff
If you are working to become debt-free, the affordability check is your guardrail. Every new subscription, financed gadget or car payment competes with the extra money you could be throwing at your balances. Before adding anything, run it here: if the result is medium or high risk, that is a sign the money is better spent accelerating your payoff. Pair this tool with our credit card payoff calculator to see how much faster you would be debt-free by redirecting that same payment toward your balance instead.
Build in a buffer
One more rule of thumb: aim to keep at least 10% of your income as genuine disposable income after all commitments, and never commit your entire cushion. Life delivers surprises — a car repair, a medical bill, a slow month — and a budget with no slack turns a small shock into new debt. When the calculator shows a comfortable margin, you have room to absorb those surprises without reaching for a credit card.