FREE LARGE EXPENSE CALCULATOR
What would this purchase leave you with?
Check the effect of a one-time cost on your cash, reserve target and savings runway before you decide.
US · USD · No signup · Private by default · Optional device draft
Draft settingsWho is this budget for?
Use cash, income and spending for the same people.
Can I afford a big purchase?
Start with available cash minus the full one-time cost. A positive remainder means the cash covers this payment; then compare the remainder with your chosen reserve and ongoing budget.
A purchase that fits cash but reduces your buffer
With $8,000 cash and a $3,000 cost, $5,000 remains. A 3-month target at $2,000 of necessary expenses is $6,000, leaving a $1,000 reserve gap. At $2,500 total monthly spending, no-income runway falls from 3.2 to 2 months.
Large expense FAQ
One payment can affect several different financial limits.
How can I tell if I can afford a big purchase?
Compare the cost with available cash, then check what remains against your reserve target and regular spending. This tool reports those separate amounts. It does not make the purchasing decision for you or check the dates of upcoming bills.
What counts as a one-time expense?
Enter an additional cash cost paid now, such as a repair, appliance or moving expense. Include applicable taxes, delivery or setup costs in your total. Do not count a cost already paid out of your current cash balance again.
Can I use this for moving costs?
You can test a one-time moving budget. Ongoing rent, utilities, commuting and income changes are not automatically included. Compare those separately before deciding whether a move improves your finances.
What if the cost is more than my savings?
The result shows the immediate funding gap. It does not assume a loan, a credit card or installment payments, and it does not show a negative savings runway.
Why can a purchase fit my cash balance but still leave a reserve gap?
Cash sufficient to pay the bill and cash sufficient to preserve your preferred reserve are different thresholds. For example, $8,000 cash minus a $3,000 purchase leaves $5,000. Against a $6,000 reserve target, that leaves a $1,000 gap.
What happens if I already spend more than I earn?
The purchase does not fix that monthly shortfall. Your remaining cash may still be drawn down by regular spending. The result keeps that warning separate from the one-time payment and your chosen reserve.
Does this include financing, medical emergencies or insurance?
No. This version models an immediate cash payment only. It does not calculate interest, monthly installments, insurance benefits or lost work income. A medical bill can be entered as a known one-time cash cost, but coverage and illness costs are not predicted.
Will testing a purchase reduce the savings shown in my other tools?
No. The purchase is a scenario. Your original available cash is retained across tools. If a purchase actually happens, update your real budget yourself, and avoid counting the same payment again.
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