The sticker price isn't the question. The question is what the monthly obligation does to the tightest week of your typical month. A $40,000 machine and a $1,200 monthly lease are not big and small versions of the same decision, they're different shapes of cash leaving at different speeds, and your bank account's rhythm decides which shape you can carry.
Find your tight week first
Every business has one: the stretch where payroll clears before customer payments land and the balance dips to its monthly low. This is the same tight-week test I use for hiring decisions. Look at your last six months of bank statements and find that recurring low point. That number, not your average balance and definitely not your best-day balance, is what any new obligation has to live with. A payment your average month absorbs easily can be the payment that makes your tight week terrifying.
The test
Take the full monthly cost of the purchase: the payment plus insurance, maintenance, and any operating costs it brings, including one-time items like installation and training, and any downtime while it's set up. Subtract it from your recurring monthly low point, as if it had existed for each of the last six months. If the low point stays comfortably positive in every one of those months, the obligation fits your rhythm. If even one month goes negative, the honest answer is not yet, or not at this price, or not without changing something else first. (That's a conservative rule of thumb I use, not a universal standard, but it keeps you out of trouble.)
Is it better to buy or lease equipment?
Neither is automatically smarter. When you buy, you spend a large amount of cash now and have no payment later. When you lease, you keep your cash now and take on a monthly payment, usually costing more in total over time.
If your cash cushion is thin, the lease's gentler monthly shape can be worth its higher total cost, because surviving the year matters more than optimizing it. If cash is strong and the equipment has a long useful life, buying often wins. The tax treatment differs too, Section 179 and depreciation for a purchase versus deducting lease payments, and that part belongs to your CPA before you sign anything.
The mistake to avoid
Deciding from the annual number. "$14,400 a year" sounds abstract and manageable. "$1,200 leaving on the 5th of every month, including the month your biggest client pays late" is the actual commitment. Obligations are experienced monthly, so evaluate them monthly.
Buy vs. lease checklist
- What does the full monthly cost do to my tightest week?
- How thin or thick is my cash cushion right now?
- How long is the equipment's useful life?
- Have I counted installation, training, insurance, and maintenance, not just the payment?
- What does my CPA say about the tax treatment of each option?