
In January, Karen felt good about the budget.
She runs the office at a twenty two person dental practice in Salem. The technology line was approved, the spreadsheet was clean, and she had twelve months before anyone would ask her about it again.
By July, four laptops had died, two new hygienists had pushed the cloud storage into the next tier, and every software renewal came in higher than the year before. Nothing new had been added. The number was simply wrong.
Then the question every office manager dreads: "Why didn't we know about this?"
The honest answer is usually uncomfortable. You did know. Or you could have, months before the invoice.
Most technology surprises are not surprises. They are predictable expenses that nobody wrote down. Here are the four budgeting mistakes that turn foreseeable costs into July emergencies, and what to do about each one before you finalize next year's number.
Last year is a rearview mirror, not a road map

The easiest way to build an IT budget is to take last year's spend and carry it forward. It is also the most reliable way to get the number wrong.
Last year's spending tells you what the business needed twelve months ago. It says nothing about the three machines that will cross their fifth birthday in March, the renewal that resets in August, or the two people you plan to hire in the spring.
A useful budget starts with where the business is today and what it will need in the months ahead. Before you finalize a total, look at aging equipment, upcoming renewals, staffing plans and anything the leadership team has already decided to do. Then build the number around what is coming, not what already happened.
If you work with a managed IT provider, ask them for that list. They should already have it.
How far ahead should a business plan its IT budget?
Plan the budget for 12 months, with a rough view out to three years for equipment. Most hardware has a known useful life, and most software contracts have a known renewal date. A one-year budget that ignores year two turns a planned replacement into an unplanned one.
"It still works" is not a replacement strategy
Every office has the one computer. It is loud. The battery lasts twenty minutes. Opening a spreadsheet is an act of faith.
And the person who uses it has built their whole workday around its moods. They know which programs to open first and which to never open at the same time. They keep it plugged in. They have a workaround for everything.
Microsoft Learn, Windows lifecycle and end of support dates
"It still works" is a very low bar for a tool someone depends on eight hours a day. When that machine finally quits, a planned purchase becomes a same-day scramble, and same-day scramble is never cheap. You pay for the rush, you pay for the lost hours, and you pay again when the replacement arrives without the software and settings the old one had.
How often should business computers be replaced?
Plan on four to five years for desktops and laptops, sooner for machines that run demanding software or that have already needed repair. Age matters less than support. Once the manufacturer and Microsoft stop supporting the hardware or operating system, the machine stops getting security updates, and keeping it on the network becomes a risk rather than a savings. A replacement schedule turns this into a line item instead of a surprise.
Renewals on autopilot
Auto renewal is baked into nearly every subscription a business carries. It saves you from tracking due dates. It also means a subscription keeps billing long after no one uses it.
A cloud storage account for someone who left two years ago. A design tool one person tried once. A second video conferencing platform nobody can explain. None of them are large on their own. Together they are a line in the budget that produces nothing.
Put every renewal on a calendar with a reminder thirty days ahead. When the reminder fires, ask two questions: who is using this, and is it still worth what we pay? If nobody can answer the first question, you already have the answer to the second.
How do you find unused software subscriptions?
Start with the credit card and bank statements for the last twelve months and list every recurring technology charge. Then match each one to a named person who uses it. Anything without a name is a candidate to cancel. Your IT provider can usually pull a license list from Microsoft 365 and other admin consoles showing who has logged in recently, which makes matching quick.
Your growth plan and your IT plan have never met
In December, most businesses plan the year in two separate conversations. Leadership decides headcount, locations and new services in one. IT gets asked what it needs in another, usually later, and nobody in that second conversation knows what was decided in the first.
New hires need accounts, licenses and equipment. A second location needs internet, Wi-Fi, phones and a way to reach the company's systems. A move to hybrid work changes what laptops you buy and what security you need.
FTC, Cybersecurity for Small Business
Each of those decisions carries a technology cost, and if the two conversations happen separately, the costs meet on an invoice when you least expect it.
Bring the two together. When the people responsible for technology planning know where the company intends to go, they can tell you what it will take to get there before the money is committed, not after.
Should IT be part of annual business planning?
Yes, in the same meeting, not a separate one. Every growth decision a leadership team makes has a technology consequence: headcount, locations, new services, remote work. When IT is in the room, those consequences get priced in advance. When IT hears about them afterward, they get priced at rush rates.
A good IT budget has no surprises
Technology cannot be made perfectly predictable. A drive fails, a vendor changes terms, a tool you counted on gets discontinued. The goal is not a budget that never moves. The goal is a budget that gives you the fewest possible chances to say, "I didn't see that one coming."
Replacements, renewals, security needs and growth costs are all visible months in advance if someone is looking. The question for most businesses is whether anyone is.
What should an IT budget include?
Five categories cover most of it: hardware replacement on a schedule, software and subscription renewals with dates, security tools and training, support (whether in house, outsourced, or both), and a line for the growth the business has already planned. A sixth line for the unexpected is reasonable. If any category is missing, that is where next year's surprise is hiding.
10D Tech provides managed IT services and cybersecurity for businesses with 10 to 250 employees across Oregon and southwest Washington, from Portland and Salem through Albany, Corvallis and Eugene to Bend. The work with healthcare practices, CPA firms, law firms and manufacturers starts the same way every time: an honest look at what is coming and what it will cost.
If you would rather know what is coming before it shows up on an invoice, start with a number, a score that shows what IT, Cybersecurity and AI guardrails you can change and improve on. A complimentary Technology Confidence Score call gives you a clear picture of where your systems stand today, along with your score out of 100. See how the Score works at 10dtech.com/aspirin, then schedule at 10dtech.com/Tech_Confidence_Score. Albany, Corvallis, Eugene, Bend areas: 541-243-4103. Portland, Salem areas: 971-915-9103.




