How to build an IT budget for the year ahead

An IT budget should help you avoid surprise bills, not become a finance exercise that nobody uses. This guide is for a small business owner or manager planning the next twelve months. It gives you a straightforward way to list the predictable costs, plan replacements before failure and leave room for the things no one can schedule.

Start with a simple baseline

Pull together the last year of IT invoices, bank payments and renewal emails. Include support, Microsoft 365, internet, mobile contracts, phone systems, backup, security products, domain names, website hosting, printers and any software staff have expensed themselves. Put them in one spreadsheet with supplier, renewal date, monthly or annual cost, number of users and the person responsible.

Do not assume the finance system tells the whole story. Ask department leads what software they use and ask staff which subscriptions appear on company cards. It is common to find two tools doing the same job, licences for former staff or a free trial that has quietly become a paid service. Aim for a usable list, not a perfect audit.

Separate recurring costs from one-off projects

Recurring costs are the services that keep working every month or year: support, licences, broadband, backup storage and security monitoring. One-off costs are items such as a laptop refresh, office cabling, migration work or replacing a failed firewall. Keeping these columns apart shows what your normal running cost is and what requires a decision or cash reserve.

As a rough UK guide, basic business laptop replacement can range from about £500 to £1,200 per person before setup and accessories, depending on the role. A small office network refresh might range from hundreds to several thousand pounds depending on cabling, building size and connection needs. These are planning ranges only, not a price list. Get a scope for your own site before approving a figure.

Build a hardware refresh cycle

Step 1: make an equipment register

List laptops, desktops, monitors, servers, network equipment, phones and key peripherals. Record purchase date, warranty end date, condition, user, operating system and any known fault. This makes it easier to see a group of machines approaching the same age rather than discovering it when several fail in the same month.

Use a planned cycle that fits each type of kit. Many small businesses budget to replace standard laptops over roughly three to five years, but the right point depends on reliability, warranty, battery health and what the role needs. Network switches and firewalls may have a different cycle, driven by support status and security updates. Do not replace working equipment solely because a calendar says so, but do not wait until every fault is urgent.

Step 2: spread the cost

Group equipment into quarters or years and plan replacements in batches that your cash flow can handle. Keep a few spare, configured devices if a failed laptop would stop a key person working. For a growing team, add expected starters to the forecast rather than buying in a panic. Include accessories, setup and secure disposal, not just the laptop price.

Control licence and subscription creep

Every subscription should have an owner, renewal date and reason. Compare active licences with the current staff list monthly or quarterly. Reclaim licences when people leave, and check whether a shared mailbox, room account or service account needs a paid licence. Be careful: removing a licence without a plan can affect retention, archives or data access.

Check Microsoft 365 plans against what people actually use. Buying the highest tier for everyone can waste money; choosing a basic plan where stronger identity or device controls are needed can shift cost into risk and manual work. Our Microsoft 365 plans comparison is a starting point for those conversations. Record price rises and contract end dates so they are not surprises.

Give security and backup their own budget lines

Security is not the money left after hardware and software. Budget separately for MFA, endpoint protection, staff awareness, patching, password management and incident help. The mix depends on your data and customer requirements; our cyber security support information can help you set priorities. If Cyber Essentials matters for tenders or supply chains, allow for preparation and changes found during the work.

Backup also needs its own line. Include Microsoft 365 data, file servers, important cloud applications and the time to test a restore. Cheap storage is not the same as a plan that gets you back to work. Read our business data backup guide before deciding what to protect and how long you need to keep it. As a rough guide, very small-business backup services can begin at a few pounds per user or device per month, but storage volume, retention and systems covered change the cost.

Keep contingency without hiding poor planning

Set aside a contingency for failures, urgent security work, a new starter, a damaged device or a project that reveals extra cabling. The amount depends on your cash flow and reliance on technology. A sensible start is whether 5—15% of planned IT spend would cover realistic unknowns in your business. This is a planning range, not a rule.

Sanity-check every significant quote

Ask what is included, what is excluded, who owns any licences, whether VAT is included, the likely ongoing cost and what happens after installation. Compare the scope, not just the total. A quote for WiFi may exclude cabling; a migration quote may exclude old data cleanup; a support quote may exclude projects. Ask for assumptions in writing and make sure the equipment is suitable for the environment.

For a larger purchase, get a second view or ask the supplier to explain it in plain English. You do not need to buy the cheapest option, and you do not always need to replace everything. If a system is stable, supported and meets the need, spend elsewhere. For an independent discussion of priorities, look at ongoing IT support and ask for the risks to be ranked, not merely listed.

What to do next

Build the baseline list this week, then schedule a short annual review before contracts renew. Put hardware, security, backup and contingency into separate lines. TSS can offer a free, no-obligation chat to help businesses in Bury, Greater Manchester and Lancashire turn a pile of invoices into a practical plan.