By Compare The Networks editorial team. Published 2026-10-06. Content reviewed 2026-10-06.

Business Phone Contract or SIM Only: Compare Costs

A handset contract and a phone bought separately can both make sense for a business. Compare the full payment commitment, the condition of your current phones and the practical cost of keeping staff working.

The cheapest-looking monthly payment is an incomplete answer. A SIM-only plan assumes you have a suitable phone. A bundled handset proposal needs checking for initial payments, separate finance and what happens when the phone needs replacing.

Start with the phones you already have

List each handset's age, condition and business role. Ask whether it still runs the required apps, lasts through the working day and has an acceptable remaining support period. Check support information for the exact model with its manufacturer.

A reliable existing phone is a strong reason to consider SIM only. A phone that repeatedly needs charging during customer visits may be a weak foundation for a new airtime commitment. Make that judgement before asking for prices.

Put the two routes on the same timeline

For the handset route, record the initial payment, every recurring charge and any separate device commitment. For the separate-phone route, record the purchase cost, airtime payments and any financing used to buy the device.

Use the same comparison period and VAT basis. If the proposals have different minimum terms, show the whole commitment for each as well as the cost over the common period. Do not hide a remaining balance because it falls outside the comparison window.

The table is a decision aid rather than a claim that one route wins for every company.

Keep finance and airtime distinct

Ask whether the phone is bought, financed or supplied under another arrangement. Find out when ownership transfers and whether the device balance continues if the airtime changes. Read the individual agreements together.

If spreading the payment helps cash flow, compare the total payable as well as the monthly instalment. Ask your accountant how the proposed purchase and payment arrangements fit the business. The label “business contract” does not resolve an accounting question by itself.

Check the replacement plan

A phone is working equipment. Decide what happens if someone drops it, loses it or discovers a fault. Check the actual warranty, insurance or repair service proposed, including any exclusions and the process for obtaining a replacement.

For a field team, a spare compatible phone may be useful. For office staff, a shared temporary handset may be adequate. Price the arrangement you intend to use instead of assuming a premium phone contract removes every repair problem.

Compare features that matter to the role

Write down the must-have applications, storage needs and physical working conditions. Check that the exact device meets those requirements. Avoid buying a top-end model for everyone when some roles need a simpler phone and others need a specialist device.

For a mixed fleet, ask for separate options for staff keeping their phones and staff needing replacements. This avoids paying for devices the business does not yet need.

Make the decision from the whole picture

SIM only can be a sensible option when the existing fleet is in good condition and the business can handle replacements. A handset package may suit a planned refresh when the written payment and support terms fit the company's needs.

CTN business mobile contracts have a minimum term of 24 months. Use the quote checklist to compare the exact commitment, then request handset and SIM-only alternatives against the same line list.