Most writing about business mobiles assumes you have fifty staff and a procurement process. If there are three of you, or one of you, the advice stops being relevant fast. Here is the honest version for small teams: what actually changes, what genuinely does not matter at your size, and the one thing worth sorting even if you change nothing else.
The short version
- There is no minimum. A sole trader can hold a business account with one SIM.
- The saving is rarely the headline rate. It is reclaimable VAT and not paying for allowances nobody uses.
- The number is the thing that matters most, and it is the one most small businesses get wrong.
- Pooled data is worth it from about three lines upward, not twenty.
- You will not get the rates a hundred-line account gets, and anyone promising otherwise is guessing.
On this page
Is it even worth it at this size?
Usually yes, but not for the reason people expect. The monthly rate on a small business account is not dramatically better than a good consumer deal, and anyone telling you otherwise is selling.
What changes is everything around the rate:
- VAT is reclaimable where you are VAT registered. On a personal contract reimbursed through expenses, that is far messier and often simply lost.
- It is a clean business expense, one bill, no picking through a personal statement each month separating work calls from a family streaming subscription.
- Someone other than the handset's owner can deal with it. At three people that sounds trivial until one of them is on holiday with a broken phone.
- The numbers belong to the business, which is the big one. More on that below.
If you are a sole trader with one phone and no plans to hire, the honest answer is that the gain is modest: VAT, tidier books, and the number sitting in the business name. That may be enough. It may not be. We will tell you which rather than pretend.
The number problem
This is the part that costs small businesses real money, and it is almost always discovered too late.
If a line is in an employee's own name, that number is theirs. Not the company's. When they leave, it goes with them, and so does every customer, supplier and supplier's engineer who has it saved. You cannot port a number out of someone else's personal account without their cooperation, and a resignation is precisely when cooperation is least likely.
The small business version of this is worse, because in a team of four the person who leaves is often the one who did all the customer-facing work, and their mobile is the number on the website, the van and two years of invoices. We have seen businesses effectively hand a customer list to a departing employee without realising it was happening.
It is fixable, and it is much easier to fix now than during a resignation. Numbers in personal names can usually be transferred to a business account with the person's agreement. Our guide to who owns the number when an employee leaves covers the detail, and keeping your number when switching explains the porting side.
Pooled data with three people
Pooling is written about as a large-account feature. It is not. It earns its keep the moment usage varies across your team, and usage varies across every team.
With three people, one of whom tethers a laptop on site while the other two mostly sit on Wi-Fi, individual bundles guarantee you overpay at both ends: the site worker tips into overage while two allowances go largely untouched. One shared pot absorbs that automatically.
Our explainer on pooled and aggregated data covers how it works, and there is a calculator on our SIM only page you can put your own numbers into.
Handsets, and when to stop buying them
Small businesses buy new phones more often than they need to, usually because the contract bundled one in and it felt free.
It is not free. The handset is finance, and it is normally the largest part of a monthly line rental. Two things follow:
- If the phones you have still work, go SIM only. The monthly cost drops and the commitment shortens from 24 or 36 months to as little as 30 days.
- Check what happens at the end of your term. On many contracts the price simply continues after the handset is paid off. Three years on the same tariff with the same phone usually means you have bought it twice.
Our post on the SIM only versus handset maths works it through properly.
What you will not get
Worth being straight about, because the opposite is promised constantly.
- You will not get the rates a two hundred line account gets. Below roughly twenty lines you are choosing from published tariffs rather than negotiating. That is not a failing of your supplier, it is how the market is built.
- You will not need most of what is sold to larger accounts. Device management, spend policies and reporting matter at a hundred handsets. At four, they are overhead.
- You will not benefit from switching constantly. The gains at this size come from being on the right shape of contract, not from moving every year.
If you grow, the picture changes, and our guide to what changes at 20, 50 and 100 lines covers where.
Three lines or thirty, send us a bill
We will tell you whether a business account is actually worth it at your size, what you are paying for that nobody uses, and whose name your numbers are in. If you are better off leaving things alone, we will say so.