How long does a business phone contract run?
Five of the 37 providers here publish a contract length on their pricing page: four at twelve months and one at thirty-six (checked 2026-08-21). The other thirty-two say nothing about a term at all.
A term is not the same thing as a billing basis, and the provider with the longest term in this dataset gives the smallest discount for accepting it.
There are two separate commitments hiding behind a per-seat price, and pricing pages are much better at printing one than the other.
The first is the billing basis: whether the figure on the card is what you pay each month or the reduced rate you get for paying twelve months at once. That one is at least visible, usually in small type under a toggle, and it is the subject of a separate page here.
The second is the term: how long the provider can hold you to the arrangement. It is the commitment that costs you money if you are wrong about the provider, and it is the one almost nobody publishes.
The five providers that publish a term
Five of the 37 print a contract length where a buyer can see it before contacting sales. Here they are in full.
| Provider | Plans with a term | Term | Market |
|---|---|---|---|
| JustCall | Team, Pro, Pro Plus | 12 months | US |
| Microsoft Teams Phone | All four Teams Phone plans | 12 months | US |
| Nextiva | Core, Engage | 12 months | US |
| Vonage Business Communications | Mobile, Premium, Advanced | 12 months | US |
| net2phone | UNITE Essentials, Professional, Ultimate | 36 months | US |
That is 15 plan rows out of the 78 in this dataset. The remaining 63 rows belong to providers who publish a price and no term, or who publish neither.
Does a longer term buy a bigger discount?
No, not here. net2phone asks for thirty-six months and prints $28.99 a seat on monthly billing against $27.99 on annual, a gap of 1.04x. Nextiva asks for twelve and prints $23.00 against $15.00, a gap of 1.53x. Vonage asks for twelve and prints 1.43x. JustCall asks for twelve and prints 1.34x.
The provider asking for three times the commitment gives roughly a thirtieth of the discount the others give. That is not an accusation of bad faith. net2phone's monthly and annual rates are close together because its list price is already high relative to the market, and a three-year agreement is normal in the part of the market that sells hardware alongside the service. It is still worth seeing plainly, because the intuition most buyers carry into a pricing page is that a longer commitment is what you trade for a lower number, and on this dataset it is not.
Why is the UK column empty?
Not one of the 14 UK providers here publishes a contract length, which is the opposite of what the UK market is known for. Multi-year agreements on business telephony are ordinary in the United Kingdom, and several of the UK providers in this dataset are exactly the type that sells them: 4Com, Babble, BT Cloud Voice and 8x8 all ask you to contact sales rather than publishing a price, so the term arrives with the quote and never appears on a page we can read.
The absence in the table is a fact about publication, not about practice. This site records what providers publish, and keeps that separate from what we could not read and from what does not exist. On contract length, the UK side of this dataset is silent, and the honest reading is that we do not know.
What thirty-six months does to a three-year comparison
Every effective cost on this site is computed over 36 months, because that is roughly how long a phone system stays in place once the numbers have been ported and the handsets are on desks. For a twelve-month provider that horizon contains two moments where you can leave without paying to leave. For net2phone it contains none.
At ten seats on UNITE Essentials, the annual rate of $27.99 gives:
The same $10,076.40 spread across a twelve-month agreement is the same money with two exits in it. Whether that difference is worth anything depends entirely on how confident you are, at the point of signing, that you have chosen correctly. You can put your own seat count into the calculator and see the three-year figure for any plan here.
Where this argument is weak
A published term is a floor, not the whole agreement. A provider that prints "12 months" may also offer month-to-month at a higher rate, may waive the term for a small account, or may hold you to an auto-renewal term that is longer than the initial one. None of that is on a pricing page, and none of it is in this dataset.
The five providers above may also simply be the more transparent ones rather than the more demanding ones. A provider that publishes a twelve-month term is telling you something true about itself; the thirty-two that publish nothing may have shorter terms, longer terms, or no term at all. Reading silence as "no contract" would be the same mistake as reading a blank price cell as "free".
Who this is not for
If you are buying fewer than three seats and intend to pay monthly, the term is unlikely to be the thing that decides your bill, and what is not in the published price will matter more. If you are buying at fifty seats or above, you will be signing a negotiated agreement whose term is one of the things you negotiate, and a published figure tells you very little about where that lands.
What to ask before you sign
If the provider publishes a term, ask what happens at the end of it: whether the agreement renews automatically, at what rate, and how much notice cancels it.
If the provider publishes no term, ask for the number in writing before you port a number to them. Porting is the point after which leaving stops being free, and it is described on the page about what sits outside the seat price.
If you are comparing a twelve-month provider against a thirty-six-month one, compare them at three years rather than at one, which is what the tables on the full list already do, and then decide separately whether the exits are worth anything to you.
Questions people ask
Is a contract length the same as annual billing? No. Annual billing is how often you are invoiced, and it usually comes with a discount. A term is how long you are held. A provider can offer annual billing with no term, and can hold you for three years while invoicing monthly. net2phone is the closest example here of the second shape.
Why do so few providers publish it? Because a term is a concession the buyer makes, and pricing pages are written to show what the buyer receives. It is the same reason taxes and regulatory fees are absent, which is covered in the page on fee disclosure.
Does a longer term ever help? Yes, when it is the price of something you would otherwise pay for separately, such as handsets included at no upfront cost. That trade can be worth taking. It is worth taking knowingly, with the hardware priced, rather than as the default that arrived in the contract.
Sources
- JustCall pricing,
https://justcall.io/pricing/. Checked 2026-08-21. - Microsoft Teams business options comparison,
https://www.microsoft.com/en-us/microsoft-teams/compare-microsoft-teams-business-options. Checked 2026-08-21. - Nextiva pricing,
https://www.nextiva.com/pricing. Checked 2026-08-21. - Vonage Business Communications pricing,
https://www.vonage.com/unified-communications/pricing/. Checked 2026-08-21. - net2phone pricing,
https://www.net2phone.com/pricing. Checked 2026-08-21. - The counts of providers and plans by contract length are computed from data.json, which records the source URL and check date for every row. How the ordering and the three-year horizon are produced is set out in the method page.
Written by Kaz (pen name). Figures are copied from providers' published pricing pages on the dates shown. We have not used these products. Corrections: contact form.