Should you get a new phone on a contract? Or does buying your handset and airtime separately result in a better deal?

In this article, we discuss the pros and cons and look at some of the reasons why you’d choose one route instead of the other.

Why choose a pay-as-you-go SIM?

• Cheaper monthly cost

This is arguably the biggest advantage of a pay-as-you-go SIM.

SIM-only plans allow you to keep your current phone. You can still get the benefit of a bundle of calls, texts and minutes for a single monthly rate. But the price is significantly cheaper than a phone contract, because it doesn’t include the cost of a new phone.

• No overpayments

Even though the monthly rate on a phone contract covers your usage and the cost of the handset, the payment isn’t usually split. Consequently, if you carry on with your contract after the term expires, you’re essentially continuing to make payments on a handset you’ve already paid for in full.

This can’t happen on a pay-as-you-go SIM, because you only pay for airtime.

• Greater flexibility

The difference in phone contract plans is usually in the size of your monthly allowance. The basic terms are typically all the same: a 24-month commitment with an early termination fee if you cut the contract short.

By contrast, pay-as-you-go SIMs have a choice of different terms, which makes them more flexible. You can commit to a 12-month plan, a 30-day rolling plan or just pay for what you use.

• More freedom

If you want to switch network providers it's usually easier and much quicker on a pay-as-you-go SIM, especially if you’re on a 30-day rolling plan or on just pay-as-you-go.

If you’re on a phone contract, you can switch before the 24-month term ends, but you’ll usually have to settle an early termination charge first. Besides, phones on contract are usually network locked, which means you’ll need to unlock your phone or buy a new, unlocked handset in order to switch.

Why choose a phone contract?

• A brand new smartphone, at no upfront cost

When you take out a contract phone, you’ll get a brand spanking new phone. You’re usually also entitled to free repairs or replacement if something goes wrong with it within your warranty period.

• You want an upgrade

When your contract is about to end, you have the option of upgrading to a new handset. This means you could potentially change to the latest, brand new handset every two years at no upfront cost.

• No need to top up

Phone contracts come with a monthly allowance of calls, texts and data. And anything outside the bundle is charged at a set rate and billed on your next statement. This means you don’t have to worry about monitoring your credit and topping up.

Of course, the flipside is that you may be in for an expensive shock if you’re not careful with your usage.

Phone contract vs SIM-only vs pay-as-you-go: at a glance

There are three products here, not two, and the difference between the last two is where most people go wrong. SIM-only means you pay a fixed monthly fee for an allowance of calls, texts and data, on either a 12-month term or a 30-day rolling basis - you're billed whether you use it or not. True pay-as-you-go means you buy credit in advance and it's drawn down as you use it, with nothing to pay in a month you don't use the phone. Both let you keep your existing handset, but only one of them is genuinely a no-commitment product.

SIM-only is not cheaper than a contract like for like - it's cheaper because it excludes the handset. Once you add the cost of buying a phone, the gap narrows, which is why the total-cost comparison matters more than the headline monthly figure.

Does a phone contract affect your credit score and report?

Usually. Many pay-monthly handset plans involve a credit check and may be reported to the credit reference agencies - check the provider's terms. If it is reported, it will typically appear on your credit file for the length of the term and for six years afterwards. When a network gives you a handset worth several hundred pounds and lets you pay it back in monthly instalments, it is lending you money - so it will typically report the account, your balance and your payment history to the credit reference agencies in the same way a lender would for a loan or a credit card.

Why a pay-monthly contract counts as a credit agreement

The handset is the borrowing. You take the phone away on day one, then repay its value across 24 months alongside your calls, texts and data. Because the network is exposed to the risk that you stop paying, it runs a credit check before approving you - weighing your score alongside other factors such as your income, existing borrowing and whether the repayments are affordable - and it keeps the credit reference agencies updated every month on whether you paid on time. That entry sits on your report as an active credit account, contributing to your total borrowing and your overall credit utilisation picture.

Which plans need a credit check?

A handset contract typically needs a full credit check with a hard search on your file. A 12-month SIM-only plan usually involves a check too, because you're committing to a fixed term paid in arrears, though the bar is far lower as there's no handset value at stake. A 30-day rolling SIM-only deal often triggers only a soft search, or none at all. True pay-as-you-go, where you top up in advance, involves no credit check and no entry on your credit file - so pay-as-you-go doesn't affect your credit score and report in either direction. Split contracts, where the handset finance and the airtime are two separate agreements, still involve a credit check on the finance element.

How on-time payments help build your credit history

A phone contract can build credit. Twenty-four consecutive on-time payments create exactly the kind of stable, long-running repayment record that lenders like to see. That matters most if you have a thin file - if you're young, newly arrived in the UK, or have simply never borrowed - because a phone contract is one of the more accessible ways to start proving you can manage a regular commitment. It won't transform your score overnight, but it adds depth and length to a file that would otherwise be close to empty.

What a missed payment does

The flipside is real. A payment more than a month late is reported as a late marker, which is likely to reduce your score and stays visible to lenders. If the account falls several months behind, the network can register a default - a far more serious entry that signals the agreement has broken down. Defaults are one of the biggest negative markers on a credit file and can make it harder to get a mortgage, a loan or even another phone contract. Both late markers and defaults remain on your file for six years from the date they were recorded, regardless of whether you later clear the balance.

If you're refused a contract

Every application leaves a hard search footprint that other lenders can see for one to two years, depending on the agency. Several applications in quick succession look like distress borrowing, so if you're declined, resist the urge to apply straight to the next network. Check your credit report first - checking your score with ClearScore won't affect it - then correct anything that's wrong and understand why the decision went against you.

Getting a phone with a lower credit score

If your score sits in Let’s start climbing (0-409) or Moving on up (410-519), you may still be able to get a phone contract, though approval rests on the network's own checks, and you could be offered a smaller data allowance, asked for an upfront payment towards the handset, or restricted to a lower-value model. Another option is to sidestep the credit check entirely: you could compare buying a handset outright or refurbished with a 30-day rolling SIM-only plan or pay-as-you-go. That can keep your commitments light while you rebuild, though costs depend on the handset, allowance and provider, and it removes the risk of adding a fresh default to a file that's already under strain.

How do you choose the right plan?

Which mobile plan you should choose really depends on three factors: your level of usage, whether you already own a good phone and how much commitment you’re comfortable taking on.

Phone contracts are typically the most expensive option. They also last the longest (usually 24 months), which means they involve the highest level of commitment. However, they’re a way to get the latest handset without paying any money up front.

If, on the other hand, your phone is still in good working order, a pay-as-you-go SIM may be the better option. 12-month deals tend to be slightly cheaper than 30-day rolling plans, but not by much.

As a rule of thumb, staying on pay-as-you-go is only worthwhile if you’re a very light user. You can usually get a SIM-only plan on a 30-day rolling plan for under £10 a month. With this in mind, pay-as-you-go is typically only worthwhile if you monthly mobile spend is less than this.

Phone contracts and pay-as-you-go: your questions answered

Can I leave a phone contract early, and what will it cost?

Yes, but you'll normally have to pay off the remainder of the term. Networks calculate an early termination charge based on the monthly payments you have left, usually with a small discount applied for paying early. Ask for a settlement figure in writing before you commit. If your network has raised prices in a way that wasn't clearly disclosed when you signed, you may have a right to leave penalty-free - check the notification you were sent.

Are phones still network locked in the UK?

Not on new sales. Since December 2021, UK networks have been barred from selling locked handsets, so anything bought new since then works with any SIM. Older contract phones may still be locked, but networks must unlock them free of charge on request, usually within a couple of working days.

How do I keep my number when I switch?

Text PAC to 65075 and your current network must send you a porting authorisation code within one minute, along with any early exit charges you'd owe. Give that code to your new provider and your number moves across within one working day. If you don't want to keep your number, text STAC to 75075 instead. Your old contract closes automatically - you don't need to ring up and cancel.

What happens when my contract ends - will my bill drop?

Not automatically on most bundled contracts. You'll be sent an end-of-contract notification setting out what you're paying, what happens next and the best deals available to you, but unless you act you can roll on at the same monthly price for a handset you've already paid for. On a split contract, the handset element stops on its own and your bill falls. Either way, the end of your term is the moment to switch, renegotiate or drop to SIM-only.

Can I get a phone contract with no credit check or lower credit?

Genuinely no-credit-check pay-monthly handset deals are rare and usually expensive. More realistic options are a lower-value handset, an upfront payment towards the phone, or a guarantor arrangement. If your score sits in Let’s start climbing (0-409), you could compare buying a handset outright or refurbished and pairing it with a rolling SIM-only plan or pay-as-you-go, neither of which requires a hard credit check. Which works out cheaper depends on the handset, allowance, provider and your circumstances.

Do I need a bank account or direct debit?

Almost always, yes. Networks price contracts on the assumption of a direct debit and often charge more for other payment methods. Some providers accept a basic bank account, which is worth knowing if you've been declined for a standard current account.

Does pay-as-you-go credit expire?

It can. Most networks require some chargeable activity - a call, text or top-up - within a set window, commonly 90 to 180 days, or the credit and eventually the number are withdrawn. If a pay-as-you-go phone sits in a drawer for emergencies, make a short call every few months to keep it live.

Is a rolling 30-day SIM better than a 12-month SIM?

It depends on how settled you are. Twelve-month deals are usually a pound or two cheaper each month and lock in that price, but you're committed and may face an exit charge. A 30-day rolling plan costs marginally more and can be changed at any time, which suits anyone who moves around, wants to chase deals, or would rather not add a fixed-term commitment to their credit file.

What a phone contract really costs over 24 months

Working out whether it's cheaper to buy a phone outright or take it on contract takes about five minutes and a calculator, and the answer is usually clearer than the marketing suggests. Here's how to run the numbers properly.

• Step 1 - total the contract. Multiply the monthly price by the number of months in the term, then add any upfront handset fee. A £42 a month deal over 24 months with £99 up front is £42 × 24 = £1,008, plus £99, giving £1,107. That's the real price, not the £42 on the advert.

• Step 2 - price the handset on its own. Look up what the same model costs to buy outright from the manufacturer or a retailer, then check the refurbished price from a seller offering a proper warranty. A refurbished flagship a generation old often lands at 40-60% of the new price. Many retailers also offer 0% finance, which spreads the cost without adding to it.

• Step 3 - add a comparable SIM-only plan. Find a SIM-only deal with a similar data allowance and multiply it across the same 24 months. A £12 a month rolling SIM comes to £288 over two years.

• Step 4 - compare the totals. Using the figures above, buying a £600 handset outright plus £288 of airtime is £888 against £1,107 on contract - a gap of £219. Go refurbished at £350 and the total drops to £638, saving well over £400. The gap widens further with cheaper mid-range handsets and narrows on the very newest flagships.

• Factor in mid-contract price rises. Most UK networks now increase prices every spring, either by a fixed pound amount per month or by a percentage linked to inflation. A rise applies to every remaining month of your term, so a £2 monthly increase in year one adds well over £30 across the contract. Your step 1 figure is a floor, not a ceiling - and you generally can't exit penalty-free if the rise was clearly set out when you signed.

• Consider a split contract. Some networks separate the handset finance from the airtime into two agreements. The advantage is that when the handset is paid off, that payment simply stops and your bill drops to the airtime element alone. On a traditional bundled contract, nothing happens automatically at the end of the term - you can carry on paying the full amount for a phone you already own outright.

• Add the extras you'll actually use. Out-of-bundle data, calls to premium and non-geographic numbers, international calls and roaming outside your allowance all sit outside the headline price. If you travel regularly or routinely blow through your data, price those in - they can add several pounds a month and quietly close the gap between options.

• Know when the contract genuinely wins. If you want the newest flagship, don't have £800 sitting available, and would otherwise put the handset on a credit card at 20-something per cent interest, a contract can be the cheaper and safer route. You also get manufacturer warranty cover handled through the network for the life of the agreement, and the payment record helps build your credit history. The contract isn't automatically the bad deal - it's just rarely the cheap one.