TLDR
Outsourced bookkeeping in the UK costs between £50 and £3,500 per month in 2026, depending on business size, transaction volume, and the level of compliance work involved. Sole traders and micro-businesses generally pay £50 to £150 a month. Small limited companies pay £100 to £300. Growing SMEs that need VAT and payroll sit around £250 to £600, and larger SMEs with complex requirements pay £400 to £2,000 or more.
Two things have pushed UK accounting practices toward outsourcing – cost and convenience. Although recent trends tend to indicate convenience as a huge selling point; cost still remains the number one priority for most businesses. Numerous studies seem to also back up this data with trends showing a general increase in specialized outsourcing-related bookkeeping services.
Delving further into the cost analysis, the math over the last year has shifted significantly. Hiring a fulltime accountant got more expensive in April 2025 when employer National Insurance was introduced. As a result, the gap between paying a salary and paying a monthly fee further widened.
Not surprisingly, the question everyone gets stuck on is price. And it’s a fair question. Thanks mostly to vague answers found online quoting different figures (often US). Getting the right answer is weirdly harder than ever. This blog provides the latest update on how much does outsourcing bookkeeping cost in 2026.
What does outsourced bookkeeping cost in 2026? (Quick answer)
The answer to this question as you might imagine is not a fixed one. It varies largely on the size of the business.
There are typically monthly bands by business size:
| Business Type | Monthly Transactions | Typical Monthly Cost |
|---|---|---|
| Sole Trader | 0-50 | £50-£150 |
| Small Limited Company | 50-150 | £100-£300 |
| Growing SME | 150-500 | £250-£600 |
| Established SME | 500-1,000 | £400-£1,200 |
| Complex Multi-Entity Business | 1,000+ | £1,200-£3,500+ |
Top tip: Fees vary largely based on transaction volume. Businesses with a higher number of transactions tend to incur higher bookkeeping fees; as opposed to employee headcount.
What are the popular pricing models for outsourced bookkeeping
Bookkeeping outsourcing companies don’t charge the same. The model they use changes how your final figure gets built. Here are four pricing models that are popular amongst outsourcing providers.
Hourly
Freelancers and smaller firms often charge by the hour. Rates sit anywhere from £13 to £60-plus, with most standard work landing between £20 and £35. Hourly is fine for a one-off, say a clean-up of books that have drifted, but it gets unpredictable fast once volumes climb or the scope is fuzzy. The invoice can balloon and you won’t see it coming.
Fixed monthly
The most popular option, and the easiest to budget for. You agree a scope, you pay one fee, you know your number every month. Most providers set the fee by size and volume. Watch for minimum contract terms, and bear in mind a very low-activity business can end up overpaying on a flat fee.
Per-transaction
You pay per invoice, receipt, or bank line, usually £0.50 to £2.00, with the rate dropping as volume rises. Good fit for high-volume retail and e-commerce where the flow is steady and predictable. Past a few hundred transactions a month it starts to lose its appeal.
Tiered packages
Named tiers, basic through premium, each adding more service. The appeal is clarity. You can see what you’re getting and where you’d go next as the business grows.
| Pricing Model | Typical Cost | Best For | Main Drawback |
|---|---|---|---|
| Hourly | £20-£60/hr | One-off work | Unpredictable costs |
| Fixed Monthly | £50-£3,500/month | Most SMEs | May overpay during quiet periods |
| Per Transaction | £0.50-£2 per transaction | Retail & ecommerce | Costs rise quickly with volume |
| Tiered Packages | Varies by package | Growing businesses | May include unused services |
What is actually driving the cost of outsourcing in 2026?
Most pricing guides forget to factor in updates that have emerged, especially in the last two years. Here are the major updates in UK accounting that are pushing the numbers.
MTD for Income Tax has brought in significant changes
This is the big one. Making Tax Digital for Income Tax went live on 6 April 2026 for self-employed people and landlords earning over £50,000. The threshold falls to £30,000 in April 2027, then £20,000 in April 2028. So, it’s bringing in more businesses under the tax purview.
The reason it affects cost is majorly due to its timing. Under the old way, you could let the books slide and sort everything out at year-end. MTD ends that. Records have to be kept digitally as you go, and updates go to HMRC every quarter. Bookkeeping turns from one annual scramble into a steady, four-times-a-year job. This requires more frequent work, more often, and it costs more to deliver.
| MTD Requirement | Frequency |
|---|---|
| Digital Record Keeping | Ongoing |
| Income & Expense Updates | Quarterly |
| End of Period Statement | Annually |
| Final Declaration | Annually |
Providers who’ve built their process around MTD include that into their price structure. And it’s worth paying for. Miss an MTD deadline and the penalties start at £200 and climb with the tax owed. Getting it wrong can cost more than a whole year of doing it properly.
AI is making some work cheaper and other work not cheaper at all
This is the bit that gets oversimplified (particularly on social media); it’s worth being thorough.
Over the years, software has gotten genuinely good. Bank feeds pull in automatically, receipts get scanned, invoice data is read line by line, and categories are suggested without anyone typing them. Roughly 45% of accountants now lean on AI for repetitive stuff. For high-volume, samey work, that’s pushing prices down, because running one more transaction through an automated pipeline barely costs anything.
What it hasn’t done is make bookkeeping free. The work moved, it didn’t vanish. Someone still has to look at what the software flags, confirm the calls it isn’t sure about, untangle the transactions that don’t fit the pattern, and apply real judgment to anything touching compliance. That’s skilled review, and skilled review costs money.
So, the picture in 2026 is split. The routine, automatable layer is getting cheaper. The qualified-human layer on top is holding firm or going up. A provider who’s invested in good automation can often hand you more for the same fee, but nobody competent is giving away the oversight.
The April 2025 NI rise made hiring more expensive
The introduction of National Insurance is a big part of why outsourcing enquiries jumped this year.
From April 2025, employer National Insurance went from 13.8% to 15%, and the point where employers start paying it dropped from £9,100 to £5,000. On a bookkeeper earning around £29,000, that alone added about £3,600 a year. Stack on the pension contribution, plus recruiting, training, kit, and the time spent managing someone, and the true cost of an in-house bookkeeper sits well north of the salary. Often £34,000 to £61,000 once it’s all counted.
That’s the gap that’s making many consider outsourcing. Even where outsourced fees have crept up, the comparison has got more lopsided, not less.
Volume and complexity
The most direct lever on price is simply how much there is to do and how knotty it is. Fifty clean transactions a month is easy. Eight hundred spread across several bank accounts, a couple of payment processors, and more than one currency is a different job entirely.
And complexity costs on its own, separate from volume. Multi-currency, intercompany entries, partial exemption on VAT, CIS for construction, stock and inventory, all of it needs a more skilled pair of hands, and all of it lifts the fee.
Service scope
Plain bookkeeping, entering transactions and reconciling the bank, sits at the floor of the range. Everything you bolt on lifts it: VAT returns, payroll, CIS, management accounts, credit control. A full outsourced finance function is a long way from basic reconciliation, and the price reflects the distance.
Basis period reform
Quieter, but still in the mix. Basis period reform, with 2025-26 as the transitional year, makes sole traders and partnerships line up their accounting period with the tax year. It rewards books that are kept current all year instead of rebuilding every spring, which is one more pull toward the same ongoing rhythm MTD is already forcing.
The costs that don’t show up in the headline fee
The monthly quote is rarely the full picture. Four things tend to surprise people, and a decent provider will lay them out before you sign rather than after.
- Onboarding and data migration. Usually, £200 to £500 to get your books onto their systems and the processes set up. Some bundle it in. Some don’t. Ask.
- Catch-up work. If you’re behind, getting current normally costs one to three months of the regular fee, or it’s billed by the hour. Eight months of unreconciled records is a bill before the proper service even starts.
- Software. MTD-compatible software costs something. Some providers fold it into the fee, others pass it straight through. Check which.
- Out-of-scope compliance. MTD updates, PAYE tweaks, sorting out a looming penalty, these sometimes sit outside the monthly package and get billed on their own. Pin down what’s in and what’s out.
In-house vs outsourced detailed analysis
Most comparisons between in-house vs outsourced bookkeeping line up monthly fee against a bookkeeper’s salary. What this doesn’t reveal is that the salary might look lower on its own. However, that comparison leaves out most other costs.
A real in-house figure for 2026 is the salary, around £25,000 to £32,000, plus employer NI at the new 15%, plus the pension, plus recruiting, training, software, equipment, and the time someone spends managing the role. Add it up and you’re usually between £34,000 and £61,000 a year, depending on the level and where you are in the country.
Most SMEs spend a slice of that outsourcing, and they only pay for what they use. The figure people quote is 40% to 60% saved once it’s all counted, and since the NI change that saving has grown.
Annual cost of in-house bookkeeping
| Cost Element | In-House Bookkeeper |
|---|---|
| Salary | £25,000-£32,000 |
| Employer NI | £3,000-£4,500 |
| Pension Contributions | £750-£1,500 |
| Software Licences | £500-£2,000 |
| Recruitment & Training | £1,000-£5,000 |
| Equipment & Overheads | £500-£2,000 |
| Total Annual Cost | £34,000-£61,000+ |
Annual cost of outsourced bookkeeping
| Service Level | Annual Cost |
|---|---|
| Basic | £600-£1,800 |
| Small Business | £1,200-£3,600 |
| SME | £3,000-£7,200 |
| Complex SME | £7,200-£24,000 |
When does in-house actually win?
When bookkeeping is a daily, full-time job, when volumes are very high, say 500-plus a month, when the structure is genuinely complex, or when the business can shrug off the full employment cost without blinking. For most SMEs, none of that holds.
How to know if the cost is right
Before deciding on the cost, it’s important to do some due diligence or ask questions of the provider in question.
- Look at the total costs – A £20-an-hour freelancer with no real qualifications who misses an MTD obligation can cost you far more than a £45-an-hour firm that catches it before HMRC does.
- Get the breakdown before you commit – Base fee, every add-on, and any periodic charges likely for your kind of business. If a provider is vague at the quoting stage, expect surprises later.
- Check the credentials – ACCA, ICAEW, or AAT, real HMRC experience, and proper MTD competence count for more in 2026 than they did a couple of years back, because there’s less room to get compliance wrong now.
- Confirm UK GDPR compliance – Ask where the data lives and make sure there’s UK-qualified oversight on the work. Offshore delivery with UK supervision usually lands the best balance of cost and quality.
Frequently Asked Questions
Usually, yes, especially for small and medium businesses. Add employer NI, pension, software, training, and management time to a salary and the true cost of hiring runs well past the outsourced fee. You also skip the recruitment wait and the cost of covering holidays and sick days.
A sole trader with low volumes generally pays £50 to £150 a month. It goes up with VAT, or if the trader is now inside MTD for Income Tax and needs quarterly submissions handled.
It can, because it means digital records and quarterly submissions instead of one year-end job. The work is spread out and happens more often. But compliant bookkeeping almost always costs less than the penalties for getting MTD wrong, which start at £200 and rise with the tax owed.
For routine, high-volume work, yes, automation is bringing that down. But qualified review of exceptions, complex transactions, and compliance still costs money, and that part isn’t dropping. The honest 2026 answer: cheaper routine processing, steady or rising costs for skilled oversight.
Usually transaction entry, bank reconciliation, and basic reporting. VAT, payroll, CIS, and management accounts are typically add-ons that lift the monthly fee.
Final Thoughts on Outsourcing Bookkeeping
In 2026, most UK businesses pay between £50 and £3,500 a month for outsourced bookkeeping, with the bulk of SMEs landing somewhere in the £100 to £600 range. Three things have shaped that this year: MTD for Income Tax forcing a quarterly rhythm, AI cutting the cost of routine work while skilled review holds its ground, and the NI rise making in-house hiring pricier.
But cost is only half the story. The other half is convenience, getting the books off your desk and handing them to someone who does this all day. The right question isn’t just what it costs. It’s whether the scope is clear, the pricing is honest about the add-ons, and the provider actually knows what they’re doing with MTD. Get those right and the price tends to look after itself.
