Choosing accounting software is one of those decisions that feels straightforward until you’re three tabs deep in comparison pages, more confused than when you started. If you’re running a business in Northern Ireland, you’ve got a few extra things to think about: will your local bank connect properly? What happens when you invoice a customer in the Republic? And, since April 2026, is your software actually ready for Making Tax Digital?
We’ll be upfront from the start: Arro runs on Sage. It is the platform we use in-house every day and the one we set most new clients up on. That doesn’t make the other two bad; Xero and QuickBooks are both capable products, and we support clients on all three. But it does mean we can tell you exactly what each platform is like to live with, not just what the feature pages say. Here’s the practical, honest comparison.
The quick overview
Sage is the UK compliance veteran. If you’ve been in business for more than a decade in NI, there’s a good chance you’ve used Sage 50 at some point. The modern product, Sage Accounting (formerly Sage Business Cloud), is fully cloud-based, with its roots in UK accounting practice: VAT, payroll, and HMRC filing have been its home turf for decades. It is the platform we run at Arro, which means setup, training, and the quarter-end hand-off between your records and our work are the cleanest of the three.
Xero is the cloud-native option that’s taken the accounting world by storm over the past decade. Built in New Zealand, it’s become a go-to for small and medium businesses across the UK and Ireland. Its standout strengths are a clean interface, unlimited users, and a massive ecosystem of add-on apps.
QuickBooks Online is Intuit’s offering. It’s particularly strong in the US market but has made serious inroads in the UK. It tends to pack more built-in functionality into its core product, especially around payroll and project tracking.
Feature comparison
| Feature | Sage Accounting | Xero | QuickBooks Online |
|---|---|---|---|
| Starting price | £14/month (Start) | £30/month (Starter) | £10/month (Self-Employed) |
| Mid-tier price | £28/month (Standard) | £55/month (Standard) | £30/month (Essentials) |
| MTD VAT | HMRC-recognised, built-in | HMRC-recognised, built-in | HMRC-recognised, built-in |
| MTD ITSA | HMRC-recognised | HMRC-recognised | HMRC-recognised |
| Bank feeds | Open banking | Open banking | Open banking |
| Receipt capture | AutoEntry | Hubdoc | Built-in |
| Payroll | Sage Payroll add-on | Add-on | Built-in (from Essentials) |
| Multi-currency | Yes | From Standard plan | From Essentials plan |
| Unlimited users | No (varies by plan) | Yes (all plans) | No (varies by plan) |
| App integrations | Core marketplace | 1,000+ apps | 750+ apps |
Pricing correct as of May 2026; check the vendor sites before committing, as plans and promotions change regularly.
A few things jump out from that table. Sage is the strongest value at the mid-tier, where most established small businesses actually sit. Xero’s unlimited-users policy is genuinely unusual and valuable if you’ve got a team, and its app marketplace is the biggest of the three. QuickBooks packs more into its core product at a low entry price. All three are fully MTD-ready, so compliance won’t be the deciding factor; how the software fits your business, and who supports you on it, will be.
Which platform suits which business?
Sole traders and freelancers
Any of the three will do the job. Sage Accounting Start at £14/month covers invoicing, bank feeds, and MTD submissions, and because it’s the platform we run, we can set it up and have you trained in an afternoon. QuickBooks Self-Employed is the cheapest entry point on paper. Our honest advice: at this scale, the platform your accountant works in every day matters more than a few pounds a month, because it decides how much friction there is every quarter.
Small limited companies (under £500k turnover)
This is where being on the same platform as your accountant pays for itself. On Sage, we see the same live data you see: no files emailed back and forth, no version-control headaches, and anything that needs attention gets flagged immediately rather than surfacing at year end. Xero’s unlimited users are worth weighing if several people need daily access; QuickBooks Essentials is a strong alternative if you want payroll built in without an add-on.
Growing companies (£500k to £5M turnover)
At this stage, reporting and integrations become critical. Sage Accounting Plus handles the core well, and for businesses that outgrow it, the natural step up is Sage Intacct, a genuine mid-market product. Xero’s app marketplace is its biggest advantage here: CRM, inventory, expenses, there’s almost certainly a connected app for it. QuickBooks Plus offers solid project tracking and detailed reporting. This is the bracket where we’d want a conversation before you commit, because unwinding the wrong choice at this size is expensive.
Multi-entity or group companies
All three handle multiple companies, but each entity generally needs its own subscription. For genuinely complex group structures, Sage Intacct or an ERP system is usually the right conversation to have, and we can help you scope it.
Making Tax Digital: all three qualify, but the deadlines are live now
MTD for Income Tax Self Assessment went live on 6 April 2026 for sole traders and landlords with gross income over £50,000. The first quarterly update for that cohort is due by 7 August 2026. The threshold drops to £30,000 in April 2027 and £20,000 in April 2028, so most self-employed people and landlords will be in the regime within two years.
Sage, Xero, and QuickBooks are all on HMRC’s list of recognised MTD software for both VAT and ITSA. You won’t go wrong with any of them on compliance. What differs is how much help you’ll need getting the records right, because MTD is a records discipline, not just a submission button. See our Making Tax Digital guide for every threshold and date, or our MTD service page for how we run it for clients.
The NI angle: bank feeds and cross-border trade
NI bank feed support
This is where things get practical. If your software can’t connect to your bank, you’re stuck with manual imports, and nobody wants that.
Ulster Bank: Supported by all three platforms via open banking. Since Ulster Bank NI (now part of NatWest Group) transitioned its systems, connectivity has been stable.
Danske Bank: Supported via open banking on all three platforms. A few years ago this was a pain point, but open banking regulations have levelled the playing field. Direct feeds work reliably now.
AIB (NI branches): Supported on all three, including dual-jurisdiction setups where you also bank with AIB in the Republic.
Bank of Ireland: Supported across all platforms, though if you hold accounts in both jurisdictions, check that your specific account type connects properly.
Cross-border invoicing (trading with ROI)
This is where NI businesses face a challenge that businesses in Birmingham or Bristol don’t. If you’re selling goods or services to customers in the Republic of Ireland, you need software that handles:
- Multi-currency: Invoicing in euros while your base currency is sterling.
- Dual VAT treatment: Under the Windsor Framework, NI follows EU VAT rules for goods but UK rules for services. Your software needs to accommodate this.
- Customer currency preferences: Some ROI customers want to see invoices in euros; others are happy with sterling.
All three platforms can handle this once configured correctly, and configuration is the part that catches people out. As a Sage practice we set up the dual VAT treatment for cross-border clients as standard; on Xero it’s available from the Standard plan and on QuickBooks from Essentials. If cross-border trade is a significant part of your business, get this right on day one or you’ll spend hours on manual adjustments.
Why Arro runs on Sage (and what that means for you)
Real-time collaboration. When your books are on Sage, we see the same data you see, at the same time. No waiting for files to be emailed back and forth. If something needs attention, we flag it immediately rather than discovering it months later at year end.
Support from the people who use it daily. Because Sage is our in-house platform, we don’t hand you a helpdesk number. We set you up, train you, and answer questions from direct experience. The hand-off between your records and our work at quarter-end and year-end is the cleanest of any option here.
UK compliance pedigree. Sage has been building for UK VAT, payroll, and HMRC filing for decades. MTD VAT and MTD ITSA are built in, and receipt capture through AutoEntry keeps the records digital from source, which is exactly what MTD requires.
Partner terms. As a Sage practice we set up and manage client subscriptions on partner terms, so you’re never left on your own with the software.
That said, we’re not dogmatic about it. If you’re happily running Xero or QuickBooks and your processes work well, we’re not going to insist you switch; we work with all three platforms every week. But if you’re starting fresh or ready for a change, Sage is where we’d point you.
Migration tips: switching without the headache
If you’re moving from one platform to another (or from spreadsheets to proper software), here are the practical steps:
-
Pick your switchover date. The start of a new financial year is cleanest, but any VAT quarter start works well too. Don’t try to switch mid-month.
-
Export your data. All three platforms let you export your chart of accounts, customer/supplier lists, and transaction history as CSV files. Do this before you cancel anything.
-
Set up your new platform properly. Get your chart of accounts, VAT rates, and bank feeds configured before you start entering transactions. A few hours of setup saves weeks of corrections later.
-
Run parallel for one month. Keep your old system accessible (most cloud platforms let you view data on a cancelled subscription) while you verify the new system is capturing everything correctly.
-
Get your accountant involved early. Seriously. Tell us before you switch, not after. We handle Sage migrations start to finish: opening balances, VAT continuity, bank feeds, and training.
NI-specific note: If you’re switching software and you trade cross-border, make sure your new platform’s tax rates are configured for both UK and EU VAT treatments before you start invoicing. Getting this wrong creates a mess that takes time to unravel.
The bottom line
There’s no single “best” accounting software in the abstract. There’s what’s best for your business, your budget, and your workflow. Here’s the short version:
- Choose Sage if you want strong UK compliance pedigree, sensible pricing, and your accountant working in the same system as you. It’s our default recommendation for NI businesses starting fresh or ready for a change.
- Choose Xero if unlimited users or a specific app-marketplace integration is central to how you work, or you’re already on it and it’s working.
- Choose QuickBooks if you want payroll and project tracking built in at a low entry price, or you’re already on it and it’s working.
Whatever you choose, the most important thing is that you actually use it. The best accounting software in the world is useless if your receipts are still in a shoebox.
How Arro can help
If you’re unsure which platform is right for your business, or you’re ready to migrate and want it done properly, we’ll help you evaluate the options and get set up. We provide Sage setup and training on partner terms for business owners who want to handle day-to-day bookkeeping themselves, with our team handling the compliance side.