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 which platform will your accountant actually want to work with?
Let’s cut through the noise. Here’s a practical, honest comparison of the three platforms that dominate the NI market: Xero, QuickBooks, and Sage.
The quick overview
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 the go-to for small and medium businesses across the UK and Ireland. Its strength is simplicity, a clean interface, and a massive ecosystem of add-on apps.
QuickBooks Online (we’re talking about the cloud version, not the old desktop product) is Intuit’s offering. It’s particularly strong in the US market but has made serious inroads in the UK. It tends to offer slightly more built-in functionality out of the box, especially around reporting.
Sage is the 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. These days, Sage offers cloud products (Sage Business Cloud Accounting and Sage Intacct for larger businesses), but many NI firms still run the desktop version. We’ll focus mainly on the cloud product here.
Feature comparison
| Feature | Xero | QuickBooks Online | Sage Business Cloud |
|---|---|---|---|
| Starting price | £15/month (Starter) | £12/month (Simple Start) | £12/month (Start) |
| Mid-tier price | £30/month (Standard) | £22/month (Essentials) | £26/month (Standard) |
| Bank feeds | Excellent (open banking) | Good (open banking) | Good (open banking) |
| Payroll | Add-on (from £5/month) | Built-in (from Essentials) | Add-on (from £7/month) |
| VAT returns | MTD-compliant, built-in | MTD-compliant, built-in | MTD-compliant, built-in |
| Multi-currency | From Standard plan | From Essentials plan | Standard plan |
| Mobile app | Strong (iOS and Android) | Strong (iOS and Android) | Basic |
| Integrations | 1,000+ apps | 750+ apps | 200+ apps |
| Unlimited users | Yes (all plans) | No (varies by plan) | No (varies by plan) |
| Quotes and invoicing | Yes | Yes | Yes |
| Project tracking | Add-on | Built-in (Plus plan) | Limited |
| Inventory | Basic (or add-on) | Built-in (Plus plan) | Basic |
A few things jump out from that table. Xero’s unlimited users policy is genuinely unusual and valuable if you’ve got a team. QuickBooks packs more features into its core product. Sage trails on integrations and mobile, though it’s improving.
Which platform suits which business?
Sole traders and freelancers
If you’re a one-person operation keeping things simple, any of the three will do the job. QuickBooks Simple Start is the cheapest entry point and includes enough features for most sole traders. Xero Starter is also solid, though slightly pricier. Sage Start works fine but its mobile app lets it down if you’re often on the move.
Small limited companies (under £500k turnover)
This is where Xero really shines. The unlimited users mean your bookkeeper, accountant, and business partner can all access the system without extra cost. The interface is intuitive enough that most business owners can handle day-to-day bookkeeping themselves, with their accountant reviewing periodically. QuickBooks Essentials is a strong alternative, especially if you want payroll included without an add-on.
Growing companies (£500k to £5M turnover)
At this stage, reporting and integrations become critical. Xero’s app marketplace is its biggest advantage here. Need CRM integration? Inventory management? Expense tracking? There’s almost certainly a Xero-connected app for it. QuickBooks Plus offers solid project tracking and more detailed reporting. Sage starts to fall behind at this level unless you’re looking at Sage Intacct, which is a different (and much more expensive) product entirely.
Multi-entity or group companies
If you’re running multiple companies, Xero handles this well with its multi-org feature, though it’s priced per entity. QuickBooks can manage multiple companies but each needs its own subscription. For genuinely complex group structures, you may be looking at Sage Intacct or an ERP system.
Making Tax Digital compatibility
All three platforms are fully MTD-compatible for VAT, and all three are preparing for MTD for Income Tax Self Assessment (MTD for ITSA), which is being phased in from April 2026.
Important: If you’re a sole trader or landlord with income over £50,000, MTD for ITSA affects you from April 2026. Those with income over £30,000 follow from April 2027. Make sure your software is ready.
Xero, QuickBooks, and Sage are all on HMRC’s list of recognised MTD-compatible software. You won’t go wrong with any of them on this front.
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. If you’re dealing with AIB in the Republic as well, Xero tends to handle the dual-jurisdiction banking most smoothly.
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.
Xero handles multi-currency from its Standard plan and has strong support for different tax rates on different invoice lines. QuickBooks manages this from its Essentials plan. Sage can do it, but it’s less intuitive to set up.
If cross-border trade is a significant part of your business, this is a genuine differentiator. Get it wrong and you’ll spend hours on manual adjustments.
Why Arro uses Xero (and what that means for you)
We’ll be upfront: Arro is a Xero practice. We use it internally and recommend it to most of our clients. Here’s why.
Real-time collaboration. When your books are on Xero, we can see the same data you see, at the same time. No waiting for files to be emailed back and forth. No version control headaches. If something needs attention, we can flag it immediately rather than discovering it months later at year end.
API integrations. Xero’s open API means we can connect it to the other tools we use, making your compliance faster and reducing manual data entry. Less manual work means fewer errors and lower fees.
Cloud-first architecture. Xero was built for the cloud from day one. It wasn’t a desktop product that got bolted onto the internet. That shows in the user experience, the reliability, and the speed of updates.
That said, we’re not dogmatic about it. If you’re happily running QuickBooks and your processes work well, we’re not going to insist you switch. We work with all three platforms. But if you’re starting fresh or ready for a change, Xero 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:
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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.
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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.
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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.
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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.
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Get your accountant involved early. Seriously. Tell us before you switch, not after. We can help with the setup, check your opening balances, and make sure your VAT reporting stays clean through the transition.
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. There’s only what’s best for your business, your budget, and your workflow. Here’s the short version:
- Choose Xero if you want the best app ecosystem, unlimited users, and seamless accountant collaboration.
- Choose QuickBooks if you want more built-in features (especially payroll and project tracking) at a slightly lower entry price.
- Choose Sage if you’re already on it and it’s working, or if you need Sage Intacct for a larger, more complex operation.
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 can help you evaluate your options and get set up. We also offer Xero training for business owners who want to handle day-to-day bookkeeping themselves, with our team handling the compliance side.