Best Invoice Software for Small Businesses UK
Invoicing is deceptively simple in theory — you do work, you send a bill, you get paid. In practice, it is one of the most frustrating parts of running a small business. Chasing late payments, keeping track of who owes what, making sure your invoices meet UK legal requirements, and reconciling payments with your bank account all take time you would rather spend on actual work.
The right invoicing software handles most of this for you. The wrong software adds another admin burden to an already long list. Here is how the main options compare for UK small businesses in 2026.
What Good Invoice Software Should Do
Before comparing platforms, here is what matters most for small business invoicing in the UK.
Professional Invoice Creation
Your invoices need to include specific information to be legally compliant: your business name, address, and contact details; the customer's name and address; a unique invoice number; the date; a description of goods or services; the amount; and your payment terms. If you are VAT-registered, you also need your VAT number, the VAT rate, and the VAT amount.
Good software generates invoices with all of this automatically, using professional templates that make your business look established even if you started last month.
Payment Collection
The fastest way to get paid is to make paying easy. Software that includes payment links — letting your customers pay by card or bank transfer directly from the invoice — significantly reduces payment times. Some platforms report a reduction in average payment time from 30+ days to under a week when online payment links are added.
Automatic Payment Reminders
Chasing invoices manually is uncomfortable and time-consuming. Software that sends polite reminders automatically — before the due date, on the due date, and at escalating intervals after — saves you from having awkward conversations with clients.
Bank Reconciliation
When a payment arrives, your software should match it to the correct invoice automatically. This keeps your books up to date without manual effort and gives you a clear picture of what is outstanding at any time.
Recurring Invoices
If you bill the same amount to the same clients monthly (retainers, subscriptions, ongoing services), recurring invoice functionality saves you from creating the same invoice repeatedly.
Integration With Accounting
Invoicing in isolation creates double work. If your invoicing software does not feed into your accounting, you end up entering figures twice — once for the invoice and once for your books. Integrated platforms handle both.
The Best Invoice Software for Small Businesses
1. Xero — Best Overall Invoicing Platform
Price: £15–£47/month | Payment links: Yes | Recurring invoices: Yes | Bank reconciliation: Yes
Xero's invoicing is genuinely excellent. Professional templates, customisable branding, online payment collection via Stripe or GoCardless, automatic payment reminders, recurring invoices, and seamless integration with the accounting features. The invoice tracking dashboard shows you at a glance what is outstanding, overdue, and paid.
For small businesses where invoicing is a core activity — you send invoices regularly and need to track payments carefully — Xero is the strongest option. The invoicing works well on mobile too, so you can create and send an invoice immediately after completing a job.
The downside is cost. The cheapest plan (£15/month) limits you to 20 invoices per month. Most small businesses need the Growing plan at £33/month for unlimited invoicing, which adds up over the year.
Strengths: Excellent invoice templates, online payments, auto-reminders, strong tracking, mobile invoicing Weaknesses: Expensive for unlimited invoicing, complex for simple needs
See our Accounted vs Xero comparison for a broader platform comparison.
2. QuickBooks — Best for Invoice + Expense Tracking
Price: £12–£32/month | Payment links: Yes | Recurring invoices: Yes | Bank reconciliation: Yes
QuickBooks combines solid invoicing with good expense tracking, making it a strong choice for small businesses that need both. The invoice creation is straightforward, with professional templates and the ability to accept card payments directly through invoices.
The estimate-to-invoice workflow is useful for tradespeople and service businesses — you create an estimate, the customer approves it, and it converts to an invoice with one click. Automatic payment reminders and recurring invoices are both included.
Strengths: Good estimates-to-invoices workflow, integrated expense tracking, reasonable pricing, card payments Weaknesses: Some features US-focused, interface can feel cluttered
Read our Accounted vs QuickBooks comparison.
3. FreeAgent — Best Free Invoicing (With NatWest)
Price: £14.50/month (free with NatWest/RBS) | Payment links: Yes | Recurring invoices: Yes | Bank reconciliation: Yes
FreeAgent includes full invoicing in its platform — professional templates, online payment collection, recurring invoices, and automatic reminders. The project-based invoicing is particularly good, letting you track time and expenses against a project and then generate an invoice from the tracked items.
If you bank with NatWest, RBS, or Ulster Bank, all of this is free. For a free product, the invoicing features are comprehensive and professional.
Strengths: Free with NatWest, project-based invoicing, time tracking integration, full-featured Weaknesses: Templates less modern than competitors, limited customisation
4. Sage Accounting — Best for Traditional Invoicing
Price: £12–£26/month | Payment links: Yes | Recurring invoices: Yes | Bank reconciliation: Yes
Sage's invoicing is reliable and professional. It handles quotes, estimates, and invoices with a straightforward workflow. The Sage Pay integration enables online payments, and automatic reminders help with cash flow.
For small businesses that prefer an established brand with UK-based support, Sage is a solid choice. The invoicing is not as polished as Xero's, but it covers everything most businesses need.
Strengths: Established brand, UK support, reliable, integrated payments Weaknesses: Less modern interface, not as feature-rich as Xero for invoicing
5. Tide — Best for Invoice + Banking Combined
Price: Free basic plan | Payment links: Yes | Recurring invoices: Yes | Bank reconciliation: Yes (native)
Tide combines a business bank account with invoicing and basic accounting features. Because your banking and invoicing are in the same platform, payment reconciliation is automatic — when a customer pays, Tide matches it to the invoice instantly.
The invoicing features are more basic than dedicated platforms, but for small businesses that want the simplest possible setup — one app for banking, invoicing, and basic bookkeeping — Tide works well.
Strengths: Banking + invoicing in one app, automatic reconciliation, free plan Weaknesses: Basic invoicing features, limited accounting, you must use Tide as your bank
6. Invoice Ninja — Best Free Standalone Invoicing
Price: Free (open source) or from £8/month for pro features | Payment links: Yes | Recurring invoices: Yes | Bank reconciliation: Limited
Invoice Ninja is a free, open-source invoicing platform that handles invoice creation, expense tracking, time tracking, and payment collection. The free plan is generous — unlimited invoices, multiple payment gateways, and professional templates.
The limitation is that Invoice Ninja is primarily an invoicing tool, not a full accounting platform. You would need separate software for tax calculations, MTD submissions, and Self Assessment filing. For businesses that only need invoicing and already have accounting sorted, it is an excellent free option.
Strengths: Free and open source, unlimited invoices, multiple payment options, professional templates Weaknesses: Not a full accounting platform, limited UK-specific features
What About Accounted?
We should be transparent here. Accounted does not currently include invoicing — it is our most requested feature and is planned for a future release. Our current focus is on automated bookkeeping, receipt capture, tax management, and MTD compliance.
If invoicing is your primary need, the platforms above are better options right now. If bookkeeping and tax management are your priorities, Accounted handles those exceptionally well and you can use a separate invoicing tool in the meantime.
When we do launch invoicing, it will integrate fully with Penny's AI bookkeeping — meaning invoices will be created, tracked, and reconciled with the same automation that handles the rest of your finances. Join the waitlist to be notified when invoicing launches.
Choosing the Right Invoice Software
If invoicing is your main need
Choose Xero for the best invoicing experience, or QuickBooks for a good balance of invoicing and expense tracking. If budget is the priority, FreeAgent with NatWest is free and full-featured.
If you need invoicing plus full accounting
Xero, QuickBooks, FreeAgent, and Sage all combine invoicing with accounting, MTD compliance, and tax features. The right choice depends on your budget and whether you work with an accountant. Our best bookkeeping software guide compares the accounting features in detail.
If you want to minimise admin overall
Consider using Accounted for your bookkeeping and tax management (where Penny automates the work) alongside a simple invoicing tool like Invoice Ninja or Tide. This gives you the best of both worlds until Accounted adds native invoicing.
Key questions to ask
- How many invoices do you send per month? If fewer than 20, even entry-level plans work. If more, check for limits.
- Do your customers need to pay online? Payment links significantly speed up collection. Most paid platforms include them.
- Do you need recurring invoices? If you bill the same amount monthly, this saves significant time.
- Does your invoicing need to integrate with accounting? If so, an all-in-one platform avoids double data entry.
- Are you VAT-registered? Your invoicing software must generate VAT-compliant invoices with the correct information.
Whatever you choose, the most important thing is to invoice promptly and make paying easy. A professional invoice sent the same day you complete the work, with a clear payment link, gets paid faster than a handwritten bill sent a week later. Check our pricing page to see how Accounted handles the bookkeeping side, even while you use separate invoicing software.
See how Accounted compares to Xero, Sage, QuickBooks and more — and why sole traders are switching. See the full comparison →
Editorial & Research
The Accounted editorial team covers software comparisons, technology, and the tools UK sole traders need to run their businesses efficiently. All software comparisons are based on independent research and publicly available pricing.
Ready to try Accounted?
Join UK sole traders who are simplifying their bookkeeping and tax.
Start your 14-day free trial