Best Invoicing Software for Small Business in 2026
The best invoicing software for most small businesses in 2026 is FreshBooks if you want built-in time tracking and light accounting alongside your invoices, Zoho Invoice if you want a genuinely free tool with no feature ceiling forcing an upgrade, and Wave if you’re a solo operator who wants invoicing and basic bookkeeping in one free product and doesn’t mind paying processing fees when a client pays by card. None of the three requires an accounting degree to set up, but they differ sharply in what happens once you outgrow a five-client side business.
Invoicing is usually one piece of a wider finance stack that also touches accounting and expenses. Our business software buying guide walks through how these pieces fit together with CRM, project management and HR tools.
Key takeaways
- Best overall FreshBooks balances invoicing with just enough accounting (expense tracking, basic reports) to satisfy a service business without needing a separate bookkeeping tool yet.
- Best free option Zoho Invoice has no paid tier at all, which is unusual in this category and makes it the obvious pick for anyone who wants zero recurring software cost.
- Best for solo operators Wave bundles invoicing and basic accounting for free, recovering its cost through payment processing fees rather than a subscription.
- Read the fine print on card fees All three charge a processing fee (roughly 2.9%-3.5%) when a client pays an invoice by card, which is easy to overlook when comparing sticker prices.
Our top picks at a glance
FreshBooks
FreshBooks is cloud invoicing and light accounting software built specifically for service-based businesses like consultants, agencies and contractors, rather than product-based sellers with inventory. Its core loop is simple: track time or expenses against a client, turn them into a professional invoice in a couple of clicks, and get paid through built-in online payment links.
What separates FreshBooks from a pure invoicing tool is that it grew accounting features around that core without turning into full double-entry bookkeeping software. Automatic expense import from a linked bank account, mileage tracking through the mobile app, and a basic profit-and-loss report mean a solo consultant can genuinely run their books here rather than exporting everything to a spreadsheet at tax time. Client-facing invoices look polished by default, and the client portal lets customers view invoice history and pay online without creating a full account, which noticeably speeds up collections for businesses that previously emailed PDF invoices.
The Lite plan caps billable clients at five, which sounds generous until an agency with more than five active clients hits the wall and has to jump to the Plus plan. FreshBooks also isn't built for inventory-based businesses; there's no stock tracking, and product-based sellers are better served by QuickBooks or Zoho Books. The introductory 50%-off promotion is worth factoring into any cost comparison, but budget for the full sticker price from around month four or five onward, since that's when most promotional pricing reverts.
Zoho Invoice
Zoho Invoice is a standalone invoicing application that handles estimates, recurring invoices, time tracking, expense tracking and a client portal, with the unusual distinction of having no paid subscription tier at all. Zoho made the entire product free in 2022, a move most competitors haven't matched, recovering the cost through its own payment gateway options and by using Invoice as an entry point into the broader Zoho ecosystem (Zoho Books, Zoho CRM, and so on).
For a small business, the appeal is straightforward: every feature is available from day one with no usage cap pushing you toward an upgrade prompt, which is a genuine departure from how most SaaS invoicing tools are structured. Multi-currency invoicing is included free, which matters for a UK business billing international clients, and the client portal supports multiple payment gateways so customers aren't locked into one processor.
The tradeoff is that Zoho Invoice is deliberately scoped to invoicing and doesn't attempt to be an accounting system. There's no general ledger, no chart of accounts, and no bank reconciliation, so a business that needs real bookkeeping will eventually need Zoho Books or a separate accounting tool alongside it. Support is also lighter than a paid product; you're routed through Zoho's shared support channels rather than a dedicated account team, which is a reasonable tradeoff for a genuinely free tool but worth knowing going in.
Wave
Wave is free invoicing and accounting software aimed squarely at freelancers, sole traders and very small businesses that need to send professional invoices and track income and expenses without paying a monthly subscription. Its business model is unusual for the category: instead of charging for software access, Wave earns revenue from payment processing fees when a client pays an invoice by card, plus optional paid add-ons for bookkeeping support and payroll.
The core product covers invoicing, unlimited estimates, basic double-entry accounting and receipt scanning through the mobile app, all genuinely free with no feature paywall for a single user. For a sole trader with a handful of clients who mostly gets paid by bank transfer rather than card, the total cost of running Wave can be effectively zero, which is hard for any subscription competitor to beat on price alone.
Because Wave's revenue comes from transaction fees, the economics shift for a business that gets paid by card frequently; the per-transaction fee adds up faster than a flat monthly subscription once volume climbs, so a business invoicing tens of thousands of pounds a month by card should run the actual math rather than assuming free means cheapest. Wave has also scaled back new feature development in recent years compared to venture-funded competitors, and its mobile app and reporting are noticeably less polished than FreshBooks'. It remains a solid starting point, not necessarily where a growing five- or ten-person business should still be a year or two later.
|
Best Overall
FreshBooks
|
Best Free Option
Zoho Invoice
|
Best for Solo Operators
Wave
|
|
|---|---|---|---|
| Time tracking built in | Yes | Yes | No |
| Bank reconciliation / bookkeeping | Yes | No | Yes |
| Client portal | Yes | Yes | No |
| Revenue model | Subscription | Free, cross-sell | Free, transaction fees |
| Best for | Service businesses wanting light accounting | Anyone wanting zero software cost | Solo traders paid mostly by bank transfer |
| Check Price | Check Price | Check Price |
What to look for in invoicing software
How quickly the tool lets a client actually pay, not just view, the invoice.
The subscription price is only part of the cost; card processing fees on a free or cheap tool can exceed a paid competitor’s subscription at volume.
Several tools in this category cap the number of billable clients or invoices on their entry-level tier.
Relevant for any UK business billing clients outside the UK.
Whether the tool can handle basic bookkeeping later, or whether you’ll need a second product.
Frequently asked questions
Is Zoho Invoice actually free, or is there a hidden catch?
Zoho Invoice’s core product genuinely has no subscription fee and no feature paywall as of this writing. Zoho recovers the cost by using it as an entry point into its wider suite of paid products and through optional payment gateway integrations, not by limiting the invoicing features themselves.
What's the difference between invoicing software and accounting software?
Invoicing software focuses on creating, sending and getting paid on invoices. Accounting software adds double-entry bookkeeping, a general ledger, bank reconciliation and tax-ready financial statements. FreshBooks and Wave include a basic accounting layer on top of invoicing; Zoho Invoice deliberately does not, and pairs with Zoho Books for that.
How much do card payment fees typically cost on these tools?
Card processing fees across FreshBooks, Wave and Zoho Invoice’s integrated gateways generally fall in the 2.9%-3.5% plus a small fixed fee per transaction range, though exact rates vary by processor, card type and country. Always check the current rate on the specific payment gateway you’ll actually use before committing.
Can I send invoices in GBP if the software is priced in USD?
Yes. FreshBooks and Wave both let you issue client-facing invoices in GBP regardless of which currency your own subscription is billed in, and Zoho Invoice supports GBP invoicing natively since it has no billing currency of its own to consider.
Final verdict
- FreshBooks: best overall for service businesses needing light accounting alongside invoicing.
- Zoho Invoice: best free option with no feature ceiling.
- Wave: best for solo operators paid mostly by bank transfer rather than card.
FreshBooks is the strongest all-rounder for a service business that wants invoicing plus enough light accounting to avoid a second tool early on. Zoho Invoice is the obvious choice for anyone unwilling to pay a subscription at all. Wave suits a solo trader who is paid mostly by bank transfer and wants free invoicing with basic bookkeeping attached.
