Best Accounting Software for Consulting Firms in 2026
Most accounting software reviews are written for retail businesses and freelancers. Consulting firms have completely different needs — project-based billing, retainer management, multi-currency invoicing, and professional services reporting. We reviewed the top platforms through that specific lens.
Accounting software for a consulting firm needs to do things that most consumer reviews never mention. You need to bill clients by project and by retainer simultaneously. You need to track time against engagements, generate professional invoices in minutes, and produce reports that show profitability by client — not just overall revenue.
Most platforms are built for product-based businesses or freelancers. Consulting firms occupy a middle ground that only a handful of platforms serve well. Our advisory team has used and recommended accounting tools to consulting clients across North America — this review reflects that practical experience.
Quick Comparison — Accounting Software for Consulting
| Platform | Best For | Starting Price | Project Billing | Score |
|---|---|---|---|---|
| FreshBooks | Small–mid consulting firms | $17/mo | ✓ Excellent | 9.2/10 |
| QuickBooks Online | Mid–large firms | $30/mo | ✓ Good | 8.8/10 |
| Xero | International firms | $15/mo | ✓ Good | 8.4/10 |
| Wave | Solo consultants | Free | ✗ Limited | 7.0/10 |
1. FreshBooks — Best for Small to Mid-Size Consulting Firms
- Best invoicing experience for service businesses
- Built-in time tracking linked directly to invoices
- Excellent client portal — clients pay themselves
- Automatic payment reminders and late fees
- Project profitability reporting built in
- Outstanding mobile app for on-the-go billing
- More limited than QuickBooks for complex accounting
- Payroll requires add-on (via Gusto)
- Inventory management not applicable for consultants
- Advanced reporting requires higher tier
2. QuickBooks Online — Best for Larger Firms With Complex Financials
- Most comprehensive financial reporting available
- Universal accountant compatibility
- Best payroll integration in the market
- Extensive third-party app integrations
- Strong cash flow forecasting tools
- More complex than consulting firms typically need
- Invoicing experience less elegant than FreshBooks
- Can be overwhelming for small teams
- Price increases significantly at higher tiers
3. Xero — Best for International Consulting Firms
- Unlimited users at every pricing tier
- Best multi-currency support in its class
- Clean, intuitive interface
- Strong bank reconciliation tools
- Good project tracking at higher tiers
- Time tracking requires third-party integration
- Less accountant adoption in North America vs QuickBooks
- Payroll limited to certain regions
- Customer support less responsive than competitors
What Consulting Firms Should Look for in Accounting Software
The requirements for a consulting firm are fundamentally different from a product-based business. Here is what actually matters:
1. Project-based invoicing
You need to bill by project, by milestone, and by retainer — often simultaneously. Look for platforms that let you create invoices directly from project time and expense records rather than building them manually from scratch every time.
2. Time tracking integration
If any of your billing is time-based, built-in time tracking is essential. The ability to log billable hours against a client and convert them to an invoice in one click eliminates a major administrative burden.
3. Professional invoice design
Your invoice is a client touchpoint. Consulting firms should be sending clean, branded, professional invoices — not generic spreadsheet-style documents. FreshBooks and Xero both produce excellent-looking invoices out of the box.
4. Multi-currency support
If you have any international clients, multi-currency invoicing is non-negotiable. Xero handles this best at the mid-market price point. QuickBooks Online also supports multi-currency on higher tiers.
5. Accountant access
Your external accountant needs to access your books easily. QuickBooks is the standard — most accountants in North America use it daily and can work in your account without any onboarding. FreshBooks and Xero also support accountant access, but with a smaller user base among accounting professionals.
Our Verdict
FreshBooks for most consulting firms — QuickBooks for larger firms with complex needs
For consulting firms up to 20 staff billing on a project and retainer basis, FreshBooks is the right choice. The invoicing experience, built-in time tracking, and client portal are purpose-built for exactly how consulting firms operate. The learning curve is minimal and the quality of the output — professional invoices that clients actually pay — is excellent.
Choose QuickBooks Online if your firm is larger, has complex payroll requirements, or if your accountant specifically requests it. Choose Xero if you bill internationally in multiple currencies or if team size makes per-user pricing prohibitive.
Frequently Asked Questions
Can these platforms handle retainer billing automatically?
Yes — all three platforms support recurring invoices for retainer clients. FreshBooks handles this particularly elegantly — you set up the retainer once and it auto-generates and sends invoices on your chosen schedule.
Do I need accounting software if I already have a bookkeeper?
Yes — your bookkeeper needs a platform to work in. Most bookkeepers in North America prefer QuickBooks Online. If your bookkeeper has a preference, defer to them on platform choice since they will be the primary user.
Can FreshBooks handle GST/HST or VAT for Canadian and international clients?
Yes — FreshBooks supports multi-tax configurations including GST/HST for Canadian consulting firms and VAT for UK/EU clients. You set up your tax rates once and they apply automatically to relevant invoices.
Is there a free accounting option for solo consultants just starting out?
Wave Accounting offers a genuinely free plan that covers basic invoicing and accounting for solo consultants. It lacks the project billing features of paid platforms but is a legitimate starting point before you have consistent revenue to justify a subscription.
Ready to Upgrade Your Consulting Firm’s Accounting?
Start with FreshBooks — the platform purpose-built for exactly how consulting firms bill. Try it free for 30 days with no credit card required.