Accounting Software for Agencies and Consultancies: 9 Best Picks for Project-Based Billing in 2026

Accounting software for agencies and consultancies has to solve a problem that generic small business tools were never really built for: tracking money that’s tied to projects, retainers, and billable hours instead of straightforward product sales. If you run a marketing agency, a design studio, or a consulting practice, you already know that the standard version of “how much did we make this month” isn’t good enough. You need to know which clients are actually profitable, which retainers are underpriced, and where your team’s time is quietly disappearing.

Most off-the-shelf accounting tools can log an invoice and reconcile a bank feed just fine. Far fewer can tell you that Client A is eating 30% of your team’s hours while paying for 15%, or that a project ran over budget three weeks before it actually finished. That’s the gap this guide is trying to close.

We looked at platforms ranging from familiar small-business tools like QuickBooks and Xero, which work well for smaller shops, up through project-centric systems like Sage Intacct, NetSuite, and Deltek Vantagepoint, which are built specifically for firms billing by the hour or the engagement. Below are nine solid options for agencies and consultancies, what each one actually does well, who it fits, and where it tends to fall short. By the end, you should have a much shorter list to actually test.

What Makes Accounting Software Right for Agencies and Consultancies

Before getting into specific platforms, it’s worth being clear about what separates agency accounting software from a general small-business tool. Agencies and consultancies typically need most of the following:

• Project-based accounting that ties revenue and cost to a specific client or engagement, not just a general ledger category
• Time tracking and billable hours that flow directly into invoices without manual re-entry
• Retainer billing for clients who pay a flat monthly fee regardless of hours worked that month
• Project profitability reporting so you can see margin by client, not just company-wide revenue
• Multi-currency or multi-entity support if you work with international clients or run more than one legal entity
• Integration with time-tracking or project management tools your team already uses, like Harvest, Asana, or Monday

A tool that’s missing most of these will usually leave your team reconciling numbers in a spreadsheet anyway, which defeats the purpose of paying for software in the first place.

1. QuickBooks Online

QuickBooks Online is the most widely used option among small and mid-sized agencies, largely because of how many bookkeepers and accountants already know it. Its Plus and Advanced tiers add project profitability tracking, letting you tag income and expenses to a specific client or job and see margin at a glance.

Pricing runs from $38 per month for Simple Start up through $140 for Plus and $340 for Advanced, following the price increase Intuit rolled out in August 2026. Time tracking is built in on Plus and above, and billable hours can be pulled directly into client invoices.

Best for: Agencies that need solid project profitability reporting without moving to a full ERP system.

Strengths:

• Deep bench of certified bookkeepers and accountants familiar with the platform
• Project profitability dashboards on Plus and Advanced plans
• Strong third-party integration library, including most popular time-tracking and CRM tools

Watch out for: The learning curve on advanced reporting features can be steeper than the interface suggests, and per-user pricing on lower tiers can get expensive as your team grows.

2. Xero

Xero takes a different approach from QuickBooks by including unlimited users on every plan, which matters a lot for agencies where account managers, project leads, and finance staff all need visibility into client budgets. Its project tracking add-on lets you quote, track, and invoice project work with reasonable granularity.

Plans generally run from around $25 to $90 per month, with project tracking available as part of the Established plan or as an add-on depending on region.

Best for: Agencies with several people who need financial visibility but don’t want to pay per seat for it.

Strengths:

• Unlimited users on every tier, useful for larger creative or consulting teams
• Clean project tracking with budgets versus actuals
• Strong multi-currency support for agencies with overseas clients

Watch out for: Project features are less deep than what a dedicated professional services tool offers, so larger consultancies may outgrow it.

3. FreshBooks

FreshBooks was built with service businesses in mind from day one, which shows in how naturally it handles time tracking, retainers, and client-facing invoices. For smaller consultancies and solo practitioners, it often requires the least setup of anything on this list.

Pricing starts around $19 per month for the Lite plan, moving up through Plus and Premium tiers that add more clients and team member access.

Best for: Solo consultants and small agencies that bill primarily by the hour and want polished, professional invoices without a complicated setup.

Strengths:

• One-click time tracking tied directly to client billing
• Retainer and recurring invoice support out of the box
• Client-friendly invoice templates that make agencies look more established

Watch out for: Reporting depth is noticeably lighter than QuickBooks or Xero once you have more than a handful of active clients or projects.

4. Zoho Books

Zoho Books stands out for agencies that already run other parts of their operation on Zoho’s ecosystem, since it connects natively with Zoho CRM, Zoho Projects, and Zoho Inventory. That combination effectively gives smaller consultancies a mini-ERP without the enterprise price tag.

Pricing starts free for very small businesses under a revenue threshold, with paid plans from around $20 per month scaling up through higher tiers with more automation and multi-currency support.

Best for: Agencies already using Zoho tools for CRM or project management who want their finances connected to the same system.

Strengths:

• Native integration across the Zoho product suite
• Client portal for retainer and project invoice visibility
• Competitive pricing at every tier compared to QuickBooks and Xero

Watch out for: Outside the Zoho ecosystem, the integration advantage disappears, so it’s a much less obvious pick for agencies on other platforms.

5. Sage Intacct

Sage Intacct is where this list starts moving from small-business tools into genuine project accounting systems. It’s built for finance teams that need to track revenue recognition, project budgets, and multi-entity consolidation with real precision, which matters once a consultancy grows past a certain size.

Pricing is quote-based and typically starts in the low thousands per year depending on modules and users, putting it well above the small-business tools above.

Best for: Growing consultancies and professional services firms that need dimensional reporting across projects, departments, and locations.

Strengths:

• Purpose-built revenue recognition for project and retainer-based billing
• Strong multi-entity and multi-currency consolidation
• Detailed project profitability and utilization reporting

Watch out for: Implementation typically requires a partner or consultant, and it’s overkill for a firm under roughly 20 people.

6. NetSuite

NetSuite, owned by Oracle, is a full ERP platform rather than a standalone accounting tool, which makes it a serious option for larger consultancies and agencies operating across multiple subsidiaries or countries. Its project accounting module ties time, expenses, and billing together with real-time visibility for finance leadership.

Pricing is custom and generally starts around $1,000 per month or more, scaling with modules and user count.

Best for: Larger agencies or consultancies with complex, multi-entity structures that have outgrown small-business accounting software entirely.

Strengths:

• Real-time financials across departments, subsidiaries, and currencies
• Built-in project management and resource allocation tools
• Scales well as headcount and complexity grow

Watch out for: Cost and implementation complexity make it a poor fit for smaller shops that don’t need enterprise-grade infrastructure yet.

7. BigTime

BigTime was built specifically for professional services firms, which puts it closer to a project and resource management tool with strong accounting integration than a traditional general ledger system. It’s particularly well suited to consultancies that need to track staff utilization alongside project financials.

Pricing typically starts around $10 to $20 per user per month depending on the plan, with more advanced project and resource planning features on higher tiers.

Best for: Consulting firms that care as much about staff utilization and capacity planning as they do about invoicing.

Strengths:

• Detailed utilization tracking by staff member and role
• Strong project budgeting tied to time and expense entries
• Integrates with QuickBooks and other accounting platforms rather than replacing them

Watch out for: It’s not a full accounting system on its own for most firms, so you’ll likely still need QuickBooks or a similar tool underneath it.

8. Certinia (formerly FinancialForce)

Certinia runs natively on Salesforce, which makes it a strong fit for consultancies and agencies that already manage their client relationships and sales pipeline there. Because it shares a platform with your CRM, project and billing data can stay connected to the sales process from the very first proposal.

Pricing is quote-based, generally aimed at mid-market and larger professional services organizations.

Best for: Agencies and consultancies already standardized on Salesforce that want project accounting connected directly to their CRM data.

Strengths:

• Native Salesforce integration eliminates duplicate client and deal data
• Strong project and resource management built for services businesses
• Detailed revenue recognition for complex, multi-phase engagements

Watch out for: It only makes sense if you’re already committed to Salesforce, since standing it up elsewhere adds unnecessary cost and complexity.

9. Deltek Vantagepoint

Deltek Vantagepoint is aimed squarely at architecture, engineering, and similar project-heavy consultancies, with project accounting features built around the specific billing structures those industries use, including percent-complete and unit-based billing.

Pricing is quote-based and generally scales with firm size and number of users.

Best for: Architecture, engineering, and similarly regulated consultancies with complex project billing and compliance requirements.

Strengths:

• Purpose-built for A&E firm billing methods and project structures
• Strong compliance and reporting features for government or regulated contracts
• Deep project cost tracking down to task-level detail

Watch out for: It’s a specialized fit, so general marketing or creative agencies will likely find it more rigid than they need.

How to Choose Between These Options

With nine platforms on the table, the right pick usually comes down to a few practical factors:

1. Firm size and complexity. Solo consultants and small agencies are usually well served by FreshBooks or QuickBooks. Firms with 50 or more staff, multiple entities, or complex billing arrangements should look at Sage Intacct, NetSuite, or Deltek Vantagepoint.
2. Billing model. If most of your revenue comes from retainers, prioritize platforms with strong recurring invoice support. If it’s mostly hourly or project-based work, prioritize time tracking and project profitability reporting instead.
3. Existing tech stack. Already using Salesforce or Zoho for CRM and project management? Certinia or Zoho Books will likely require less duplicate data entry than starting fresh elsewhere.
4. Industry-specific needs. Architecture and engineering firms in particular tend to need billing structures that general accounting software doesn’t support well, which is where Deltek Vantagepoint earns its keep.
5. Budget for implementation, not just software. The enterprise-grade options on this list, Sage Intacct, NetSuite, and Certinia, typically require a paid implementation partner, so factor that into your total cost before committing.

For agencies handling client funds or trust accounts, it’s also worth reviewing recordkeeping expectations directly from the IRS small business recordkeeping guidance, since project-based invoicing can complicate what counts as reportable income in a given tax year. And if your consultancy handles sensitive client financial data as part of engagements, the FTC’s data security guidance for small businesses is a reasonable baseline to check any accounting platform against before rolling it out firm-wide.

Conclusion

The right accounting software for agencies and consultancies depends far more on your billing model and firm size than on any single feature list. QuickBooks Online and Xero remain solid, affordable choices for smaller agencies that need decent project tracking without a steep learning curve, FreshBooks and Zoho Books work well for solo consultants and small teams focused on invoicing and retainers, and Sage Intacct, NetSuite, Certinia, and Deltek Vantagepoint step in once a firm’s size, industry, or billing complexity outgrows what small-business tools can handle. Rather than picking based on brand recognition alone, match the platform to how your firm actually bills clients and tracks project profitability, and test it against a real project before rolling it out across the whole team.