Best ERP for Professional Services (2026): PSA vs ERP for Consulting, Agencies and SaaS

The best ERP for professional services is the one that gets approved time onto invoices and into revenue without anyone retyping it. For firms above roughly 100 people or with several entities, that usually means NetSuite with SuiteProjects, Sage Intacct paired with a PSA such as Kantata, or Certinia for firms already on Salesforce; smaller consulting firms and agencies are often better served by a PSA such as Scoro or Productive connected to QuickBooks or Xero.

We build time tracking, project and billing systems and integrate them with accounting packages, and OSKI runs its own team on a time, leave and pay platform we built. So this guide looks at each option through the data that actually moves: hours, rates, invoices and revenue schedules. Prices are list prices from vendor pages as of November 2026; quote-only vendors are marked as such.

Quick picks

Take the fit check before you compare features. It shows whether you need a suite, a PSA connected to your accounting, or a custom layer for time and billing.

PSA vs ERP: what each one should own

Professional services firms sell time and expertise, so the data model is different from a product company’s. There is little inventory; instead there are people, rates, projects, contracts and revenue schedules.

• A PSA owns delivery: projects and tasks, time and expense entry, approvals, resource scheduling, utilization and project budgets. Billing often starts here because the PSA knows what was delivered.
• An ERP owns finance: general ledger, receivables and payables, revenue recognition, multi-entity consolidation and the reports your auditors read.

Small firms can run both jobs in one PSA plus QuickBooks or Xero. Larger firms need both systems, and the integration between them is where most problems show up.

What matters from an integration and data point of view

1. One source of truth for time. Time should be entered once, approved once and flow to billing and payroll from the same record. Two trackers, one for clients and one for pay, will drift.
2. Rate cards and their history. Rates change by client, role, contract and date. The system that prices time must keep rate history, or re-running last quarter’s invoice gives a different number.
3. Utilization definitions. “Billable hours divided by available hours” depends on how you count leave, holidays, internal projects and partial weeks. Make sure leave data reaches the system that calculates utilization.
4. Write-offs and change orders. Billed time is rarely equal to logged time. Check where write-downs live and whether they flow back to project profitability.
5. Revenue recognition. Fixed-fee projects, milestones, retainers and subscriptions are recognized differently from time and materials. For SaaS and subscription businesses, ASC 606 schedules are a reason on their own to pick a specific ERP.
6. CRM handoff. A won deal should create the project, budget and contract terms without retyping. If sales lives in HubSpot or Salesforce, that sync matters as much as the ERP itself.

The shortlist in depth

NetSuite with SuiteProjects: best for ERP and PSA from one vendor

Fits: growing consultancies, IT services and SaaS companies with several entities that want one vendor for finance and project operations.

Strengths: NetSuite’s ERP includes project features, and Oracle also sells SuiteProjects Pro, the former OpenAir, which its documentation describes as a complete PSA solution. Oracle’s help docs describe a sync between SuiteProjects Pro and NetSuite financials, so project data appears in NetSuite. SuiteBilling and Advanced Revenue Management handle subscription billing and ASC 606 schedules.

Limits: SuiteProjects Pro is a separate application with its own setup, so “one vendor” does not mean one database. Licensing is built from a base fee, users and modules, and the total adds up fast for a small firm.

Pricing: quote-based. Third-party buyer guides estimate a base fee near $999 per month and full users around $99 to $129 per month before modules; treat these as estimates.

Integration note: NetSuite limits concurrent API calls by account tier, so time imports from an outside tracker should be batched and queued.

Sage Intacct: best finance-first choice, especially for SaaS

Fits: firms where the CFO drives the decision, including SaaS and subscription companies, nonprofits and multi-entity consultancies.

Strengths: Sage states that Intacct supports ASC 606 and IFRS 15 natively with automated revenue recognition, and offers contract and subscription billing as one system of record for billings, revenue and cash. Project accounting covers time and expense, project costing and billing. Dimensions make profitability reporting by client, project or practice straightforward.

Limits: Intacct is accounting software at heart, not a resourcing tool. Firms that need scheduling and utilization management usually add a PSA, such as Kantata, which announced an Intacct integration that syncs projects, receivables, payables and revenue.

Pricing: quote-based, built from user types and modules.

Integration note: its web services API is mature, and the main design job is deciding whether time is approved in the PSA or in Intacct, never both.

Certinia: best for firms already running on Salesforce

Fits: mid-sized and large services firms whose sales team lives in Salesforce and who want delivery and finance on the same platform.

Strengths: Certinia, formerly FinancialForce, runs PSA and financials natively on Salesforce, so opportunities, projects, resources and billing share one data model and one security model. No sync between CRM and PSA is needed.

Limits: you pay for Certinia and for the Salesforce licenses underneath, and both have annual commitments. Configuration needs Salesforce admin skills.

Pricing: quote-based. Certinia says it prices per user through bundles or a la carte licenses. Third-party purchase data shows a median buyer spend of about $68,000 per year, which gives a sense of scale rather than a list price.

Kantata: best dedicated PSA beside an ERP

Fits: consultancies, agencies and IT services firms with 50 or more consultants, where resource planning and utilization are the core management problem.

Strengths: strong resource management, capacity forecasting and project financials. Kantata’s integrations page lists NetSuite, Sage, QuickBooks, Xero, Salesforce and HubSpot, among others.

Limits: it is not an ERP, so you still need accounting, and the integration is where time and revenue have to agree. Kantata’s pricing page says plans are tailored, so you will need a sales cycle to get a number.

Pricing: quote-based.

Microsoft Dynamics 365 Business Central: best for Microsoft shops

Fits: 10 to 200 person firms on Microsoft 365 that want one ERP for finance and projects.

Strengths: partner and reseller licensing guides consistently place jobs, resources, capacity, job costing and timesheets in the Essentials license. Team Members licenses at $8 per user per month cover staff who mostly read data, approve workflows and enter time, which keeps the cost down for large delivery teams.

Limits: resource planning and utilization reporting are basic compared with a dedicated PSA. Many firms add a PSA or a partner extension.

Pricing: Essentials $80 and Premium $110 per user per month, paid yearly, and Team Members $8, according to Microsoft’s pricing page.

Integration note: Business Central’s REST APIs and AL extensions make it easy to feed approved time from an external tracker.

Scoro: best all-in-one for agencies and consultancies

Fits: 5 to 100 person agencies and consultancies that want quotes, projects, time, resourcing and invoicing in one tool.

Strengths: Scoro’s pricing page lets you combine modules: Time-billing at $17, Projects and Resources or Quote to Cash at $29, and End-to-end at $82 per user per month. It lists Xero, QuickBooks and Sage Intacct among its accounting integrations.

Limits: a 5-seat minimum, and some integrations are paid extras. It is not a general ledger, so accounting stays in QuickBooks, Xero or an ERP.

Pricing: $17 to $82 per user per month, 5-seat minimum, with a 13% to 17% discount on annual billing, according to Scoro.

Productive: best lean option for agencies

Fits: creative, digital and development agencies that care most about budgets, time and resource planning.

Strengths: time tracking, budgeting and resource planning are included from the Essential plan. Revenue forecasting sits on the top plan.

Limits: Productive’s page does not clearly map invoicing and accounting integrations to plans, so confirm which tier syncs with your QuickBooks or Xero.

Pricing: Essential $10 and Professional $29 per user per month on monthly billing, with Ultimate by quote, according to Productive’s pricing page.

Comparison at a glance

These rows summarize vendor documentation and partner guides. Test the ones that drive your decision.

What it costs over three years

For a professional services firm, license fees scale with headcount, so the choice between full seats and light time-entry seats matters more than the headline rate. The calculator below uses list prices where published; adjust setup and upkeep to your quotes.

When a custom layer is the better answer

Buy a PSA or a services ERP when your firm bills the way the software expects: time and materials, fixed fees, milestones or standard subscriptions. That covers most firms, and vendors have spent years on edge cases you have not met yet.

A custom layer earns its keep when time does more than one job:

• Time drives pay as well as invoices. Contractors and staff paid from logged hours need overlap checks, leave and pay rules in the same records. That is why OSKI built OSKI Time & CRM for its own team rather than stitching a tracker, a leave spreadsheet and a payroll file together.
• Client contracts carry their own billing rules, such as caps, blended rates, retainers that roll over, or approvals in the client’s portal.
• Your delivery runs in your own product, for example a SaaS platform where usage and service hours bill together.

The sensible design keeps accounting in QuickBooks, Xero or your ERP and builds only the layer for time, rates and billing logic. Our guide to a reliable two-way QuickBooks sync covers how to connect that layer safely.

Before you sign: a checklist

Ask for a sandbox and run these tests with real data:

1. Log a week of time for five people across three projects, including one non-billable project and a holiday. Does utilization come out the way your managers calculate it?
2. Change a rate halfway through a project. Does the next invoice use the right rate for each day?
3. Write off two hours on an invoice. Does project profitability reflect the write-off?
4. Bill a fixed-fee project at 40% complete. Does revenue match what your accountant expects?
5. For SaaS: create a 12-month subscription with an implementation fee and an upgrade in month four. Inspect the revenue schedule.
6. Win a deal in your CRM. Does a project with budget and rates appear without retyping?
7. Export a year of time entries with project, rate and invoice IDs. Could you leave if you had to?

Where OSKI fits

OSKI is a software engineering company, not a reseller, so we do not earn a commission on any product above. We help with integrations between a PSA, a CRM and your accounting system, custom ERP development when time, pay and billing rules need a system of their own, and CRM development when the handoff from sales to delivery is the weak point. Tell us how your firm bills and what it runs today, and we will tell you which path fits and roughly what it costs.