SaaS Development · Professional Services

Professional Services SaaS Development

Multi-tenant practice management platforms built around time and billing, client portals, and the trust-account rules that vary by profession and jurisdiction.

Get a project estimate Talk to a developer

NDA on request · Free, no-obligation estimate · Reply within one business day

Two colleagues arranging a project plan with sticky notes on a glass wall

Product team planning at a whiteboard with laptops in a brick-walled loft

NDA before discovery

You own the code and IP on payment

Code in your repository from day one

A working demo every two weeks

Senior engineers do the work

How we work

Professional services firms, law practices, accounting firms, consultancies, and agencies, run on a mix of billable time, client trust, and document-heavy workflows that generic project management tools handle poorly. A SaaS platform built for this space has to track time against engagements, bill it correctly, and give clients a portal that does not feel like an afterthought bolted onto a spreadsheet.

We build multi-tenant platforms where each firm operates as its own tenant with configurable engagement types, billing rules, and staff roles, since a solo consultancy and a fifty-person agency need very different levels of structure from the same underlying product. Trust or retainer accounting, where funds are held on a client's behalf before being earned, needs its own ledger separate from operating revenue, matching whatever rules apply to that profession and jurisdiction.

The recurring build pattern is time capture tied to engagements, billing that supports both hourly and fixed-fee arrangements, a client portal for document sharing and invoice review, and reporting that shows a firm's partners which engagements are profitable and which are quietly losing money.

The problem

What makes professional services projects different

Time capture that staff will actually use
Billable time tracking fails when it is disconnected from daily work, so time entry needs to live inside the tools staff already use for a given engagement, not a separate form filled out at the end of the week.
Trust and retainer accounting rules that vary by profession
Client funds held in advance need to sit in a ledger separate from operating revenue, and the specific rules for when funds can be considered earned differ by profession and jurisdiction.
Mixed billing models in one system
Firms often run hourly, fixed-fee, and retainer engagements simultaneously, and a billing engine that only handles one model forces staff into manual workarounds for the others.
Client portals that reduce, not add, email volume
A portal only earns its keep if clients actually use it instead of emailing the same questions, which means document access, invoice status, and engagement updates need to be genuinely easier than email.
Profitability visibility by engagement and partner
Partners want to know which engagements are profitable in near real time, which requires time, expense, and billing data to roll up into a report without a manual month-end reconciliation.

Scope

Features we commonly build

Engagement and matter tracking
Engagements structured with scope, budget, staff assignments, and billing terms, giving a clear record of what was agreed and what has been delivered.
Time and expense capture
Time entry tied directly to engagements and tasks, with expense capture and receipt attachment for reimbursable costs.
Mixed billing engine
Support for hourly, fixed-fee, and retainer billing within the same platform, with automated invoice generation from captured time and expenses.
Trust and retainer ledgers
Client funds held on retainer tracked in a ledger separate from operating revenue, with rules for recognizing funds as earned matching the applicable jurisdiction.
Client portal
Authenticated client access to shared documents, invoice history, and engagement status, reducing status-update email traffic.
Document assembly and e-signature
Template-driven document generation for engagement letters and deliverables, with e-signature routing for client sign-off.
Profitability and utilization reporting
Dashboards showing realization, utilization, and engagement profitability by partner and practice area, drawn from time and billing data directly.

Compliance and standards

PCI DSS
GDPR
CCPA/CPRA
jurisdiction-specific trust accounting rules

Common integrations

QuickBooks
Xero
DocuSign
Microsoft 365
Stripe
Salesforce

Approach

How we run these projects

We start by mapping the firm's actual engagement and billing models, since a firm that thinks of itself as "mostly hourly" often has retainer and fixed-fee arrangements running quietly alongside, and the billing engine needs to handle all of them from the start rather than being extended piecemeal. Where trust or retainer accounting applies, we confirm the specific jurisdiction and profession rules before finalizing the ledger design.

Development proceeds with time capture and billing built first, since that is what proves the platform can replace the firm's existing tools, followed by the client portal and reporting layers. Your team owns the codebase and infrastructure from the first commit, and we test the billing engine against real historical invoices before cutting over.

Typical stack

Systems in this space

FAQ

Frequently asked questions

Can a professional services SaaS platform handle both hourly and fixed-fee billing?

Yes, we build a billing engine that supports hourly, fixed-fee, and retainer arrangements within the same platform, since most firms run more than one model at once even if they describe themselves as primarily hourly. The engine generates invoices from captured time and expenses regardless of which billing model applies to a given engagement.

What is trust or retainer accounting and does our firm need it?

Trust accounting means holding client funds paid in advance in a ledger separate from your operating revenue until the work is actually performed, and the specific rules for when funds count as earned vary by profession and jurisdiction. If your firm collects retainers before work begins, this ledger separation is worth building in from the start.

Will staff actually use a new time-tracking system, or will they keep using spreadsheets?

Adoption depends on how close time entry sits to the actual work, so we tie time capture directly to engagements and tasks inside the platform rather than requiring a separate weekly timesheet. Firms that see the biggest adoption gains are the ones where time entry takes seconds, not minutes, per entry.

How long does it take to build a professional services SaaS platform?

A focused MVP with engagement tracking, time capture, and basic billing typically takes a few months. Adding trust accounting, a client portal, or integration with an existing practice management tool extends the timeline, and we scope that during discovery rather than guessing upfront.

Can the platform integrate with our existing QuickBooks or Xero setup instead of replacing it?

Yes, most firms keep their existing accounting system for general ledger and tax purposes and use the new platform for engagement-level time, billing, and trust accounting, syncing invoice and payment data between the two. We scope the integration boundary clearly so double entry never happens on either side.