Accounting Firm Software

Engagements On Time. Clients Informed.

Tax deadlines and audit deliverables do not wait for disorganized engagement tracking. OptiServe AI gives CPA firms a central engagement calendar, client document portal, staff utilization tracking, and automated billing so your team hits every deadline without heroic last-minute scrambles.

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30-day free trial  |  No credit card required  |  Cancel anytime

96%
on-time engagement delivery rate on the platform
2.7×
faster client document collection with the client portal
1,400+
accounting firms and CPA practices on the platform

Built for the accounting firm that bills by the hour and the engagement

Engagement tracking, client portals, staff utilization, deadlines, and billing — all in one place.

📅

Engagement Calendar & Deadline Tracking

Log every tax return, audit, review, and compilation with due dates, extensions, and responsible staff. Deadline alerts go to the staff member and manager — never discover a missed deadline at 11 PM.

📁

Client Document Portal

Clients upload W-2s, 1099s, bank statements, and prior returns through a branded portal. Documents land in the right engagement folder automatically — end the email attachment archaeology.

⏱️

Staff Time & Utilization Tracking

Staff log billable and non-billable time by engagement and task. Utilization dashboards show hours worked, hours billed, and realization rate — without a separate time tracking system.

📋

Engagement Letter & Retainer Workflow

Generate and send engagement letters for e-signature. Track signed vs. unsigned letters and retainer deposits before work begins. Compliance with AICPA practice standards starts here.

💳

Progress & Fixed-Fee Billing

Invoice by hourly, progress, or fixed-fee arrangement per engagement. Billing exports to QuickBooks Online. Track WIP, unbilled time, and AR aging per client from one dashboard.

📊

Practice Profitability Reports

See revenue per service line, average fee per engagement, staff efficiency, and client profitability rankings. Know which engagements and client relationships drive your firm's margin.

CPA firm operations at the industry's most accessible price

Solo practitioners to small firms — no per-staff seat fees.

Starter
$59/mo

For solo CPAs and bookkeepers managing fewer than 100 active clients.

  • Engagement pipeline & dashboard
  • Basic deadline tracking
  • Client & engagement records
  • Online invoicing & payment
  • Basic staff scheduling
  • AI assistant for client inquiries
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Business
$139/mo

For established CPA firms with audit, tax, and advisory divisions.

  • Everything in Professional
  • Progress & fixed-fee billing
  • Practice profitability reports
  • GPS timesheets & staff geofencing
  • AR aging & WIP reports
  • Profit protection alerts
Get Started
Enterprise
Custom

For large multi-office accounting firms needing custom integrations and white-label portals.

  • Everything in Business
  • White-label client portal
  • Custom practice management integrations
  • Multi-office engagement management
  • Dedicated onboarding specialist
  • Priority SLA support
Contact Sales

All plans include a 30-day free trial. No credit card required.

CPA firms that hit every deadline and collect faster

Tax practices, audit firms, and full-service CPA firms.

★★★★★

"The client document portal cut the time my team spends requesting documents from 12 hours per tax season to under 2. Clients upload everything in one place and we know exactly what is missing."

H
Helen C.
Managing CPA, Clearwater Tax & Advisory — Phoenix, AZ
★★★★★

"Engagement deadline alerts caught two extension deadlines that my team nearly missed during a particularly heavy April. The system flagged them five days out. We filed with time to spare."

D
Douglas W.
Partner, Westbrook CPA Group — Charlotte, NC
★★★★★

"Practice profitability reports showed us that three of our largest clients by revenue were actually our lowest-margin engagements. We renegotiated fees and recovered $28,000 in annual margin."

I
Irene L.
Firm Administrator, Langley & Associates CPAs — Seattle, WA

Accounting firm software questions

Yes. The client portal supports file uploads up to 2 GB per file. For exceptionally large files, contact support about secure transfer options.
Engagement letters are generated from templates you configure. They capture scope, fee, term, and client responsibilities. The client signs electronically and the signed letter is permanently attached to the engagement record.
Yes. Each engagement specifies billing type: hourly, fixed-fee, or retainer. Staff log time regardless of billing type. For fixed-fee engagements, time tracking provides internal cost data without generating billable line items on the invoice.
Yes. Each tax engagement has fields for original deadline, extension filed date, and extended deadline. Extension status (not filed, filed, approved) is tracked per engagement and surfaces on the deadline calendar.
WIP (work in process) shows time that has been logged but not yet billed. You see WIP by engagement, by client, and by staff member. When you generate an invoice, WIP converts to billed. Unbilled WIP ages daily on the report.
Yes. Stripe ACH bank transfer is supported on all plans. Clients connect their bank account once and can pay all future invoices via ACH. ACH processing fees are lower than card rates.

Every deadline met. Every client document collected. Every invoice paid.

Get your engagement calendar, client portal, and billing running before the next season opens.

30 days free  |  Setup in under 10 minutes  |  Cancel anytime