ACCOUNTING SOFTWARE

Project management, time tracking, and invoicing designed for accounting firms

Track engagements, log hours, and bill every client accurately without switching tools, so your firm sees unbilled WIP before it ages.

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Active Accounting Clients 370
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Built for Accounting Performance

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Price engagements accurately, protect realization, and keep staff from unpaid overtime.

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Align partners, managers, and staff on one source of truth for hours, budgets, and capacity, from tax season to year-end.

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See how every engagement is tracking against its budget and fee, and catch write-downs before they happen.

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Close every engagement on schedule. With full visibility into deadlines, workloads, and WIP, busy season stops being a guessing game.

Real Outcomes From Teams Like Yours

Everything You Need to Run Accounting Engagements

Don’t force your firm into a tax-only point solution or an ERP you’ll never fully use.
Get time, billing, and engagement management today, with room to add depth as you grow.

Creating Assignments
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Mobile time tracking

Log hours from anywhere, so no billable minute goes missing.

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Engagement budgets

Budget every engagement and track actuals against the fee.

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Flexible billing models

Bill hourly, fixed fee, retainer, or a custom model per client.

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Bulk invoicing

Generate client invoices in one run instead of one by one.

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Unbilled WIP visibility

See unbilled time and expenses on your dashboard, not in a report.

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Staff capacity planning

Balance staff workloads and see who’s free before busy season.

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Cost rate tracking

Set standard or variable cost rates to see true engagement margin.

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Accounting integration

Sync time and invoices with QuickBooks or Sage Intacct both ways.

A Single Platform For Your
Whole Engagement Lifecycle

BigTime is built for accounting firms that need more than time entry and a ledger.

⏱️Reduce admin time
📈 Increase utilization
💸 Lower DSO
🛡️ Clear unbilled WIP
📊 Save reporting time
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The Accounting Workflow, Simplified

From engagement letter to payment, BigTime helps firms like yours bill accurately, protect margin, and grow confidently.

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Integrated Quoting

Scope engagements with fees based on past actuals, then convert accepted quotes straight into budgets and plans.

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Cost-Effective Staffing

Plan staff capacity across every engagement. Match the right people to the work and keep busy season overtime in check.

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Automated Invoicing

Send accurate invoices in bulk or one by one, built around each client’s billing terms, without manual re-entry.

Works With the Tools 
You Already Use

BigTime connects with QuickBooks, Sage Intacct, Lacerte, Salesforce, and more, plus open API access to fit the way your firm works.

Empower Every Member of Your Team

Help your entire firm do its best work, from seasonal staff to the partners who sign off.

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Practice Manager

  • Build real-time dashboards for realization, utilization, and WIP
  • Replace spreadsheet tracking and month-end reconciliation with one system
  • Set rates and protect engagement margin
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Engagement Partners

  • Catch scope creep before it turns into a write-down
  • View progress by engagement, staff member, and client
  • Review and approve time without chasing timesheets
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Staff Accountants

  • See deadlines and budgets for every engagement
  • Log hours easily, from anywhere
  • Track time and expenses on a simple platform, even in busy season
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Recognized by industry leaders

G2 Leader 2025
G2 Mid Market Leader Winter 2025
G2 Momentum Leader Winter 2025
G2 Best Software Top 50

Frequently Asked Questions 

What makes BigTime the right choice for accounting firms?

BigTime is purpose-built to give accounting firms everything they need to scope engagements, track time, manage staff capacity, and bill clients accurately. Unlike tax-only or generic project management software, BigTime combines engagement budgets, billing, and reporting on one platform, with financial visibility built in at every level, from unbilled WIP to margin by client. BigTime is the best fit for growing firms that need more than spreadsheets and a ledger, but not the weight of a traditional ERP. The platform is easy to implement, so your team can get back to serving clients, even in busy season.

How can accounting firms track billable time more accurately?

Billable time is where accounting firms quietly lose revenue. In busy season, staff log hours days later, minutes get rounded away, and managers spend evenings chasing timesheets.

Some of the most effective ways to close that gap are:

  • Mobile time tracking, so staff can log hours anytime, anywhere
  • Automatic reminders to log time
  • Voice-to-text time tracking functionality
  • Time tracking tied directly to each engagement and client, so hours land on the right job without re-entry

Can BigTime support fixed-fee, hourly, and retainer engagements?

Yes. BigTime supports hourly, fixed-fee, retainer, and hybrid billing models. You can match billing to each engagement letter, generate invoices in bulk or one by one, and track actuals against the agreed fee to protect margin on every client.

Your billing setup may vary depending on your BigTime subscription. Speak to our expert team to find the right configuration for your business.

How does BigTime help accounting firms plan staff capacity for busy season?

BigTime offers real-time utilization and capacity dashboards that show partners and practice managers who’s available and who’s overbooked. Use them to balance workloads before deadlines stack up, match skills to upcoming engagements, and find the most cost-effective way to staff each one, so peak season doesn’t run on overtime alone.

What integrations does BigTime offer for accounting firms?

BigTime integrates with QuickBooks, Sage Intacct, Lacerte, Salesforce, HubSpot, and dozens of other systems accounting firms already use. Time and invoices sync with your accounting system, and open API access lets you connect custom systems, so data flows cleanly across CRM, billing, and the general ledger.

Explore our full integration ecosystem here.

How does BigTime help accounting firms reduce unbilled WIP?

BigTime gives partners and firm leaders real-time visibility into work that hasn’t been billed yet, with live data on:

  • Unbilled time and expenses
  • Engagement budgets vs. actuals
  • Margin by client and staff member
  • Invoices awaiting approval

Instead of waiting weeks for a report, your team sees the number on the dashboard, bills sooner, catches write-downs early, and keeps cash flow predictable.

Trusted by Accounting Firms Across Service Lines

Tax Preparation & Planning

Audit & Assurance

Bookkeeping & Client Accounting

Advisory & Outsourced CFO

Expat & International Tax

Forensic & Litigation Support

Payroll & Business Services

20+

Years in professional services

2800

Active Customers

9.1

Average NPS Score

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Try BigTime Today

Every week without financial precision has a price.

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