How Accounting Firms Track Billable Hours (Tax Season Guide)

During tax season, the average accountant can work 60 to 80 hours per week. The real question is how many of those hours are actually billed. That is where revenue starts to leak. If a firm does not track billable hours accurately during its busiest weeks, quick calls, review notes, email chains, and rushed admin quietly turn into lost income.

This guide starts where the real issue begins: not with a generic definition, but with the way accounting firms actually work under pressure. Partners, managers, and staff move between tax returns, payroll issues, client questions, document review, and internal coordination all day. When that happens, basic time tracking breaks down. Billable time gets mixed with non billable time, processes slow down, and client billing becomes harder to defend.

For accounting professionals, the goal is simple. Build a system that helps the firm track time as work happens, reduce human error, and turn recorded work into accurate reporting, cleaner billing methods, and healthier cash flow.

Note: All benchmarks in this guide come from the CPA.com/AICPA CAS Benchmark Survey (2024) and the Journal of Accountancy – not from vendor marketing.

Why Accounting Firm Billable Hours Matter

In professional services, billable hours function as the core inventory the firm sells to generate revenue. For many traditional accounting firms, the primary driver of income is still revenue generated from billable hours. That is also why understanding time usage matters so much. It helps firm leaders forecast profitability, set pricing, and identify the most profitable services before margin problems start to spread across the client base.

The Billable Hours Problem in Accounting Firms

During tax season, hours go up, but that does not guarantee better realization.

Firms often lose revenue on small tasks that never make it into the record: a short client call, a follow-up email, a quick payroll fix, or a review pass that gets logged too late. Those gaps matter because accounting firm billable hours still sit at the center of how many firms measure performance, utilization, and revenue.

As a practical benchmark, the CPA.com and AICPA CAS survey found that annual billable hours per FTE averaged 1,328 overall, reached 1,422 among top performers, and fell to 1,164 in stand-alone CAS practices. This is not a universal target for every firm, but it gives accounting leaders a useful annual range when they assess utilization and staffing pressure.

When 36% of Work Never Reaches the Invoice

The deeper problem is not just missed time. There is poor separation between billable hours, non-billable time, and later write-offs. The same benchmark data also shows how much time slips outside direct billable work. CPA.com and AICPA reported 2,080 average total hours worked per FTE versus 1,328 average billable hours, which implies roughly 752 hours per person, about 36% of total time, went into non-billable work, admin, training, or other non-chargeable activity. If the firm cannot see which hours were worked, which were billed, and which were absorbed internally, it cannot price correctly or explain profitability by client.

Tax season magnifies that problem. Accounting firms have less room for admin, more switching between tasks, and greater pressure to deliver fast. That is why CPA firms and certified public accountants need more than rough timesheets. They need accurate time tracking that shows where time goes, which clients create strain, and where administrative overhead starts to distort margins.

High pressure to meet billable targets creates another problem that firms underestimate. It can push teams toward burnout and, over time, raise turnover risk, especially when long busy-season weeks combine with weak staffing visibility and poor workload distribution.

How Accounting Firms Track Time in Practice

Most accounting firms use one of three methods:

1. Manual entry through spreadsheets, paper notes, or delayed timesheets
2. Accounting software or billing software with built-in timing tools
3. Dedicated time tracking software

Manual time tracking

The first is manual entry through spreadsheets, paper notes, or delayed timesheets. This is still common, but it is unreliable. People batch entries at the end of the day, forget short tasks, and log hours from memory. That increases administrative burdens and weakens client billing.

Logging time with accounting software

The second method uses accounting software or billing software with built-in timing tools. Some firms stay within QuickBooks Online, QuickBooks Desktop, QuickBooks Online Payroll, or QuickBooks Time because they want to keep the tech stack simpler. That can help with familiarity, but it does not always fit the pace of client work during tax season. A built-in tracker may record hours, yet still fall short on project tracking, reporting tools, or flexible time and billing workflows.

Dedicated time tracking and billing software for accounting firms

The third method uses dedicated time tracking software.

This is usually the strongest option when firms need to track billable hours across multiple clients, manage projects, support expense tracking, and keep accurate reporting close to billing. Unlike generic time trackers, better tracking software gives firms automatic time capture, automated time logs, mobile time tracking, mobile access, and a user interface that does not slow people down. That matters because accounting professionals do not work in a straight line. They move between tax prep, review, research, and communication constantly.

The right time tracking software should also support billing software for accountants, seamless integration with accounting software, QuickBooks integration, export data options, customizable reports, and comprehensive reporting. In a strong setup, firms do not just log hours. They gain insights, review team productivity, and see team capacity before overload turns into write-downs.

What to Look for in Time Tracking Software for Accounting Firms

A good billing solution for accountants should handle client work, billable time, non billable time, expense tracking, and automated invoicing in one workflow. It should also support accurate reporting, time reports, insightful reporting, and professional invoices without forcing people through a long learning curve.

That is where many generic time trackers fail. They can track time, but they do not always support billing processes, automated billing, online payments, or payment processing in a way that fits accounting firms and law firms. Software for accountants has to do more than start and stop a timer. It has to connect work, billing, and reporting.

Using time and billing software also reduces the time and manual effort needed to log and calculate billable client hours. That directly improves overall profitability, because the firm spends less energy on admin and loses fewer hours before they reach an invoice.

Tax Season Checklist for Accounting Professionals

Before tax season, set up each client as a separate project, define billable categories, confirm rates, and decide how the firm will treat non billable time. Make sure the team knows what must be logged and when timesheets need review.

During tax season, keep automatic time capture on, review timesheets every week, and flag unbilled work early. Do not rely on memory. Do not leave short calls or client emails outside the record. Watch whether staff are logging hours at the right level of detail.

After tax season, compare recorded time with invoiced time, review write-off patterns, and check whether fixed fee work still matches actual effort. Use the data to reduce administrative overhead, adjust rates, and improve next season’s workflow.

Common Mistakes That Cost Accounting Firms Money

The most common mistake is ignoring small tasks. Quick calls, short emails, review comments, and portal messages feel too minor to record, yet they add up fast. Another costly habit is batching time at the end of the day or week. Once people reconstruct work from memory, accuracy drops.

A third mistake is failing to separate billable hours from non billable time. Without that distinction, firms cannot see whether a margin problem comes from pricing, internal inefficiency, or excess admin. The fourth mistake is choosing software for small businesses that cannot support accounting firms once volume rises.

Firms also lose money when they use multiple timers or disconnected systems without document management, project tracking, or accurate reporting close to billing. The result is more human error, slower invoicing, and more administrative overhead than the team realizes.

How TimeCamp Helps Accounting Firms With Time and Billing

TimeCamp addresses the biggest tax-season problems directly. It helps teams track time automatically, reduce batch entry, and keep cleaner records of billable time and non billable time. That makes client billing easier to defend and helps firms reduce administrative burdens.

For accounting firms, TimeCamp combines time tracking, time and billing, expense tracking, reporting tools, and automated invoicing into a single workflow. It also supports QuickBooks integration, data export, and automated billing for firms that need better visibility without adding a heavy learning curve.

TimeCamp also integrates with Xero, allowing firms to import clients, track time against them, and export invoices directly to Xero. That creates a more consistent billing workflow for teams that do not want to rely on QuickBooks alone. It supports accounting workflows that depend on project tracking, flexible billing methods, and accurate reporting. Invoicing and billing features are available from the Starter plan. 

Free

$

0.00

Free plan includes all the essentials (accurate time tracking, unlimited projects, desktop, and mobile apps, idle time detection, and many more).

Starter

$

3.99

user/month

Starter plan includes unlimited tasks, excel reports export, attendance, time-off, overtime tracking.

Premium

$

6.99

user/month

Premium plan includes one integration, billable time, budget and estimates, apps and websites tracking, project archiving, and more.

Ultimate

$

9.99

user/month

Ultimate plan includes unlimited integrations, billable rates, labor costs, invoicing, timesheet approvals, custom user roles, and more.

Enterprise

Contact
sales

Enterprise Plan, designed for companies with 50+ employees, includes priority support with SLA, self-hosted and private cloud instances, custom integrations, and more.

Automated systems for time tracking help prevent revenue leakage because they record billable hours in real time instead of leaving staff to rebuild the day from memory.

Automated time tracking software also:

• captures every billable hour worked
• improves client billing accuracy
• reduces administrative burdens during tax season

These essential features matter because firms do not need more admin during busy season. They need software for accountants that helps them bill clients, manage projects, produce professional invoices, and get paid faster. TimeCamp also offers a free plan, which makes it easier to test the workflow before committing to a broader rollout.

Monitoring how staff allocate their time also reveals inefficiencies that are easy to miss in a busy period. It helps firms spot bottlenecks faster, rebalance workloads, and improve overall productivity before delays start to damage margins or service quality.

See TimeCamp for accountants for a closer look at how the platform handles time tracking, invoicing, reporting, and integrations for accounting workflows.

Want to see the business impact of better time data? Read our CPA profitability guide next.

Start Tracking Billable Hours for Free

A free entry point matters when you want to test a process before changing the whole stack. TimeCamp’s public pricing includes a free plan plus paid options that add invoicing, billable time, expenses, reporting, and approvals.

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Why Accurate Reporting and Automated Invoicing Matter for Accounting Firms During Tax Season

During tax season, accounting firms need a workflow that captures billable work without adding more admin, because accurate time data improves client satisfaction, protects team productivity, and makes it easier to approve timesheets on time. The key features of a strong setup include clear billable and non billable categories, reliable tracking, accurate reporting, and automated invoicing that shortens billing cycles and reduces missed revenue. When those elements work together, firms gain cleaner visibility into workload, stronger control over margins, and a practical way to boost profitability.

Billable Hours Tracking for Accounting Firms FAQ

What do accounting firms rely on most to generate revenue?

For many traditional firms, the main revenue driver is still billable client work. Billable hours remain the clearest basis for measuring output, pricing pressure, and recovery.

How can firms forecast revenue and utilization more effectively?

KPI reporting with real-time dashboards helps leaders monitor utilization, spot workload imbalances, and forecast revenue with more confidence.

Why does accurate time tracking improve client relationships?

Accurate records show how billed time was spent. That improves transparency, builds trust, and reduces billing disputes.

How does time data help firm leaders manage workloads?

Detailed time data helps leaders distribute work more effectively across the team. That lowers burnout risk and improves profitability.

Does time and billing software reduce admin work?

Yes. Good time and billing software reduces manual effort, shortens billing cycles, and makes it easier to log and calculate billable client hours.

Why do firms use utilization rates in performance reviews?

Utilization rates show how much time turns into billable work. Firms use them to measure productivity and support bonus or promotion decisions.

How do automated time logs reduce missed revenue?

Automated time logs reduce reliance on memory. That limits human error and helps ensure more client work is captured.

How does time tracking software speed up invoicing?

When tracked time flows directly into billing, firms spend less time rebuilding entries and correcting mistakes. That saves time and helps generate invoices faster.

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Sources: 

https://www.cpa.com/sites/cpa/files/2022-12/cas-benchmark-survey-22-cpacom.pdf

https://www.cpa.com/sites/cpa/files/2024-12/2024-CAS-Benchmark-Survey.pdf

https://www.aicpa-cima.com/news/article/u-s-accounting-firms-show-strong-growth-in-profit-and-revenue-aicpa-and-cima

https://www.aicpa-cima.com/professional-insights/article/the-map-survey-your-compass-to-developing-firm-management

https://www.aicpa-cima.com/professional-insights/article/navigating-2025-tax-season-challenges

https://www.journalofaccountancy.com/issues/2022/oct/go-easier-on-staff-during-busy-season/

https://www.accountingtoday.com/news/seniors-take-the-brunt-of-busy-season-strain

https://www.accountingtoday.com/news/cpa-firm-profits-and-revenues-jumped-last-year

https://www.ifac.org/knowledge-gateway/discussion/how-price-client-engagements-and-increase-firm-profit

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Wojciech Piwowarski Wojciech Piwowarski is an author covering time tracking, business operations, and productivity. He specializes in turning complex topics such as workflow efficiency, profitability, and performance measurement into clear, practical insights. His experience comes from years of working with SaaS, B2B, and operational content built for decision-makers and professional teams. His work focuses on the role time data plays in better processes, sharper decisions, and stronger business performance.

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