Billable hours calculator for law firms

Law-firm billing turns recorded time into invoice value; Everhour keeps budgets visible as matters accrue hours.

How many billable hoursdid you actually work?

Track billable vs. non-billable time and see your real utilization rate and revenue potential in seconds.

Working hours in the period

Admin, meetings, internal work

$
80%

Industry average is 75–80%

Monthly revenue
Billable hours136h
Utilization rate85%
Revenue gap to target$0

Everhour does it all — track, budget, report & invoice

The calculator gives you the number — Everhour takes it from there.

Go ahead — start tracking!

One click and you're timing. Start a timer, add an entry, edit the details. This is exactly how it feels in Everhour.

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Works with your favorite tool:
Everhour — Time Tracking
Time Entries
01:24:00
00:31:00
01:07:00

No more budget surprises

Set a budget, assign rates, and get alerted before you're over.

  • Real-time cost tracking
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  • Alerts before you hit the budget limit
Everhour — Budgeting
Acme Web Project
1
50% of budget used
$2,500.00of $5,000.00
$2,500.00 remaining
75%
Actual costRemaining cost

Measurement

Track your budget through time or costs

Simple, customizable reports

Every report you need — configured your way, always up to date.

  • See who does what in real time
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  • Scheduled email reports
Everhour — Reports

Your invoice is ready!

Tracked hours flow straight into a polished invoice — no copy-paste, no manual math.

  • Billable hours straight into the invoice
  • Configure invoice templates
  • Copy invoices to QuickBooks or Xero
  • Invoicing dashboard with status
Everhour — Invoices
Your Company LLChello@yourcompany.com
INVOICE
Invoice #1042
Group by:
DescriptionHoursRateAmount
Website Redesign14h$150/h$2,100.00
Brand Guidelines7h$150/h$1,050.00
Marketing Strategy3.5h$150/h$525.00
Total Due$3,675.00
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Law-firm billing math basics

What this calculation answers

A law-firm billable-hours calculation answers a direct billing question: how much recorded client work is worth before or after adjustments. For an hourly matter, the starting point is billable hours multiplied by the timekeeper's standard hourly rate. The result gives you the gross billable value before discounts, write-downs, billing realization, collection realization, expenses, or jurisdiction-specific tax inputs.

For U.S. lawyers, the fee basis or rate must be communicated before or within a reasonable time after representation begins, preferably in writing under ABA Model Rule 1.5. The calculation should match that engagement basis: hourly, fixed, or contingent. When the matter is hourly, use the approved billable time, the correct timekeeper rate, and the billing increment stated in the firm's policy or agreement.

Apply rates and increments correctly

Law-firm billing often uses one-tenth-hour or one-quarter-hour increments. ABA guidance permits rounding to minimum time periods such as 0.1 or 0.25 hour, but only as an exception to the rule that hourly clients may not be billed for more time than actually spent on the matter. Apply the increment consistently before multiplying by the rate.

For example, a litigation matter includes 13 approved partner hours at $375 per hour, 24 associate hours at $225 per hour, and 9 paralegal hours at $135 per hour. The standard billable value is $4,875 + $5,400 + $1,215 = $11,490. If the firm invoices 88% of that value after write-downs, the realized invoice amount is $10,111.20 before any applicable tax or expense lines.

Compare value to firm targets

Law-firm billable hours are not only invoice inputs; they also show whether work patterns support annual targets. Published law-school guidance places stated law-firm billable requirements around 1,700 to 2,300 hours per year, while noting that a 2,000-hour requirement is not typical across all firms. A calculator helps translate monthly or matter-level entries into that larger workload picture.

Do not confuse billable value with collected revenue. Utilization measures the share of an eight-hour workday spent on billable work, realization measures the share of billable work invoiced, and collection measures the share of invoiced work paid. Current legal-industry benchmarks cite 38% utilization, 88% realization, and 93% collection, leaving average firms collecting on about 2.4 billable hours per eight-hour day.

When calculation needs workflow

A one-off calculation is enough when you need to check a draft invoice, estimate matter value, or compare a timekeeper's month against a target. It is not enough when multiple lawyers enter time daily, partners review write-downs, clients require budget visibility, or the firm needs a reliable record of approved time before invoicing.

Everhour Project Budgeting fits the managed workflow side: matters can carry hour-based or money-based budgets, recurring budget periods, and budget alerts at 75%, 90%, 100%, or custom thresholds. For firms watching retainer burn, alternative-fee caps, or client-level limits across matters, that budget structure keeps the calculation connected to live time entry instead of a spreadsheet rebuilt after the fact.

This content is for general information only, may not be fully up to date, and is provided without any warranty or liability.

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Frequently Asked Questions

How should a law firm calculate billable value for a matter?

Start with approved billable hours for each timekeeper, apply the firm's billing increment, and multiply by the correct hourly rate. Add the timekeeper totals to get standard billable value. Then apply write-downs, discounts, realization, expenses, and jurisdiction-specific tax treatment only when those items apply to the client invoice.

Should partner, associate, and paralegal time use one blended rate?

Use a blended rate only when the client agreement or billing policy permits it. Otherwise, calculate each timekeeper category separately because partner, associate, and paralegal rates usually produce different billable values. Separate lines also make realization easier to review when a partner writes down one role but not another.

What rounding mistake creates overbilling risk?

The common mistake is rounding every small entry upward without checking whether the total bills more time than was actually spent on the matter. ABA guidance allows minimum increments such as 0.1 or 0.25 hour only as an exception to the rule that hourly clients may not be billed for more time than actually spent.

How do utilization, realization, and collection change the result?

Utilization turns total work time into billable work time. Realization turns billable work into invoiced work. Collection turns invoiced work into paid revenue. A matter can show strong billable hours but weak collected revenue if write-downs reduce the invoice or the client pays only part of the billed amount.

Is there a U.S. federal VAT or national sales-tax rate on legal billable hours?

No. The United States has no federal VAT/GST or single national sales-tax rate for billed professional time. Sales tax treatment is state and local, and services are taxed differently by jurisdiction. Use a jurisdiction-specific tax input when the legal service is taxable.

How does Everhour keep law-firm matter budgets under control?

Everhour Project Budgeting tracks hour-based and money-based budgets as time is logged, with recurring budget periods and email alerts at 75%, 90%, 100%, or custom thresholds. A firm can monitor matter limits before a draft invoice reveals an overrun.

Keep matter budgets current

Track approved legal time against live matter budgets, review thresholds before write-downs pile up, and keep invoice math tied to Everhour Project Budgeting.

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