Billable Hours Target Calculator

Annual billable targets are set in the aggregate and met one day at a time, and the daily arithmetic is frequently sobering. A target that sounds reasonable across a year can require a billable day that leaves no room for anything else.

This calculator works in the direction people actually experience: from the hours you genuinely record in a day, to the annual total, to the cash that arrives at the end of it.

Result

Annual billable hours

1,610

Cash collected

$423,623

Monthly hours: 134.2
Weekly hours: 35
Value recorded: $523,250
Value invoiced: $460,460
Lost to write-downs and non-payment: $99,627
Effective rate: $263.12
Overall yield: 80.96%

This tool performs arithmetic on the values you enter. It does not provide legal advice and does not create an attorney-client relationship.

Recorded time is not revenue. Write-downs before invoicing (realization) and unpaid invoices (collection) both reduce it, and the effective rate is what remains per hour recorded.

A one point improvement in collection is usually easier to win than a rate increase of the same value.

From recorded time to cash

Stage	Value	Share of recorded
Time recorded	$523,250	100%
Invoiced after write-downs	$460,460	88%
Cash collected	$423,623	80.96%

How to use the billable hours target calculator

Enter the billable hours you actually record in a normal working day.
Enter days per week and working weeks per year, excluding holiday and leave.
Enter your standard rate.
Apply realistic realization and collection percentages and read the collected figure.

What people use this for

Testing whether an annual target is achievable day by day.
Setting a personal target that accounts for write-downs.
Comparing two roles with different targets and rates.
Working out the daily hours required to reach a revenue goal.

Worked examples

Every figure below is produced by running this calculator against the example inputs, so the numbers always match the tool.

Seven billable hours a day

Seven hours a day, 5 days a week, 46 weeks, at $325 with 88% realization and 92% collection.

Annual billable hours: 1,610
Cash collected: $423,623
Effective rate: $263.12

Five billable hours a day

The same year at a more sustainable daily figure.

Annual billable hours: 1,150
Cash collected: $302,588
Lost to write-downs and non-payment: $71,162

The gap between a working day and a billable day

A ten-hour day rarely produces ten billable hours. Email that cannot be attributed, supervision, training, business development, administration and the simple friction of switching between matters all consume time that no client will pay for.

A target set as though that time does not exist produces one of two outcomes: a target nobody meets, or time recording that quietly becomes optimistic. Neither is good for the firm.

Weeks per year is the input people overstate

Fifty-two weeks is not available. Holiday, public holidays, sick leave, training and the weeks around them that are never fully productive typically remove six or more.

Setting the figure honestly at forty-four to forty-seven changes the required daily hours materially, and it is the difference between a target that reflects a real year and one that assumes an imaginary one.

Methodology and assumptions

What this calculator does, and what it deliberately does not do.

Annual hours = hours per day × days per week × weeks per year.
Recorded value = annual hours × rate; realization and collection are then applied in sequence.
The effective rate divides collected value by hours recorded.
The tool performs arithmetic or date counting on the values you enter. It does not interpret a rule, a statute or a contract.
Nothing you type is transmitted or stored - the calculation runs entirely inside your browser.

This website provides general informational and productivity tools and does not provide legal advice or create an attorney-client relationship.

The date and deadline tools count days exactly as you instruct them. They do not interpret court rules, statutes of limitation, filing requirements or any other legal authority, and they do not know the rules of your jurisdiction.

Always verify any date, fee, or calculation against the governing rule, the court calendar and your own professional judgement. If you need legal advice, consult a lawyer licensed in your jurisdiction.

Frequently asked questions

How many billable hours a day is realistic?

Considerably fewer than the hours worked. The honest figure is whatever your time records actually show over a full month, not what a target says.

Should I include weekends?

Only if you genuinely work them regularly. Building them into a target that is supposed to be sustainable is how targets stop being met.

Does a higher target always mean more revenue?

Not if realization falls with it. Time recorded under pressure is more likely to be written down, and an unsustainable target can reduce collected revenue.

How does this differ from the utilization calculator?

This works forward from a daily habit to an annual result. The utilization calculator works backwards from a completed period to diagnose where capacity was lost.

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