Accountants Billable Hours (Hourly) Calculator FAQ
Answers to common questions about hourly billable hours, utilization and accounting practice billing estimates.
This FAQ explains the calculator inputs, estimated outputs and practical limits of an hourly billings projection for an accounting practice.
General questions
Core concepts behind hourly billings.
What are billable hours for an accountant?
Billable hours are time spent on client work that may be charged under an hourly engagement, such as accounting work, tax preparation, advisory work and client meetings.
Who can use this calculator?
It can be used by sole practitioners, partners and practice managers who want a simple hourly billing capacity estimate.
What does the calculator estimate?
It estimates daily, monthly and annual billable hours plus gross fees billed from the inputs provided.
Inputs and formula
How each input affects the result.
How does the hourly rate affect billings?
Each additional unit in the realized hourly rate changes monthly billings by the number of estimated monthly billable hours.
How is utilization applied?
The calculator multiplies daily available hours by utilization divided by 100. The resulting daily billable hours are then used for monthly billings.
What should be included in available work hours?
Use the hours normally available in a workday before allowing for administration, marketing, training and other non-billable time.
Why enter working days per month?
It converts estimated daily billable hours into monthly billable capacity.
Accuracy and interpretation
Important boundaries around the estimate.
Is estimated billing the same as cash collected?
No. Billing capacity and invoiced fees can differ from payments received because of billing timing, payment terms and unpaid invoices.
Why might actual billings be lower?
Demand gaps, leave, fixed-fee work, discounts, write-offs, unplanned non-billable work and uncollected invoices can reduce actual results.
Does the calculator include operating costs?
No. Expenses such as staff, software, rent, insurance and marketing are not deducted.
Is this financial or tax advice?
No. It is an educational business-planning estimate and not financial, tax or professional advice.
Using the results
Ways to apply a planning estimate.
Should I use my advertised or realized hourly rate?
Use the average realized rate where possible, because it better reflects discounts, write-offs and different service mixes.
Can I compare different utilization targets?
Yes. Run separate conservative, expected and higher-utilization scenarios to understand the range of possible billing capacity.
Can this be used for a partial year?
Yes. Set working months to the number of months you want included in the projection.
What is billable utilization?
Billable utilization is the percentage of available work time that is expected to be chargeable to clients.
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