Accountants Overhead Cost Calculator FAQ
Answers to common questions about accounting practice overhead, billable hours, cost recovery, assumptions, and calculator results.
This FAQ explains the inputs and results used in an accounting practice overhead calculation. The calculator provides an estimate for business planning and does not replace professional financial, tax, or pricing advice.
General overhead questions
Questions about what overhead means in an accounting practice and why it is measured.
What counts as overhead in an accounting practice?
Overhead generally includes costs that support the business rather than one specific client engagement, such as workspace, non-billable payroll, software, insurance, memberships, and marketing.
What is overhead cost per billable hour?
It is the portion of recurring practice overhead allocated to one expected billable client hour.
Why should an accounting firm calculate overhead per hour?
It can help the firm understand the cost base that client work needs to support before considering direct delivery costs or profit.
Can a sole practitioner use the calculator?
Yes. Enter one billable accountant and the recurring business costs that apply to the practice.
Inputs and billable capacity
Questions about entering costs and estimating chargeable hours.
Should office rent include service charges?
Yes. Include regular workspace-related costs such as rent and service charges if they are recurring monthly expenses.
Should support staff payroll be included?
Yes. Non-billable administration and support payroll, along with related employer costs and benefits, is commonly treated as overhead.
How should billable hours per accountant be estimated?
Use expected client-chargeable time after allowing for holidays, training, administration, internal meetings, business development, and unbilled work.
Should partner or billable accountant pay be entered as overhead?
That depends on the firm's internal costing approach. The calculator can show overhead alone, or those costs can be included if the aim is to allocate a broader cost base.
Formula and results
Questions about how the calculator produces monthly, annual, and hourly estimates.
How is total monthly overhead calculated?
The calculator adds office rent, support payroll, software and technology, professional fees and insurance, and other monthly overheads.
How is the annual overhead figure calculated?
Total monthly overhead is multiplied by 12.
How is monthly billable capacity calculated?
The number of billable accountants is multiplied by the billable hours expected from each accountant per month.
Does the overhead cost per hour equal the billing rate?
No. It is the overhead component only. A full billing rate may also need to cover direct staff costs, other delivery costs, profit, and applicable taxes.
Accuracy and practical use
Questions about interpreting estimates and keeping them useful.
Why might my actual result differ from the calculator estimate?
Actual costs and billable hours can vary due to hiring, leave, write-offs, changing subscriptions, unexpected expenses, and changing client demand.
How often should overhead calculations be updated?
Updating when significant costs, team size, or expected utilisation change can keep the estimate relevant.
What does a high overhead cost per billable hour indicate?
It may indicate high recurring costs, low expected billable capacity, or a combination of both. The calculation alone does not identify the cause.
Can this calculator be used for a remote accounting firm?
Yes. Enter relevant remote costs, such as software, IT support, coworking, allowances, insurance, and subscriptions, in the applicable cost categories.
What is overhead cost per billable hour?
It is the recurring practice overhead allocated to one expected billable client hour.
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