Accountants Overhead Cost (Monthly) Calculator FAQ
Answers to common questions about accounting practice overhead, billable hours, break-even revenue, profit margins, and billing targets.
Use these answers to understand the inputs and results in a monthly accounting practice overhead calculation. The calculator is an estimate for business planning and depends on complete, current cost and billable-hours assumptions.
General overhead questions
Questions about the operating costs included in a monthly practice overhead estimate.
What counts as overhead for an accounting practice?
Overhead generally includes costs that support the practice rather than a specific client, such as payroll, rent, software, insurance, memberships, marketing, and administration.
Should partner or owner pay be included?
It can be included when it is a regular cost the practice must fund. Use a consistent treatment when comparing months or building a plan.
Should I include contractors in staff costs?
Include regular contractor costs in staff costs if they are part of the ongoing monthly operating model.
Where do annual subscriptions and insurance premiums go?
You can convert an expected annual cost into an average monthly amount by dividing it by 12, if that suits your planning approach.
Billable hours and hourly costs
Questions about using billable capacity to interpret cost and revenue targets.
What are billable hours in this calculator?
They are the combined hours expected to be charged to clients during the month, rather than all hours worked.
Why should non-billable time be excluded from billable hours?
Administration, training, leave, and business development cannot normally be billed directly, so including them can make the required rate appear too low.
What does overhead per billable hour mean?
It is the portion of monthly overhead that each expected billable hour must recover before any profit is retained.
Can a fixed-fee practice use an hourly result?
Yes. It is an average benchmark that can help compare fixed-fee revenue with the expected time needed to deliver work.
Revenue and profit-margin questions
Questions about break-even and the target revenue calculation.
What is break-even monthly revenue?
It is the estimated revenue needed to cover the overhead costs entered, before allowing for profit or costs not included in the calculator.
How is the monthly revenue target calculated?
Total monthly overhead is divided by one minus the target profit margin expressed as a decimal.
Why not simply add the profit percentage to overhead?
A profit margin is usually stated as a share of revenue, while adding a percentage to cost produces a markup. They are not the same calculation.
What does a 20% target margin mean?
It means the calculation aims for 20% of target revenue to remain after the listed overhead, leaving 80% of revenue to cover those costs.
Accuracy and planning use
Questions about assumptions, omissions, and reviewing results.
How accurate is the overhead calculator?
It is only as reliable as the cost and billable-hours estimates entered. It is best used as a planning estimate and reviewed against actual results.
Does the calculator include taxes and debt repayments?
No. These are excluded unless you decide to include relevant recurring amounts within an input category for planning purposes.
How often should monthly overhead be reviewed?
Review it when staffing, premises, software, insurance, professional costs, or expected workload changes, and compare it with actual figures regularly.
Should one-off purchases be included?
You can exclude unusual purchases from a recurring monthly view, or spread them over a chosen period to create a budgeted monthly allowance.
What counts as overhead for an accounting practice?
Overhead generally includes payroll, rent, software, insurance, memberships, marketing, and administration that support the practice as a whole.
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