Work & Payroll

Billable Hours Calculator

Work & Payroll

Billable Hours Calculator

Capacity funnel first

Total weekly work (hours/week)Admin / non-billable (hours/week)Admin, sales, internal meetings, training, support, bookkeeping and unpaid gaps.Billable hourly rate ($/hour)

Collected revenue estimate$112,442.40Updates as you type · 28 billable h/week

1,288Annual billable h70.0%Utilisation107.3Monthly avg h$115,920.00Billed before leakage

40 total h/week - 12 non-billable h = 28 billable h. Collection rate 97%.

Year and collection assumptionsTurn capacity into realistic cash

Working weeks (weeks/year)Collected invoice rate (%)Allows for discounts, write-offs, non-payment or collection leakage.

Live result$112,442.40 collected28 billable h/week · 1,288 h/year · 97% collection rate.

Formula used

Billable hours per week = max(0, total work hours − non-billable hours). Annual billable hours = weekly billable hours × working weeks. Monthly average billable hours = annual billable hours ÷ 12. Collected revenue = annual billable hours × hourly rate × collection rate %.

This is the method behind the answer, so the result can be checked rather than simply trusted.

Live math canvas

Your numbers, formula and explanation together

Billable Hours Calculator: 1,288.00 billable hours/year. 28.00 per week; 107.33 monthly average; 112,442.40 collected revenue estimate.

Formula applied

The exact method behind this answer

CalculationTime keeps the method visible so the number can be checked instead of blindly trusted.

Billable hours per week = max(0, total work hours − non-billable hours). Annual billable hours = weekly billable hours × working weeks. Monthly average billable hours = annual billable hours ÷ 12. Collected revenue = annual billable hours × hourly rate × collection rate %.

Apply the formulaBillable hours per week = max(0, total work hours − non-billable hours). Annual billable hours = weekly billable hours × working weeks. Monthly average billable hours = annual billable hours ÷ 12. Collected revenue = annual billable hours × hourly rate × collection rate %.1,288.00 billable hours/year28.00 per week; 107.33 monthly average; 112,442.40 collected revenue estimate.

Your live breakdown

Current inputs in the calculation

These values come from the controls above and update when the calculator changes.

Total work hours: 40 hours/week
Non-billable work: 12 hours/week
Working weeks: 46 weeks/year
Billable hourly rate: 90 currency/hour
Collected invoice rate: 97 %

Resulting answer

1,288.00 billable hours/year

28.00 per week; 107.33 monthly average; 112,442.40 collected revenue estimate.

Answer: 1,288.00 billable hours/year
Live support: 28.00 per week; 107.33 monthly average; 112,442.40 collected revenue estimate.

Assumptions used

What this answer assumes

Capacity estimate only. Pipeline, scope creep, approvals, collection and unpaid support can reduce actual revenue.

Non-billable hours are deducted before annual capacity is calculated.
Working weeks exclude holidays, sick time, planned leave, seasonal shutdowns or unpaid gaps you choose to remove.
The collection rate is a planning allowance for invoice leakage and does not replace credit control or contract terms.
Revenue is a gross billing estimate before tax, expenses, payroll, platform fees, refunds or accounting treatment.

Master’s Tip

How to use the result well

Master’s Tip: billable capacity is a ceiling, not a promise. If sales pipeline, approvals, client delays or personal energy cannot fill the available hours, actual invoices will be lower than capacity.

Printable record

What belongs in the saved calculation

Save the inputs, result, formula, assumptions, page URL and date together so the calculation can be reviewed later.

Total work hours: 40 hours/week
Non-billable work: 12 hours/week
Working weeks: 46 weeks/year
Billable hourly rate: 90 currency/hour

What-if check

Non-billable time sensitivity

Small changes in admin, sales or support time change annual billable capacity and collected revenue.

Non-billable/week	Billable/week	Collected revenue
8.00 h	32.00 h	128,505.60
12.00 h	28.00 h	112,442.40
16.00 h	24.00 h	96,379.20

Visual proof

Weekly capacity split

The bar separates client-chargeable capacity from the real non-billable work that still has to be funded.

Visual grid

This number is one point on a larger pattern

Billable Hours is not just a final answer. It is a step on a line: before and after, input and output, assumption and result.

Micro-timehours, minutes, shiftsHuman scaledays, weeks, projectsMacro-timemonths, years, calendars

InputFormulaResult

1,288.00 billable hours/year

CalculationTime keeps the path visible: the input, the method and the final number belong together.

1,288.00 billable hours/year28.00 per week; 107.33 monthly average; 112,442.40 collected revenue estimate.

Inputs

Total work hours: 40 hours/week
Non-billable work: 12 hours/week
Working weeks: 46 weeks/year
Billable hourly rate: 90 currency/hour
Collected invoice rate: 97 %

Method

40 total hours minus 12 non-billable hours leaves 28 billable hours per week. Over 46 working weeks, annual billable hours are 28 × 46 = 1,288. At 90 per hour, invoices would total 115,920. At a 97% collection rate, collected revenue is 115,920 × 0.97 = 112,442.40.

Assumptions

Non-billable hours are deducted before annual capacity is calculated.
Working weeks exclude holidays, sick time, planned leave, seasonal shutdowns or unpaid gaps you choose to remove.
The collection rate is a planning allowance for invoice leakage and does not replace credit control or contract terms.
Revenue is a gross billing estimate before tax, expenses, payroll, platform fees, refunds or accounting treatment.

Notes

Use this space on the printed report for client, supplier, classroom, job-location, measurement, quote or approval notes.