Freelance Vacancy Impact Calculator

6 unbilled weeks out of 52 represents roughly 11.5% of potential billable time — the calculator multiplies that share by the entered day rate and billable-days-per-week to produce a currency figure. Individual circumstances vary widely; the input accepts any value from 0 to 52. In some freelance planning approaches, this gap is treated as part of overhead when setting a day rate, covering holidays, sick days, admin, and client gaps. (Max potential assumes a 52-week year.)

Quick example

Worked through with example inputs: at a day rate of 400, 4 billable days per week, and 6 unbilled weeks, the income gap is 400 × 4 × 6 = 9,600 in the selected currency — equivalent to 6 of the 52 weeks (about 11.5%) at the same rate, against a 52-week capacity of 83,200. Any input change shifts the ratio and the absolute figure.

Which inputs matter most

You enter Day Rate, Billable Days per Week, and Unbilled Weeks per Year. Not every input has equal weight. Adjusting one input at a time toward extreme values shows which ones move the result most for a given situation.

What's happening under the hood

Income gap = day rate × billable days per week × unbilled weeks (the days that would have been billed if those weeks had been worked). The formula is listed in full below; the working is shown so the calculation can be retraced by hand if the number looks off.

Where to go next

Related calculators in this area include the freelance late payment cost calculator, the freelance tools cost calculator, and the freelance underpricing calculator. Each answers a different question and produces a separate figure.

Worked example in detail

Suppose a freelancer operates with these parameters:

• Day rate: 500
• Billable days per week: 5
• Unbilled weeks per year: 8

The calculator returns: 500 × 5 × 8 = 20,000. This figure represents the annual income equivalent of those 8 weeks if they had been billed at the stated day rate. Over a 52-week year, the freelancer has capacity for 260 billable days (5 per week × 52 weeks). The 8 unbilled weeks account for 40 of those potential days. The result illustrates the scale of that gap in revenue terms, not its cause.

When this matters

The metric surfaces planning questions in several contexts:

• Capacity planning: Shows how much potential billing capacity remains unused or unassigned in a given year.
• Rate setting: Helps calibrate whether a day rate accounts for known non-billable periods (leave, training, admin overhead).
• Business stability: Illustrates the income effect of client gaps, project dry spells, or seasonal demand patterns.
• Growth forecasting: Provides a baseline for modeling how reducing unbilled weeks affects annual revenue.

What this calculates and what it does not

The calculator estimates the monetary value of unbilled time based on your day rate. It does not:

• Account for the reason behind unbilled weeks (holidays, illness, client gaps, or deliberate rest are treated identically).
• Factor in variations in day rate week to week or client to client.
• Model collection risk, payment delays, or invoice acceptance rates.
• Include overhead costs, tax, or operating expenses.
• Distinguish between planned and unplanned vacancy.

The output is a straightforward multiplication for educational illustration. It shows what a given amount of unbilled time represents in revenue terms under stated assumptions, not what will actually occur or what adjustments are optimal for any particular freelancer.