* Location: Salaries vary significantly by country and even region within a country. A head teacher in London, UK, will earn considerably more than one in a rural area of the same country. Similarly, salaries in the US will differ between states and urban/rural locations.
* Experience: More experienced head teachers generally command higher salaries.
* School Size and Type: Larger schools or those with a particular focus (e.g., a specialist academy) may offer higher salaries. The school's funding level also impacts the salary budget.
* Qualifications and Leadership Roles: Further qualifications in leadership and management can affect salary.
To find a more accurate answer, you'd need to specify the country and potentially the region. You could then search online for salary surveys for head teachers in that specific area or check with relevant education unions or government websites.