Pro Rata Calculator Term Time

Term Time Only (Pro Rata) Calculator

function calculateTermTimeSalary() { // Get input values var fullSalary = parseFloat(document.getElementById('fullSalary').value); var paidWeeks = parseFloat(document.getElementById('paidWeeks').value); var stdHours = parseFloat(document.getElementById('stdHours').value); var actualHours = parseFloat(document.getElementById('actualHours').value); var resultBox = document.getElementById('resultOutput'); // Validation if (isNaN(fullSalary) || isNaN(paidWeeks) || isNaN(stdHours) || isNaN(actualHours)) { alert("Please fill in all fields with valid numbers."); resultBox.style.display = "none"; return; } if (stdHours <= 0 || paidWeeks <= 0) { alert("Hours and Weeks must be greater than zero."); return; } // Calculations // 1. Calculate the Hours Ratio (Part-time factor) var hoursRatio = actualHours / stdHours; // 2. Calculate the Weeks Ratio (Term-time factor) // Standard year is typically calculated as 52.1428 weeks (365 / 7) var fullYearWeeks = 52.1428; var weeksRatio = paidWeeks / fullYearWeeks; // 3. Calculate FTE (Full Time Equivalent) Factor var fteFactor = hoursRatio * weeksRatio; // 4. Calculate Final Pro Rata Salary var proRataAnnual = fullSalary * fteFactor; var proRataMonthly = proRataAnnual / 12; var proRataWeekly = proRataAnnual / 52.1428; // Display Results document.getElementById('resAnnual').innerHTML = proRataAnnual.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('resMonthly').innerHTML = proRataMonthly.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('resWeekly').innerHTML = proRataWeekly.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('resFte').innerHTML = fteFactor.toFixed(4); resultBox.style.display = "block"; }

Understanding Term Time Only (TTO) Calculations

Calculating salaries for term-time workers—such as teaching assistants, school administrators, and educational support staff—can be complex. Unlike standard year-round contracts, term-time contracts only pay you for the weeks you actually work, plus your paid holiday entitlement. This calculator helps determine your actual "Pro Rata" salary based on the Full-Time Equivalent (FTE) pay scale.

How the Pro Rata Formula Works

The term "Pro Rata" literally means "in proportion." To calculate your specific salary, two main reduction factors are applied to the full-time annual salary:

1. Hours Adjustment: This compares your weekly contracted hours to the standard full-time week (typically 37 or 37.5 hours).
2. Weeks Adjustment: This compares your paid weeks per year to the full calendar year (52.14 weeks).

The mathematical formula used in this calculator is:

(Actual Hours ÷ Standard Hours) × (Paid Weeks ÷ 52.1428) × Full Time Salary

Key Inputs Explained

• Full-Time Annual Salary: This is the salary band or grade amount advertised for the role if it were a 52-week, full-time position.
• Paid Weeks per Year: This is a critical figure. It is the sum of the weeks you are physically at work (e.g., 38 or 39 term weeks) plus your holiday entitlement (e.g., 4 to 6 weeks). A typical term-time contract might be paid for 44.2 weeks total.
• Standard Full-Time Hours: The standard working week for the organization, often 37 hours in the public sector or 37.5/40 hours in the private sector.

Why is 52.1428 used?

A common mistake is dividing by 52. However, a year consists of 365 days (or 366 in a leap year). When you divide 365 by 7 days a week, you get approximately 52.1428 weeks. Using this precise figure ensures that your hourly rate remains accurate when converted to an annual salary.

Example Calculation

Imagine a Teaching Assistant role with a Full-Time Equivalent salary of 25,000.

• Contract: 30 hours per week (Standard is 37).
• Term Time: 39 working weeks + 5 weeks holiday = 44 paid weeks.

The calculation would be:

1. Hours Ratio: 30 ÷ 37 = 0.8108
2. Weeks Ratio: 44 ÷ 52.1428 = 0.8438
3. FTE Factor: 0.8108 × 0.8438 = 0.6841
4. Actual Salary: 25,000 × 0.6841 = 17,102.50

Use the calculator above to input your specific contract details and ensure you are being paid the correct amount for your term-time agreement.