How to Calculate Night Overtime: Practical Guide with Examples

Calculating normal overtime already confuses many workers and Human Resources professionals. However, when overtime is worked at night, the account gains additional elements that increase complexity: Night Additional and Reduced Night Hour.

In this practical guide, we will explain in detail how to calculate nighttime overtime step by step, what are the percentages provided by law (CLT) and how to simulate the exact amount on your paycheck. To quickly simulate all your overtime, access our Overtime Calculator.

The Three Golden Rules of Night Work

Before we go to the formulas, you need to understand the three fundamental rules that the CLT (Consolidation of Labor Laws) establishes for work carried out at night:

1. Night Time: For urban workers, night time comprises work carried out between 10pm on one day and 5am on the next day.
2. Night Additional: Working during this period gives the right to an increase of at least 20% on the value of the daytime working hour (for rural workers the additional is 25%).
3. Reduced Night Hours: Night working hours are not 60 minutes like daytime hours, but rather 52 minutes and 30 seconds. This means that for every 52.5 minutes worked at night, the worker receives the equivalent of 1 full hour's salary. In practice, 7 clock hours worked at night correspond to 8 recorded working hours.

Step by Step to Calculate Nighttime Overtime

When overtime is worked at night, the worker must receive the normal hourly rate, plus the overtime bonus (generally 50% or 100%) and also the nighttime bonus (20%). O cálculo correto segue este fluxo:

Step 1: Calculate the Daytime Hourly Wage Value

Divide your gross monthly salary by your monthly working hours (normally 220 hours for those who work 44 hours a week).

• Formula: Hourly Wage = Monthly Salary / Monthly Working Hours.
• Example: Salary of $ 2.200 / 220 horas = $ 10.00 per hour.

Step 2: Calculate Night Time with the Additional 20%

The basis for nighttime overtime must be the hour already plus the 20% nighttime bonus.

• Formula: Night Time = Normal Time Value × 1.20.
• Example: $ 10,00 × 1,20 = $ 12.00 per night hour.

Step 3: Add the Overtime Percentage (ex: 50%)

Now, the overtime percentage (generally 50% for weekdays and 100% for Sundays and holidays) is applied to the nighttime hour already calculated in Step 2.

• Formula: Night Overtime = Night Time Value × (1 + % Overtime).
• Example for 50%: $ 12,00 × 1,50 = $ 18.00 per night extra hour.

Complete Practical Example

Imagine a worker with a monthly shift of 220 hours and a gross salary of $3,300.00. In a given month, he worked 10 hours of overtime in the period between 11pm and 12am (night period on a working day with a 50% increase).

1. Common Hour Value: $ 3.300 / 220 = $ 15.00.
2. Night Hour Value (with 20%): $ 15,00 × 1,20 = $ 18.00.
3. Value for Extra Night Time (with 50%): $ 18,00 × 1,50 = $ 27.00.
4. Total Receivable for 10 hours: 10 × $ 27,00 = $ 270.00.

Extra Tip: Remember that nighttime overtime is also part of the DSR (Remunerated Weekly Rest) calculation basis, which further increases the final amount received in your paycheck.