diff --git a/docs/source/4_calculating-gross-pay.rst b/docs/source/4_calculating-gross-pay.rst
index fbae31e..b27a6d7 100644
--- a/docs/source/4_calculating-gross-pay.rst
+++ b/docs/source/4_calculating-gross-pay.rst
@@ -5,5 +5,10 @@ CALCULATING GROSS PAY
 Employment Income - Regular Earnings
 -------------------------------------
 
+**Employment Income**
+
+An individual working for an employer receives compensation or pay, known as remuneration, for the services they perform. Where an employee-employer relationship exists, 
+remuneration is referred to as employment income. Employment income can be categorized into earnings, allowances, benefits and taxable expense reimbursements.
+
 Irregular Earnings
 -----------------------------------
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