diff --git a/erpnext/payroll/report/salary_register/salary_register.py b/erpnext/payroll/report/salary_register/salary_register.py
index 13ee691d87..78deb22778 100644
--- a/erpnext/payroll/report/salary_register/salary_register.py
+++ b/erpnext/payroll/report/salary_register/salary_register.py
@@ -134,11 +134,11 @@ def get_ss_earning_map(salary_slips, currency, company_currency):
 
 	ss_earning_map = {}
 	for d in ss_earnings:
-		ss_earning_map.setdefault(d.parent, frappe._dict()).setdefault(d.salary_component, [])
+		ss_earning_map.setdefault(d.parent, frappe._dict()).setdefault(d.salary_component, 0.0)
 		if currency == company_currency:
-			ss_earning_map[d.parent][d.salary_component] = flt(d.amount) * flt(d.exchange_rate if d.exchange_rate else 1)
+			ss_earning_map[d.parent][d.salary_component] += flt(d.amount) * flt(d.exchange_rate if d.exchange_rate else 1)
 		else:
-			ss_earning_map[d.parent][d.salary_component] = flt(d.amount)
+			ss_earning_map[d.parent][d.salary_component] += flt(d.amount)
 
 	return ss_earning_map
 
@@ -149,10 +149,10 @@ def get_ss_ded_map(salary_slips, currency, company_currency):
 
 	ss_ded_map = {}
 	for d in ss_deductions:
-		ss_ded_map.setdefault(d.parent, frappe._dict()).setdefault(d.salary_component, [])
+		ss_ded_map.setdefault(d.parent, frappe._dict()).setdefault(d.salary_component, 0.0)
 		if currency == company_currency:
-			ss_ded_map[d.parent][d.salary_component] = flt(d.amount) * flt(d.exchange_rate if d.exchange_rate else 1)
+			ss_ded_map[d.parent][d.salary_component] += flt(d.amount) * flt(d.exchange_rate if d.exchange_rate else 1)
 		else:
-			ss_ded_map[d.parent][d.salary_component] = flt(d.amount)
+			ss_ded_map[d.parent][d.salary_component] += flt(d.amount)
 
 	return ss_ded_map