Step 1: Recall the definition.
In a 'Not for Profit Concern', if the income exceeds the expenditure, it results in a surplus, unlike a profit in a profit-making organization.
Step 2: Evaluate the options.
- Deficit: Occurs when expenditure exceeds income.
- Profit: A surplus in a for-profit organization.
- Surplus: Correct answer, as it indicates excess income over expenditure in non-profit organizations.
- Loss: Occurs when income is less than expenditure.
Step 3: Conclusion.
Therefore, the correct term is Surplus.
Final Answer: \[ \boxed{Surplus} \]