What happens if only income changes but price stays the same?
From NCERTAsked by Anonymous from Mountain View, United States1 Oct 2026, 10:09 AM ISTUpdated
In one line
If your income goes up or down but prices stay the same, you can buy more or less things than before.
The rule
When income changes but price remains the same, the demand for goods usually changes, but the price does not.
Let's understand it simply
Imagine you get extra pocket money this month, but the price of samosas at your school canteen stays at ₹10 each. Now, you can buy more samosas if you want. If your pocket money is less, you might buy fewer samosas, even though the price is unchanged. So, your ability to buy things depends on your income, not just the price.
How it works
Your income increases or decreases.
The price of goods in the market does not change.
With more income, you can buy more goods (demand increases).
With less income, you can buy fewer goods (demand decreases).
The price stays the same, so only your buying power changes.
What happens when income changes but price stays the same
Income increases or decreases
Price of goods stays the same
You can buy more or less goods
The price tag does not change
Where you see it in real life
Salary hike: If your father gets a raise but rice still costs ₹40 per kg, your family might buy more rice or better quality rice.
Scholarship: You get a scholarship, but the price of books is the same. Now you can buy more books.
Festival bonus: During Diwali, many workers get a bonus. If the price of sweets does not change, families can buy more sweets for celebrations.
Drought year: Farmers earn less, but the price of vegetables in the market is unchanged. They may buy less from the market.
Why it matters
Helps understand why people buy more or less even if prices do not change.
Important for shops and businesses to plan how much to stock.
Useful for the government to know how income changes affect people's lives, even when prices are stable.
Common mistakes
Thinking price must always change if people buy more or less. (Here, only income changes, so price can stay the same.)
Mixing up demand and price: Demand can change even if price does not.
Remember it
If income changes but price does not, only your buying power changes — not the price tag.
Check yourself
If the price of milk is ₹50 per litre and your income doubles, what happens to your ability to buy milk?
You can buy more milk because your income increased, even though the price is the same.
Why does demand increase if income rises but price stays the same?
Because people have more money to spend, so they can buy more goods.
If your income goes down but the price of your favourite snack stays the same, what will you do?
You will probably buy less of the snack because you have less money.
Quick recap
When income changes, demand changes even if price stays the same.
Higher income means you can buy more; lower income means you buy less.
Prices do not always change just because people buy more or less.
Shops and markets watch income trends to plan stock.
