Persuasion & consumer psychology · law 049
Law of Reciprocity
Also known as: Reciprocity principle
By Shivam Bhandari · Reviewed 31 October 2026 · How we write
what it means
People feel obliged to return favours — when you give first, others are more likely to give back.
How Law of Reciprocity works
A free sample, useful advice, or an unexpected favour creates a sense of debt. Most people want to even the balance, which makes them more open to buying, helping, or saying yes.
It works best when the gift is genuine, personal, and unexpected — not a transparent bribe.
where it comes from
Reciprocity is found in almost every human culture. Psychologist Robert Cialdini made it the first of his six principles of persuasion in Influence: The Psychology of Persuasion (1984).
Law of Reciprocity examples in business
Free samples
A sweet shop offers a taste of a new mithai; many customers who taste it buy a box.
Content
A consultant shares a genuinely useful free checklist; readers later choose them when they need paid help.
Restaurants
Studies of restaurant mints found that a small personal gift with the bill increased tips.
How to apply it
- 1Find something valuable you can give before asking for anything.
- 2Make it personal and relevant to the customer's actual problem.
- 3Give without strings — pressure destroys the effect.
- 4Follow up naturally after the value has been received.
common misreading
Using fake ‘gifts’ to manipulate people backfires once they notice. Reciprocity rewards genuine generosity.
ask yourself
What could you give your best prospects before you ever ask them to buy?
put it into practice
Frequently asked questions
What is Law of Reciprocity?
People feel obliged to return favours — when you give first, others are more likely to give back. A free sample, useful advice, or an unexpected favour creates a sense of debt. Most people want to even the balance, which makes them more open to buying, helping, or saying yes.
Who came up with Law of Reciprocity?
Reciprocity is found in almost every human culture. Psychologist Robert Cialdini made it the first of his six principles of persuasion in Influence: The Psychology of Persuasion (1984).
How do you apply Law of Reciprocity in business?
1. Find something valuable you can give before asking for anything. 2. Make it personal and relevant to the customer's actual problem. 3. Give without strings — pressure destroys the effect. 4. Follow up naturally after the value has been received.
What is a common misunderstanding of Law of Reciprocity?
Using fake ‘gifts’ to manipulate people backfires once they notice. Reciprocity rewards genuine generosity.