"Make" vs "do" - when to use each one

There's no perfect rule. English native speakers learn make/do collocations through exposure, not grammar. They don't think "should this be make or do?" because they have heard the correct pairing thousands of times since childhood. But there are patterns that cover most situations, and once you learn them, you will get the right answer far more often than not.

• Make a decision, make a plan, make a mistake, make progress
• Make a meal, make coffee, make a bed (you create/produce something)
• Make a phone call, make a noise, make an effort
• Make money, make a profit

Notice how many of these involve something new coming into existence. When you make a cake, a cake appears. When you make a plan, a plan now exists where there was none. Even "make a noise" fits, because the noise is produced by you. More examples: "She made a beautiful speech at the wedding." "Try not to make too much mess in the kitchen." "They made a fortune selling houses."

• Do homework, do the shopping, do the cleaning, do the dishes
• Do a job, do work, do business, do research
• Do your best, do a favour, do damage (perform an action)
• Do exercise, do sport (though "play" is often better)

Here nothing new is being created. You are carrying out a task that already has a name. More examples: "I need to do the laundry before Monday." "He does the accounts for a small company." "What do you do for a living?" That last one is a very common natural question, and it always uses do.

• Make friends, make an exception, make sense
• Do well, do harm, do wonders, do without

These do not follow the logic above, so trying to reason them out will only confuse you. Just accept them as complete units. "This new medicine does wonders for my back." "I could not make sense of the instructions." "We will have to do without hot water until the plumber comes."

Think "make" for the product and "do" for the process. If you end up holding something at the end (a meal, a decision, a mistake, money), it is usually make. If you are simply getting through a task on a list (the dishes, the shopping, your homework), it is usually do.

• "I did a mistake" → "I made a mistake" ✗
• "I made my homework" → "I did my homework" ✗
• "Can you do me a favour?" ✓ "Can you make me a favour?" ✗

One more mistake learners often make: "make sport" or "make exercise." These are wrong. Say "do exercise" or, even more naturally, "get some exercise" and "play sport."

If you can replace it with "produce" or "create," use make. If you can replace it with "perform" or "carry out," use do.

Both words are universal. They appear in all registers, from casual chat to formal business writing. In a workplace you might say "Let's make a decision by Friday" and "I'll do the research this week," and both sound perfectly professional. In casual conversation you might say "I'm just going to do the washing up" or "Shall I make us a cup of tea?" There is very little British and American difference here, though British speakers say "do the washing up" where Americans often say "do the dishes."

"Make do" combines both words and means to manage with what you have, even if it is not ideal. For example, "We didn't have coffee, so we made do with tea." Do not confuse this with the ordinary make/do choice, as it is a fixed phrase all of its own.