NEW YORK — It’s never been easier to get burgers, burritos and other items from fast-food chains delivered to your doorstep. But the convenience can hurt your wallet.

More fast-food companies have been offering delivery by teaming up with food-ordering apps, many of which charge fees or other added-on costs. The chains see delivery as another way to boost sales, but for customers, it can turn a typically cheap meal into a pricier one.

“If you’re not careful, your fees can add up to be more than the cost of the food,” says Sara Skirboll, a shopping and trends expert at deal site RetailMeNot.

Fast-food companies typically use several online ordering services, and their fees and rules differ, so you’ll need to do some research to know what you are spending.

Many apps charge delivery fees, and the amount can differ widely depending on the city you live and app you’re using. Online ordering apps charged fees ranging from $1 to as much as $11, according to a report last month from analysts at investment bank Mizuho. Typically, the app will tell you what the fee amount is before paying.

Another thing to look out for: surge pricing. Uber Eats, which delivers for McDonald’s, and Postmates, which has partnered with burrito chain Chipotle, charge more during busy ordering times. Both companies notify users that they will be charged more for delivery before they pay.

Some apps may charge more for menu items than they cost if you walked into the restaurant. Uber Eats, Postmates and DoorDash all say the prices on their apps may vary from what is charged in-store. You can find out if the app you are using does the same by looking at its frequently asked questions section in the app or website, or in the “help” section.

Grubhub, which recently announced a deal to increase delivery at KFC and Taco Bell, says its prices are the same as those inside restaurants.

Some apps automatically set a tip amount that could be as much as 20 percent. Make sure to check how much of a tip the delivery person is getting.

Be aware of any delivery minimums. Restaurants might set a minimum, forcing you to buy more than you normally would if you were at the restaurant.