Grocery prices have a way of creeping up on you. You walk in for milk and eggs, walk out with a receipt that makes your eyes water. The good news is you don’t need to become a coupon clipper or chase rain checks to fight back. Price matching, where a store honors a lower price from a competitor, is one of the most underused weapons in your shopping arsenal. And unlike comparing ten different flyers or downloading a dozen store apps, price matching can be done in one place with a little preparation. Here is how to make it work without turning your weekly errand into a second job.

First, understand that not every store is created equal when it comes to price matching. The big-box retailers like Target and Walmart have famously generous policies, but they come with strings attached. You generally need to show proof of the lower price, either on your phone or in a printed ad. Smaller regional chains often match local competitors but exclude online-only deals or require the product to be identical in size, brand, and quantity. Your first step is to know the exact policy at the stores you frequent. Check their websites or, better yet, ask a manager before you assume. You don’t want to hold up the line with a cart full of mismatched yogurt cups.

Once you know the rulebook, the trick is learning how to find competing prices without wasting an afternoon. This is where technology becomes your friend. Flip the way you normally use your phone: instead of checking a store app to see what that store is charging, check an app like Basket or Flipp that aggregates weekly ads from every store nearby. When you spot a sale on chicken breast or paper towels at a competitor, note the price and the store. Do this while you are still at home, or even in the parking lot of the store you plan to visit. The goal is to have the proof ready before you walk through the doors, because trying to load a website while your ice cream melts in the cart is a recipe for frustration.

You also need to think about what is actually worth matching. A twenty-cent difference on a can of beans might not justify the awkward conversation at checkout. But a five-dollar gap on a pack of diapers or a two-dollar difference on a gallon of olive oil absolutely is. Focus your energy on the items that make up the bulk of your bill: meat, dairy, toilet paper, cleaning supplies, and pantry staples. These are the products where stores often have the widest price swings between each other. Forget price matching the odd specialty snack or a store-brand item that no competitor sells. Keep your ammunition for the heavy hitters.

There is also a behavioral trick that seasoned pros use. If you have a Target RedCard or a Walmart+ membership, you might already get a small discount on your entire order. Do not assume that means you cannot also price match. In most cases, the store will honor the lower price first, and then apply whatever extra discount you are entitled to on top. That stacks nicely. Another overlooked angle is price correction after the fact. Several major retailers, including Target and Kroger, will refund the difference if an item goes on sale within a week or two after you bought it at full price. Save your receipt and check the new ad on the same day it drops. A quick trip to customer service can put a few extra dollars back in your pocket without anyone having to match a thing at the register.

When you do approach the checkout lane with a price to match, always be polite and prepared. Have the exact item up on your screen, with the store name and date clearly visible. If you are shopping in person, showing the cashier your phone is usually enough. Some stores require a manager’s approval, so build in a little extra time on your first try. Do not argue if they turn you down over a technicality, like a misspelling in the ad or a different package size. Thank them and move on. You will learn the boundaries of each policy quickly, and next time you will be ready to adjust.

Price matching is not about nickel-and-diming a hardworking cashier. It is about using the rules that stores themselves have written. Grocery chains want your business, and they know you have choices. Price matching is their way of saying they will not be beaten on the basics. By taking a few minutes before you leave the house and staying aware of what is fair, you can keep your budget intact while still eating well and keeping your home stocked. That is the kind of win that makes the whole chore of grocery shopping feel a little less like a drain. Because at the end of the day, you are paying for more than just food. You are paying for convenience, quality, and time. Price matching helps you stop overpaying for those, too.