BOSTON (TheStreet) -- Your supermarket doesn't love you. And the folks who make the pasta, peanut butter, cola and condiments you buy don't really worry about helping your household budget.
Those who deal in coupons do so to make money, not to cut you a break. While it can make good financial sense to save a few cents here and there by clipping and downloading coupons, companies provide that service as a means to get you to spend more, and if you don't think through your purchases using coupons can end up costing you in the long run.
Boiling it down, manufacturers have key goals when it comes to consumers -- they want more of them, buying more, more frequently. Coupons allow them to maintain and build upon their market share, draw first-time buyers into the fold, ease the blow of price increases or size or quantity reductions, and push stores to offer prime shelf displays and aisle placement.
Research by NCH Marketing Services, part of the media and marketing services company Valassis
The study found that 78.3% of shoppers regularly use coupons, compared with 75.8% in 2008 and 63.6% of consumers in the pre-recession survey of 2007.
Coupons are in many ways the ultimate lure, a promise of saving money by doing little more than hitting the "print" button or scissoring away at the Sunday newspaper. But there is no guarantee of a "win-win" if you fail to think strategically before reaching the check-out line.
Here are five ways coupons can be bad.
They put unnecessary items in your cart.
Supermarkets and retailers have long perfected the science of impulse buys. From the layout of aisles and shelves to the decor and signs, nearly every detail is calculated to get you to deviate from your shopping list and spend, spend, spend. Coupons can be a valuable means to that end.
"For food and beverage manufacturers and retailers, it's all about getting on the list," says Ann Hanson, executive director of product development at NPD and author of the report. "With so many purchasing decisions being made at home where meals are being planned and shopping lists assembled, it's important to focus on the consumer at home before they leave for the store."
Coupons can serve as a way to wrangle a product into that planning, as well as persuade shoppers lacking such a rigid agenda. NPD found that, of the 25% who do buy on impulse, 80% say they do so when they see an item is discounted.
They lead to pointless upgrades.
The store-brand ketchup is cheaper than "premium" brands such as Heinz and Hunt's. But armed with a coupon, even if it fails to split the difference, you may decide to upgrade.
Supermarkets have become particularly adept at pairing up items to increase your "savings." According to NCH Marketing Services, 26% of coupons last year required the purchase of two or more items.
Buy a pound of hamburger and there may be a sticker attached that offers an additional discount on a jar of relish or package of cheese -- if bought together. Failing to pair up the items might make you feel like you left money on the table, even if you have an unopened jar of relish in the pantry at home and just bought higher-quality cheese from a local deli.
Stores and manufacturers score all the more because the paired item is almost always a brand name that would cost more with or without the coupon.