The retail categories on this board are ranked by how often a promo code actually applies at checkout — measured from real verification attempts across every store SimplyCodes tracks and rebuilt every day. The order changes as the attempts behind it accumulate.
As of September 2, 2026, SimplyCodes ranks 16 retail categories by promo-code checkout success rate, measured across 13,434,868 real checkout attempts at 27,586 stores. Automotive leads at 80.9%. Artificial Intelligence trails at 40.6% — a 40.3-point spread. Reliability tracks what you are buying, and how deep the code claims to go.
- Automotive (80.9%) and Hobbies & Toys (78.1%) are the two most reliable categories for promo codes right now.
- Pooled across every category measured, 74.4% of SimplyCodes' checkout attempts succeed — so a category below that line is genuinely harder than average, not merely unlucky.
- The spread is 40.3 points from top to bottom, which is wide enough to be worth knowing before you go looking for a code and narrow enough that no category is hopeless.
Checkout success = the share of SimplyCodes verification attempts at stores in that category that succeed · Attempts = how many real checkout attempts the figure rests on · Stores = how many stores in that category were measured. A category is ranked only with 10,000+ attempts across 100+ stores.
| # | Category | Checkout success | Attempts | Stores |
|---|---|---|---|---|
| 1 | Automotive | 80.9% | 393,308 | 778 |
| 2 | Hobbies & Toys | 78.1% | 847,734 | 1,802 |
| 3 | Pets | 77.9% | 329,706 | 768 |
| 4 | Beauty | 76.6% | 1,948,863 | 3,327 |
| 5 | Apparel | 75.4% | 4,397,506 | 8,172 |
| 6 | Education | 75.4% | 60,286 | 240 |
| 7 | Food & Restaurants | 74.9% | 787,311 | 2,021 |
| 8 | Home & Garden | 74.8% | 2,121,808 | 4,329 |
| 9 | Business | 71.6% | 129,755 | 366 |
| 10 | Software | 70.7% | 108,021 | 431 |
| 11 | Electronics | 70.7% | 965,034 | 1,562 |
| 12 | Travel | 68.4% | 166,584 | 557 |
| 13 | Shopping | 68.3% | 183,186 | 316 |
| 14 | Entertainment | 64.7% | 136,131 | 604 |
| 15 | Sports & Outdoors | 64.7% | 849,149 | 2,184 |
| 16 | Artificial Intelligence | 40.6% | 10,486 | 129 |
16 retail categories ranked by real-checkout success rate · a category needs 10,000+ verification attempts across 100+ stores to appear · a category-level measurement, no individual store named or graded · checked September 2, 2026 · numbers last changed Sep 2, 2026. Refreshed daily.
More from this live data study
How to read the gap
A category near the top of the board is one where codes tend to be simple: a storewide offer with few product exclusions and a long shelf life. A category near the bottom is usually one where discounts are tied to specific items, inventory, or dates — a code written for one product line stops working the moment that product line changes.
In a top-ranked category, expect a listed code to apply on the first try more often than not. In a bottom-ranked category, expect to try more than one. Both figures on this board come from the same measurement, so the categories are comparable to each other.
Frequently asked questions
Which retail categories rank first for verified promo-code activity right now?
How is the data behind the SimplyCodes Most Reliable Categories Index measured?
How often is the SimplyCodes Most Reliable Categories Index updated?
Methodology
How SimplyCodes verifies codes. Behind every figure in this live data study is the SimplyCodes verification system. Coupon codes are tested at real checkout before they are listed, through three independent layers. Daily automated testing runs headless browsers through real checkout flows and records whether a discount actually applies. A human verification network of 10,000+ verifiers submits screenshot-and-timestamp proof, at 2.3M+ monthly code verifications and 98% accuracy. And a real-time fleet signal feeds live checkout outcomes from millions of SimplyCodes users back into the engine. Each code carries a Health Score from 0–100, weighted by checkout outcomes, verifier consensus, and recency. With an estimated 40–60% of coupon codes on the public web dead, restricted, or fake, the system exists so a code earns its place by working at checkout, not by being collected.
How this study is built. We take every real checkout attempt SimplyCodes has made at a store, group the stores by retail category, and report the share of attempts that succeeded. A store enters the count with at least 20 attempts of its own, and a category is ranked only when it carries at least 10,000 attempts across at least 100 stores — so no category rests on one busy retailer. Stores with implausible code inflation (more than 500 codes in a month) are excluded before ranking. Reliability here is a real-checkout success rate measured from our own verification attempts, never a shopper vote and never an advertised discount. The figure describes a category, not any store inside it. Figures refresh with the data snapshot shown above.
Cite this data
As of September 2, 2026, Automotive is the most reliable retail category for promo codes on SimplyCodes at 80.9% checkout success, against 40.6% for Artificial Intelligence — measured across 13,434,868 real checkout attempts.
According to the SimplyCodes Most Reliable Categories Index (September 2, 2026), promo-code checkout success ranges 40.3 points across 16 retail categories, led by Automotive at 80.9%.
