Retail-specific math
What surcharge or dual-pricing actually recovers.
On a $40,000/month card-volume retail business at a typical 2.7% effective rate, you're paying ~$1,080/month in processing. A correctly-rolled-out surcharge program recovers 70–85% of that (debit excluded by law). Dual pricing recovers closer to 95–100% when customer adoption is high. That's $9,000–13,000/year of recovered margin — directly to your bottom line.
Whether it's worth doing depends on your customer mix. We'll tell you honestly. Some retailers run surcharge for 6 months, see 20% of customers grumble, decide it's not worth it, and switch to a clean interchange-plus instead. Either decision is fine — we get paid the same way regardless of which placement wins.