The .99 vs .00 Debate: What Ending Digits Actually Do to Your Net Profit

Every pricing article online rehashes the same 1970s research: prices ending in .99 outperform prices ending in .00 because the left-digit anchor matters more than the full number. Most of that research is real but drowned out by later experiments with more nuance. What actually matters to a seller in 2026 is not whether .99 beats .00 by a small margin — it is that marketplace fees tier in ways that make certain prices disproportionately bad, and those tier boundaries have shifted since 2024.

The charm effect, honestly measured

Meta-analyses through 2023 put the lift from charm pricing (.99 vs .00) at a real but modest 3–8% on everyday consumer items. It evaporates on luxury goods, where round numbers signal quality, and it is weaker on subscription or recurring purchases where buyers anchor on the total. It is strongest on first-time impulse purchases under $50 — which happens to describe a large slice of Etsy and eBay.

What the analyses often miss: in marketplace search, the displayed price is sometimes truncated or the cent value hidden in the main price panel. On mobile Etsy, $19.99 is displayed as $19.99 on the tile; on Amazon's same-screen mobile grid, prices over $19.99 drop the cents entirely — $20 renders indistinguishably from $19. Check your own category's mobile rendering before you commit to a strategy.

Where the real money is: fee tiers

Amazon's referral-fee bands

For most categories Amazon charges a flat 15% referral with a $0.30 minimum. For some categories (beauty, consumer electronics) the rate drops to 8% on portions of the sale above a threshold — $10.00 in beauty, $100 in some electronics subcategories. A beauty item priced at $10.00 pays 15% = $1.50. A beauty item priced at $9.99 pays 8% = $0.80 — because the whole sale sits below the threshold. That is a 7-percentage-point margin swing on a one-cent price change.

eBay's Promoted Listings thresholds

eBay's Promoted Listings Standard recommends ad rates by category; the recommended rate changes at price breakpoints (typically $25, $50, $100). A listing at $24.99 gets recommended ad rate X; at $25.00 it jumps to X+1.5 percentage points. If you follow recommended rates blindly (many sellers do), pricing just under the breakpoint saves you ad spend with negligible conversion cost.

FBA size and weight tiers (the big one)

This is not about price endings — it is about dimensions — but the principle is the same. Amazon's FBA fee jumps at tier boundaries: small-standard ends at 1 lb, large-standard at 3 lb. A 16.1 oz item pays small-standard ($3.27), a 16.5 oz item pays the next band up ($4.11). If your item is hovering near a tier break, shaving packaging weight by half an ounce is worth $0.84 per unit sold.

When round numbers actually win

Round numbers ($20, $50, $100) outperform charm pricing on three specific categories:

• Luxury and premium-positioned goods: $120 reads as higher quality than $119.99, which reads as discount.
• Gift items: People giving as gifts round up mentally regardless, so the charm-digit friction doesn't help.
• Subscription or bundle pricing: Buyers compute monthly totals; $29.99 × 12 is harder mental math than $30 × 12.

A/B testing pricing on marketplaces

Amazon's Manage Your Experiments feature (expanded to pricing in late 2025) lets Brand-Registered sellers A/B test title, images, and now listing price in a controlled split. Run a 14-day test across a breakpoint (e.g. $19.99 vs $20.99) rather than a charm test ($19.99 vs $20.00) — the signal is stronger and actionable, and it answers a question you actually cared about: is the higher price accepted?

The under-used .95 ending

In Etsy and Shopify A/B tests through 2024–2025, .95 endings performed roughly equal to .99 on conversion but lifted perceived-quality scores by about 4%. The theory: .99 reads as discount-store; .95 reads as intentional. Worth testing on your own listings, particularly in handmade and design-oriented categories.

The bottom line for 2026 pricing

1. Fee tiers trump charm pricing. Find the tier breakpoints first.
2. Use .99 or .95 by default on items under $50, unless you are intentionally premium-positioning.
3. Use round numbers on premium or gift items above $50.
4. Re-examine FBA size and weight — half an ounce of packaging can be worth more than a dollar of pricing.

Price every candidate through the OmniProfit calculator at the candidate price minus $0.01 and plus $0.01. If the break-even shifts appreciably across those three values, you are near a tier boundary and charm pricing is secondary. If the numbers move smoothly, you have a pure conversion question — and .99 probably wins by a little.