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‹ PDP-035CRT-002 ›
CRT-001Cart · transparencyCritical

Cart shows full cost breakdown: items, shipping estimate, tax estimate

Cart shows full cost breakdown: items, shipping estimate, tax estimate.

Check my store for this rule →Cite this
Free · no card · runs all rules at once · judged on 40 stores · updated
10%of the audited stores we could judge fail this rule
11 pass25 partial4 failPublished audits · September 2026
Stores judged
40
of 40 published audits
Score weight
1.7pts
of the 100-point score
Page share
20%
of the score is the cart

What earns each verdict

Same outcomes on every UXFix rule · how verdicts work
✓ Pass11

All four components (subtotal, shipping, tax, total) visible on cart page.

~ Partial25

3 of 4 components shown.

✕ Fail4

Shipping and tax both hidden until later.

not assessable is recorded when the rule applied but the store could not be judged on it (bot protection, a region lock, a step we could not reach), and not applicable when the store has nothing for the rule to judge. Those stores are left out of every number on this page, never guessed. Why we do that
Why it matters

The cart does not show a full cost breakdown. Some of subtotal, shipping, tax, or total is missing before checkout.

Baymard research: 48% of shoppers abandon at checkout because of surprise costs. If the cart hides shipping or tax until the final step, you are training buyers to bail.

That sentence is the one a failing store sees in its own UXFix report.How rules are weighted and scored →
40 audited stores, one dot each
4 fail
PassPartialFail

Every published UXFix audit this rule could be judged on, as of 23 Sep 2026. A count of real stores, not a simulation of yours.

How we test it

Scripted walk, fresh signed-out browser · the full walk
  1. 1Fresh browserSigned out, cookies cleared, desktop and mobile viewports, the store's live theme.
  2. 2Open a productA real, in-stock product page, found the way a shopper finds one.
  3. 3Add to cartDefault variant, quantity one, then the cart page itself.
  4. 4Judge this ruleAgainst the standard above, on what a shopper can see.
  5. 5Record the verdictPass, partial or fail, saved with the screenshot it was judged on.
What the agent looks for
Cart shows full cost breakdown: items, shipping estimate, tax estimate.
Confidence
The rulebook rates this check’s confidence High. When the agent is not sure, the rule is recorded as not assessable rather than guessed.
Not judged
0 of 40 published audits: the rule did not apply or could not be judged. Dropped, never guessed.

The numbers behind the rule

Published UXFix audits · more statistics
Published audits failing this rule
No pictures here yet: none of the audits above saved a marked area for this rule.
Where this rule sits among 103 UX rules
Most-failed rank
#59
Score weight rank
#4
Fail rate
10%

Score weight: a fail costs 1.7 pts of of the 100-point score; a partial costs half that. Most-failed rank is among the 79 rules with enough published audits to report a rate.

The fix

The same steps a failing store sees in its report

A pass means: All four components (subtotal, shipping, tax, total) visible on cart page.

Severity
Critical
Score gain
+1.7pts
Page
Cart

Score gain is roughly what a fail-to-pass change adds; rules that could not be judged are left out, which can move it a little. Re-run a free audit after the change ships to confirm the verdict moved.

Checklist for the pass
0 of 3

Tick each step as you ship it. The audit judges the live store, so re-run it once all of them are done.

Every store that fails this rule

The 4 audited stores that fail Cart shows full cost breakdown: items, shipping estimate, tax estimate, with each store's published score and the day it was audited.
#StoreScoreAuditedPublished audit
1Bxbx.eu46Open audit
2Tomstoms.com52Open audit
3Ladounladoun.com41Open audit
4Enviafloresparadifuntosenviafloresparadifuntos.com56Open audit

What our auditors say about this rule

The cart is where the real price is finally said out loud. A total missing its shipping and its tax is not a total, it is an opening offer.
Omar Dabbas, Co-founder, UXFix

Written by the person who audits this rule, and reviewed every quarter.

What this rule rests on

The published research and standards this rule is drawn from. Open them and check the reasoning for yourself.

Keep going

All rules →
RuleCRT-002
Shipping estimator (ZIP/country) available in cartCart · High ›
RuleCRT-003
Tax shown or clearly labeled as calculated at checkoutCart · High ›
RuleCRT-005
Delivery estimate for each item visible in cartCart · Medium ›
RuleCRT-006
Discount/promo application shows explicit line item, not silent adjustmentCart · Medium ›
RuleCRT-007
Line items editable in place (qty, variant, remove) without page reloadCart · High ›
RuleCRT-010
Primary checkout CTA visually dominant on the pageCart · High ›
RuleCRT-011
Express wallet options (Apple/Google/Shop Pay) present in cartCart · High ›
RuleCRT-012
Express wallets do not visually compete with primary checkout CTACart · Medium ›
Cite this

«4 of 40 online stores audited by UXFix fail the rule "Cart shows full cost breakdown: items, shipping estimate, tax estimate" (CRT-001) as of September 2026. UXFix, uxfix.ai/audits/rules/full-cost-breakdown-in-cart»

Rule record · JSON
Dataset →
{
  "id": "CRT-001",
  "name": "Cart shows full cost breakdown: items, shipping estimate, tax estimate",
  "area": "cart",
  "severity": "critical",
  "weight": 1.739,
  "published_audits": {
    "judged": 40,
    "pass": 11,
    "partial": 25,
    "fail": 4
  },
  "updated": "2026-09-23"
}
Check your store

Does your store pass CRT-001?

One address, every rule, the verdicts with the screens they were judged on.

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