Pattern #1: Remove Coupon Fields

Pattern #1  Tested 10 timesFirst tested by Herman Klein Recently tested by Joachim Furuseth on Mar 24, 2026

With A Total Of 2.5 Evidence For Version B It Is Likely Better

LOSSES
-5
-4
-3
-2
-1
FLAT
+1
+2
+3
+4
+5
WINS

Measured by the sum of negative and positive tests.

A B
Remove Coupon Fields (Variant A) Remove Coupon Fields (Variant B)

Expected Median Effects Of B

6%

Progression

(1 tests)

-

Leads

-

Signups

-

Engagement

0.8%

Sales

(9 tests)

15%

Revenue

(2 tests)

-

Retention

-

Referrals

1.2%

ANY PRIMARY

(10 tests)

All 9 tests meta-analyzed: +0.5% combined effect (p-val 0.1335)

84.6% of 90% cumulative power target at 1% MDE from 9 tests Help replicate this with an A/B test

90%
↓
15.6% 7.4% 9.1% 5.2% 19.7% 19.7% 11.4% 51.5% 17.7%
Shopping Cart 2 tests: +0.2% (p 0.8088)
Checkout 7 tests: +0.6% (p 0.1163)

Tested on

Tests

Sorted by:

Pattern #1: Remove Coupon Fields
Was Tested On Obsbygg.no by Joachim Furuseth

Test # 635 on Obsbygg.no by Joachim FurusethJoachim Furuseth Feb 18, 2026 Meta Test link

Variation B Was Likely Better

  • Measured by completed transactions   |  p-val 0.2258

  • A: 45.4% (6258 successes out of 13797 visitors)
  • B: 46.1% (6260 successes out of 13583 visitors)
Zoom In
Remove Coupon Fields - Variant A A
Remove Coupon Fields - Variant B B
Checkout Removed Isolated
Statistical Power by Minimum Detectable Effect
6%0.5%
11.4%1%
32.6%2%
80%3.7%
96.5%5%
99.9%10%+

Removed

Isolated

The control had a clickable link "Use discount code" which would reveal an input field for a coupon code. The variation removed this link and input field. Impact on purchases was measured. (Desktop only)

Test # 640 on Obs.no by Joachim FurusethJoachim Furuseth Mar 24, 2026 Meta Test link

Variation B Was Insignificant

  • Measured by compl   |  p-val 0.6799

  • A: 50.9% (10463 successes out of 20568 visitors)
  • B: 51.1% (10513 successes out of 20584 visitors)
Zoom In
Remove Coupon Fields - Variant A A
Remove Coupon Fields - Variant B B
Checkout Removed Isolated
Statistical Power by Minimum Detectable Effect
7%0.5%
17.7%1%
54.2%2%
80%2.7%
99.9%5%+

Removed

Isolated

The control had a clickable link "Use discount code" which would reveal an input field for a coupon code. The variation removed this link and input field. Impact on purchases was measured. (Desktop only)

Test # 639 on Obs.no by Joachim FurusethJoachim Furuseth Mar 23, 2026 Meta Test link

Variation B Was Insignificant

  • Measured by completed transactions   |  p-val 0.3999

  • A: 45.9% (43145 successes out of 93901 visitors)
  • B: 46.1% (43201 successes out of 93628 visitors)
Zoom In
Remove Coupon Fields - Variant A A
Remove Coupon Fields - Variant B B
Checkout Removed Isolated
Statistical Power by Minimum Detectable Effect
17%0.5%
51.5%1%
80%1.4%
97.9%2%
99.9%5%+

Removed

Isolated

The control had a clickable link "Use discount code" which would reveal an input field for a coupon code. The variation removed this link and input field. Impact on purchases was measured. (Mobile only)

Test # 634 on Obsbygg.no by Joachim FurusethJoachim Furuseth Feb 18, 2026 Meta Test link

Variation B Was Insignificant

  • Measured by completed transactions   |  p-val 0.8891

  • A: 42.4% (14086 successes out of 33194 visitors)
  • B: 42.5% (14173 successes out of 33357 visitors)
Zoom In
Remove Coupon Fields - Variant A A
Remove Coupon Fields - Variant B B
Checkout Removed Isolated
Statistical Power by Minimum Detectable Effect
8%0.5%
19.7%1%
60.1%2%
80%2.5%
99.9%5%+

Removed

Isolated

The control had a clickable link "Use discount code" which would reveal an input field for a coupon code. The variation removed this link and input field. Impact on purchases was measured. (Mobile only)

Test # 393 on Snocks.com by Melina HessMelina Hess Jan 19, 2022 Meta Test link

Variation B Was Likely Worse

  • Measured by completed transactions   |  p-val 0.0691

  • A: 59.4% (9922 successes out of 16712 visitors)
  • B: 58.4% (9847 successes out of 16863 visitors)
Zoom In
Remove Coupon Fields - Variant A A
Remove Coupon Fields - Variant B B
Shopping Cart Replaced Isolated
Statistical Power by Minimum Detectable Effect
8%0.5%
19.7%1%
60.1%2%
80%2.5%
99.9%5%+

Replaced

Isolated

This experiment replaced a visible coupon field with a dynamic text link that would initially hide the form field. Only after clicking the text link would the coupon form field appear. The translation from German is "Do you have a coupon code? Click here to apply". Impact on completed transactions was measured.

Test # 389 on Svsound.com by Keenan DavisKeenan Davis Dec 16, 2021 Meta Test link

Variation B Was Insignificant

  • Measured by total revenue   |  p-val 0.0870

  • Measured by completed sales   |  p-val 0.2878

  • A: 17.3% (1761 successes out of 10188 visitors)
  • B: 17.9% (1809 successes out of 10133 visitors)
Zoom In
Remove Coupon Fields - Variant A A
Remove Coupon Fields - Variant B B
Checkout Replaced Isolated
Statistical Power by Minimum Detectable Effect
4%0.5%
5.2%1%
9.6%2%
37.2%5%
80%8.6%
89.9%10%
99.8%15%
99.9%20%

Replaced

Isolated

In this simple experiment, a highly visible coupon field was replaced with a less visible (but clickable) link in the variation. Clicking on the link would show the coupon field. Impact on sales and revenue was measured.

Test # 274 by Someone Someone Dec 16, 2019 Meta Test link

Variation B Was Insignificant

  • Measured by completed transactions   |  p-val 0.6155

  • A: 80.9% (1590 successes out of 1965 visitors)
  • B: 81.5% (1538 successes out of 1886 visitors)
Zoom In
Remove Coupon Fields - Variant A A
Remove Coupon Fields - Variant B B
Checkout Replaced Isolated
Statistical Power by Minimum Detectable Effect
5%0.5%
9.1%1%
24.4%2%
80%4.3%
90.2%5%
99.9%10%+

Replaced

Isolated

In this experiment, a fully visible coupon field (A) was made less visible by turning it into a default collaped link (B). Clicking on the link caused the coupon field to appear.

Test # 145 on Normanrecords.co... by Nathon RaineNathon Raine Jan 18, 2018 Meta Test link

Variation B Was Likely Better

  • Measured by completed sales   |  p-val 0.2076

  • A: 72.0% (1502 successes out of 2086 visitors)
  • B: 73.7% (1514 successes out of 2053 visitors)
Zoom In
Remove Coupon Fields - Variant A A
Remove Coupon Fields - Variant B B
Checkout Replaced Isolated
Statistical Power by Minimum Detectable Effect
4%0.5%
7.4%1%
17.5%2%
73.7%5%
80%5.4%
99.9%10%+

Replaced

Isolated

In this test the coupon field was replaced with a small link that would bring the field back if needed. This is a more suble approach than just completely removing the coupon field. It still allows for the use of coupon fields by those customers which are truly searching for a way to enter their aquired codes.

Test # 42 on Adoramapix.com by Herman KleinHerman Klein May 11, 2016 Meta Test link

Variation B Was Better

  • Measured by visits to shopping cart   |  p-val < 0.0001

  • Measured by post-purchase page visits   |  p-val 0.0128

  • A: 72.8% (5576 successes out of 7655 visitors)
  • A: 70.1% (5365 successes out of 7655 visitors)
  • B: 77.2% (6072 successes out of 7861 visitors)
  • B: 71.9% (5652 successes out of 7861 visitors)
Zoom In
Remove Coupon Fields - Variant A A
Remove Coupon Fields - Variant B B
Shopping Cart Removed Isolated
Statistical Power by Minimum Detectable Effect
7%0.5%
15.6%1%
47.9%2%
80%2.9%
99.8%5%
99.9%10%+

Removed

Isolated

Test # 121 on Bionicgloves.com by VWO VWO Mar 13, 2015 Test link

Variation B Was Better

Zoom In
Remove Coupon Fields - Variant A A
Remove Coupon Fields - Variant B B

Source: vwo.com/blog/promo-code-box-ecommerce-website-bleeding-dollars-ab-test/

Shopping Cart Removed Isolated

Removed

Isolated

VWO.com published this test which removed two coupon fields on a shopping cart: a gift card code and a special offer code.

Related Patterns

For each pattern, we measure three key data points derived from related tests:

REPEATABILITY - this is a measure of how often a given pattern has generated a positive or negative effect. The higher this number, the more likely the pattern will continue to repeat.

SHALLOW MEDIAN - this is a median effect measured with low intent actions such as initiating the first step of a lengthier process

DEEP MEDIAN - this is derived from the highest intent metrics that we have for a given test such as fully completed signups or sales.