Structure & headings

Data Cells in a Large Table Have No Header

In a big table, screen reader users hear each value with no row or column name, so they can't tell what the numbers mean.

td-has-headerWCAG 2.0Introduced in WCAG 2.0.Level AA — the minimum. Missing it blocks people outright.

Status: SeriousSerious — Significant friction, or information that is lost.Experimentalaxe-core has this rule, but runs it only when a team turns experimental rules on.
Owner: DesignDevContentTest
Audit: Automated+ManualA scanner finds it; a person confirms the fix.

Experimental rule. Experimental in axe-core: it runs only when a team turns experimental rules on, so a clean default scan says nothing about it. WCAG 1.3.1 Info and Relationships still applies.

Why it matters

Sighted people glance up to the column header and across to the row label. Screen reader users can't. They rely on headers marked in the code, which the screen reader reads out with each cell.

In a table of 3 by 3 or larger, without headers, every cell is just a bare value — "42", "Yes", "$80". People must count rows and columns in their head to make sense of it.

Who it affects

Who it affects, and how much
Who	What they experience	Impact
Screen reader users	They hear "42" as they move through cells, with no column or row name to explain it.	High impact
Low-vision users (magnification)	At high zoom they may lose sight of the headers and rely on a screen reader to fill the gap.	Partial impact
Cognitive and neurodivergent users	Affected only if they use read-aloud tools, which also need the headers marked up.	Partial impact

Business & product impact

Business & product impact, with how much each claim weighs
Area	Why	Impact
Legal	It fails WCAG 2.2 criterion 1.3.1 at Level A, the minimum. Complaints under Australia's Disability Discrimination Act and EN 301 549 point to it.	High impact
Conversion	Pricing, plan comparison and timetable tables become unusable, so people can't choose or buy.	Moderate impact
SEO	Little or no search benefit — don't sell it as one.	Low impact
Brand trust	Unreadable tables in reports or statements look careless to the people who rely on them.	Low impact
Cost to fix	Usually a small markup change. Fix it in the shared table component and every table benefits.	Moderate impact

Fixing it in code

A plan comparison table

Don't

<table>
  <tr><td>Plan</td><td>Price</td><td>Users</td></tr>
  <tr><td>Basic</td><td>$10</td><td>1</td></tr>
  <tr><td>Team</td><td>$40</td><td>10</td></tr>
</table>

A screen reader says: “$40”

<table>
  <tr><th scope="col">Plan</th><th scope="col">Price</th><th scope="col">Users</th></tr>
  <tr><th scope="row">Basic</th><td>$10</td><td>1</td></tr>
  <tr><th scope="row">Team</th><td>$40</td><td>10</td></tr>
</table>

A screen reader says: “Team, Price, $40”

th with scope tells the screen reader which headers belong to each cell.

A table used only for layout

Don't

<table>
  <tr><td>Logo</td><td>Menu</td><td>Search</td></tr>
  <tr><td>Intro</td><td>News</td><td>Events</td></tr>
  <tr><td>Footer</td><td>Links</td><td>Contact</td></tr>
</table>

A screen reader says: “Table, 3 rows, 3 columns. News”

<div class="grid">
  <div>Logo</div><div>Menu</div><div>Search</div>
  <div>Intro</div><div>News</div><div>Events</div>
  <div>Footer</div><div>Links</div><div>Contact</div>
</div>

A screen reader says: “News”

If it isn't data, don't use a table — use CSS grid for layout.

Designer's handoff note

In every data table design, mark which row and which column hold the headers.

Avoid tables with no visible headers. If a header is truly obvious, it still needs to exist in the code.

Quick test

Tool

NVDA (opens in a new tab) (free, Windows)

Duration

2 min

Checklist

Step 1: Turn NVDA on and open the page with the table.
Step 2: Press T to jump to the table.
Step 3: Hold Ctrl and Alt, then press the arrow keys to move between cells.
Step 4: Listen to a cell in the middle of the table.

Pass: You hear the row or column header before the value, like "Team, Price, $40".
Fail: You hear only the value, like "$40".

Check these at the same time

A table header cell has no text empty-table-header
A table's scope attribute is in the wrong place or misspelt scope-attr-valid
A table cell's headers attribute points to the wrong cells td-headers-attr
A table header has no data cells under or beside it th-has-data-cells

What a green scan still misses

A scanner checks that headers exist. It can't tell whether they are the right cells, or whether the header text makes sense when read aloud.

Reference

Status: ExperimentalExperimental in axe-core: it runs only when a team turns experimental rules on, so a clean default scan says nothing about it. WCAG 1.3.1 Info and Relationships still applies.
Rule ID: td-has-header
Raised by: axe-core: “Non-empty <td> elements in larger <table> must have an associated table header”
WCAG: 1.3.1 Info and Relationships (opens in a new tab) · Level A · since WCAG 2.0
Other standards: EN 301 549 9.1.3.1 · RGAA 5.7.4
Read more: Deque University: td-has-header (opens in a new tab)
Last reviewed: 16 October 2026