Why are people opening my LinkedIn Lead Gen Form but not submitting it?

TofuAnswer by the Tofu team · checked

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Usually the form asks for more than the ad earned, or some opens aren't real interest. LinkedIn's own advice for "high form opens but low lead volume" is to cut fields or rewrite the ad. Look for fields members have to fill in or edit (a phone number, work email, free-text questions), a big ask like a demo behind a cold feed ad, and taps on the ad text that open the form on mobile. Then check that the ad set optimizes for leads, not clicks, and send a test lead to rule out a broken form or sync.

As of October 2026.

How many fields should a LinkedIn Lead Gen Form have?

LinkedIn recommends three to four. A form can have up to 12 fields, and LinkedIn says "including fewer than the maximum of 12 fields will likely improve conversion rates." First name, last name and email are selected by default and count toward the 12, and so do custom questions, which members must answer to submit.

One third-party study questions the count but not the direction. Kiin Labs, a London LinkedIn Ads agency, studied Lead Gen Forms in its customers' accounts from September 8, 2025 to September 7, 2026. When the same accounts ran short forms (5 fields or fewer) and long ones (7 or more), completion showed no significant difference, but that test covered only 14 accounts. Across all accounts, feed forms with 3 or fewer fields had a median completion rate of 9.0%, against 4.0% for 8 or more. The clearest effect was one field: in 27 accounts that ran forms with and without a phone number, the phone field cut completion by 66% (95% interval 46% to 83%).

Can I remove fields from a form that's already running?

Not from a form attached to a Sponsored Content ad in an active ad set. There you can only edit the headline, details, privacy policy URL and text, confirmation message, landing page URL, thank you call-to-action and work email validation. To cut fields, duplicate the form (More, then Duplicate), edit the copy and attach it to a new ad. Editing an active form sends it back to review, and LinkedIn says ads using it "may stop serving" until it's approved.

Which fields make people give up?

In Kiin's data, the phone number field (see above). LinkedIn doesn't rank fields by drop-off. It pre-fills fields from each member's profile, but lists these as fields members can edit, so they may have to type them:

  • Work email address and work phone number
  • Personal email address and personal phone number
  • Gender, which is never pre-filled
  • Any field the member hasn't filled in on their profile
  • Single line text custom questions

The Validate work email option blocks common free domains such as Gmail. LinkedIn warns "the submission rates of your form might decrease if the member isn't willing to disclose their work email address." In Kiin's data, requiring a work email made no significant difference to completion (19 accounts). Turn validation on only if a personal address is no use to your sales team.

Are all those form opens real interest?

Not always, because LinkedIn counts opens broadly. Its help says clicks on Sponsored Content "that happen before the member submits their information through a Lead Gen Form are counted as a click and a lead form open." And on single image ads, taps on the intro text open the Lead Gen Form on mobile, while on desktop the same clicks go to your landing page if your copy includes a URL. So some opens may come from taps on the ad text rather than a decision to sign up, and a low completion rate doesn't always mean a bad form.

Does my ad match what the form asks for?

Check this first if the fields look fine. LinkedIn says "your message should clearly relate to the form," and for high opens with few leads it suggests "revising the verbiage in your creative." The offer itself matters most. In Kiin's customer accounts (median account with 100+ opens, September 8, 2025 to September 7, 2026), demo request forms in the feed completed 2.2% of the time, against 10.8% for content offers such as guides, reports and webinars. If you ask for a demo straight from a feed ad, a low rate is normal in that data.

What's a normal LinkedIn Lead Gen Form completion rate?

LinkedIn doesn't publish a benchmark. Campaign Manager reports Lead form completion rate as "form submissions divided by form opens." Kiin's figures, from the same panel and period, run from the median account to the start of the top quarter:

Where the form opensMedianTop quarter (at or above)
Feed ad, content offer10.8%18.7%
Feed ad, demo request2.2%4.2%
Message or conversation ad40.7%51.8%

These come from one agency's panel of its customers' accounts, so use them as a rough check and compare your own forms first. Hundreds of opens and zero leads is below every row, and Kiin saw that pattern often: of the lead gen campaigns that spent $100 or more with no leads in those 12 months, 85% had form opens but no submissions.

Is my ad set optimized for leads or for clicks?

Check the optimization goal in the ad set's bidding section. Lead generation ad sets can optimize for qualified leads, leads, clicks or impressions. With the clicks goal you bid manually and pay per click, and on a lead gen ad a click on the call-to-action is what opens the form, so you're paying for opens, not leads. With the Leads goal you pay by impressions on maximum delivery or cost cap, and by clicks on manual bidding (Enhanced); LinkedIn says "cost-per-lead is not available at this time." If you share qualified lead data through Conversions API (directly, through a partner or by uploading it), you can optimize for qualified leads, which only runs on maximum delivery.

How do I check the form isn't broken?

Send yourself a test lead:

  1. In Campaign Manager, click Content & Assets, then Lead generation forms.
  2. Click the form's name to preview it, or click More next to it and select Send Test Lead.
  3. Fill in the required fields and click Send. You can also submit through the ad preview from the Ads tab, which adds the ad and ad set IDs.
  4. Download the leads and look at the Test Lead column: TRUE marks a test.

A test lead doesn't change the leads count, which stays at 0 if you have no real leads. Also check the form is Active: LinkedIn reviews forms, and a valid privacy policy URL is required for approval.

Are people submitting, but the leads never reach my CRM?

Compare Campaign Manager with your CRM. On the Advertise page, open the campaign and choose Conversion & Leads from the Columns dropdown. If the Leads column shows leads your CRM doesn't, the form works and the sync is the problem: see how to send Lead Gen Form leads to HubSpot or Salesforce. If you use the work email field, don't confuse Leads with Leads (Work email), which counts only leads that don't use a free or personal email domain.

How do I reach people who opened the form but didn't submit?

Build a Lead Gen Form audience and retarget them. Click Plan, then Audiences, then Create audience, select Matched Audience, then Lead gen form. Choose how members engaged (opened or submitted), a time range of 30, 60, 90, 180 or 365 days, and the ad sets to draw from. It needs at least 300 matched members to run, and LinkedIn notes open counts "won't correspond directly to matched LinkedIn member accounts." Show openers a lighter offer or a message ad, and exclude people who already submitted.

Where Tofu fits

Tofu Ads Agent (our product) builds on-brand LinkedIn ads, including single image, carousel, document, video and conversation ads, with lead gen forms. It stages campaigns in your own ad account switched off, so a person reviews the form and ad set settings before anything runs, and you can ask its analytics agent about your account in plain language. Tofu doesn't change how LinkedIn counts form opens or pre-fills fields, and it can't make a cold demo ask complete like a content offer. The offer, the fields and the optimization goal are still yours to choose.

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