Picture a managed IT company that sells three-year support contracts to law firms and medical practices, at about $40,000 a contract. In February, the office manager at a 30-person law firm sees its LinkedIn ad and keeps scrolling. In early March she clicks a second ad and fills in the form. A call follows in April, a proposal in May, and the partners sign in July.
Check Campaign Manager in August for that deal. If the account is set up the way most are, you will find one conversion in March, a form fill, worth the same as every other form fill. The $40,000 contract does not exist anywhere in LinkedIn's reporting. As far as the platform knows, that ad produced a lead, and nothing came of it.
We have written before about why every ad platform runs on a different clock, so the numbers from Google, Meta and LinkedIn will never add up. This piece is about LinkedIn's own clock, and the two settings inside Campaign Manager that decide what it is allowed to notice. Most owners have never opened either one.
LinkedIn Only Credits What Happens Inside the Window You Set
Every conversion you track in LinkedIn has a conversion window, which LinkedIn also calls a lookback window. It is the length of time after someone interacts with your ad during which a conversion still counts as the ad's doing.
There are two of them, and they run separately:
The click window starts when someone clicks your ad. If they convert before it closes, LinkedIn records a click conversion.
The view window starts when someone is shown your ad, whether they click or not. If they convert before it closes, LinkedIn records a view-through conversion.
You choose each one from a short list: 1, 7, 30 or 90 days. LinkedIn credits the conversion to the most recent ad click or view from that person, and if one person converts several times inside the window, it counts once. Purchases and add-to-cart events are the exception; those count every time.
Run the law firm through it. She was shown an ad on February 3, clicked on March 2 and filled in the form on March 4. With a 90-day click window, that form fill counts, because it came two days after the click. Even a 7-day click window would catch it. The window is not the problem for the form fill. Hold that thought, because it is the whole argument of this piece.
LinkedIn Now Credits Ads for 90 Days by Default. Conversions Built Before the Change Still Stop at 30.
Here is the first thing to check, and it takes two minutes.
LinkedIn's help documentation now recommends a 90-day click and 90-day view window for most conversions, and says that is the default in Campaign Manager. It was not always. Two practitioner walkthroughs recorded in 2025, one on the Ben B2B channel in January and one from an agency tutorial in September, both show the default sitting at 30 days for clicks and 7 days for views.
So if your conversions were created a while ago, they may well still be on 30 and 7, because nobody goes back to change a setting they never chose in the first place.
That matters more than it sounds, because of one line in LinkedIn's documentation: a change to the conversion window only affects conversions counted after the change, and does not touch historic numbers. You cannot widen the window today and recover the deals that fell outside it last quarter. Every month a conversion sits on a short window is a month of reporting that stays short forever.
Go to Measure, then Conversion tracking, open each conversion and write down two things: the click window and the view window. If the conversion is a form fill, a booked call or anything else that sits near the end of your process, 90 days on clicks is the right answer for almost every small B2B business.
The Form Fill Happens in Week One. The Contract Signs in Month Five.
Now the part most advice about conversion windows skips.
Lengthening the window feels like it should fix the law firm problem. It does not, because the window only matters for the event you are counting, and most small businesses are counting the form fill. The form fill happens early. In the example, it happened two days after the click. A 90-day window is generous for it.
The event you actually care about is the signed contract, and LinkedIn's website tag will never see it at any window length. The Insight Tag, the snippet of code that reports conversions from your site, can only report what happens in a browser on your website. The proposal goes out by email. The contract gets signed over DocuSign or across a desk. The tag is watching a door the customer walked through in March and never came back to.
So there are two separate gaps, and they need two separate fixes:
The settings gap: your conversions may be on a window shorter than your buyers need. That is a dropdown.
The visibility gap: the outcome that pays your bills happens somewhere the tag cannot look. That needs your CRM to tell LinkedIn what happened.
The website tag was never late. It was standing at the wrong door.
Your CRM Can Report a Signed Deal Up to a Year After the Ad
This is the change most owners have not heard about.
When you send conversions to LinkedIn from your own systems, through LinkedIn's Conversions API or by uploading a CSV file of results, LinkedIn now lets some of them use a 180-day or 365-day window. Its help documentation lists seven conversion categories that qualify: Lead, Qualified Lead, Marketing Qualified Lead, Sales Qualified Lead, Purchase, Submit Application and Add to Cart. Conversions measured by the website tag stay on the 1, 7, 30 and 90-day menu.
If you have read older advice that offline conversions only get 90 days, that was true when it was recorded and it is not true now. It is the reason a lot of guides tell you to stop reporting at the qualified-lead stage, because a closed deal would usually land outside the window. With 365 days available, that compromise is no longer forced on you.
How to pick the stage to send, by how long your sales actually take:
Most deals sign within 90 days of the first click. Send a Qualified Lead or Sales Qualified Lead conversion the day your salesperson decides the inquiry is real, on a 90-day window. It arrives fast, so LinkedIn has something to learn from while the ad is still running.
Deals take three to twelve months. Send the qualified-lead stage on 90 days for speed, and add a second conversion for the signed deal, using the Purchase category with the contract value, on a 365-day window. The first tells LinkedIn who is worth talking to. The second tells it what that conversation was worth.
Deals take longer than a year. Report the furthest stage that reliably happens inside a year, usually the proposal or the qualified meeting, and accept that the signature belongs to your own books, not LinkedIn's.
We walked through the plumbing of sending CRM results back, including the monthly spreadsheet version that needs no developer, in teach LinkedIn which leads are actually worth having. The point here is narrower: when you set that conversion up, the window dropdown now goes to 365, and for a business with a long sales cycle it should.
One honest limit. LinkedIn can only credit a conversion it can match to a person it showed an ad to, so the reporting works best when the email on the deal is the email the buyer uses on LinkedIn. Some deals will never match. That is fine. You are not trying to make LinkedIn's count complete. You are trying to stop it from being blind to the deals that matter most.
One Form Fill Can Show Up as Four LinkedIn Conversions
The second setting sits right below the windows, and it is the one that makes LinkedIn reports look better than your sales pipeline.
When you create a conversion, you choose how credit is shared when one person has seen ads from more than one of your ad sets. (LinkedIn renamed its levels recently: what used to be a campaign group is now a campaign, and what used to be a campaign is now an ad set.) There are two choices:
Each ad set gives a conversion to every ad set the person interacted with inside the window.
Last ad set gives the conversion once, to the most recent ad set they interacted with.
Say the office manager at the law firm saw your awareness video, your retargeting ad and your Thought Leader Ad before she filled in the form, and clicked the retargeting ad. On "each ad set," all three ad sets report a conversion. Your ad-set rows now add up to three leads. Your inbox has one.
LinkedIn recommends "each ad set" for measuring across the whole funnel, and it has a point: it shows you every ad set that played a part, which is the honest picture of how a B2B buyer arrives. The trouble starts when someone adds those rows together and calls the total your lead count. Agencies that teach this screen single it out as the place most people go wrong, because once one form fill is counted three times, the number has stopped being a count of people.
The fix the practitioners we read keep landing on is to stop choosing and run both:
A "last ad set" version as your count of record. One form fill, one conversion. This is the number that goes in a report and gets compared against your inbox.
An "each ad set" copy of the same event for reading the path. This is the one you use to ask which ad sets keep showing up before people convert. Pair it with the demographics report, which tells you who those people were; we showed how to read it in LinkedIn tells you exactly who clicked.
Name them so nobody can confuse them, something like "Form fill - record" and "Form fill - path," and only ever add up the record version.
While you are in there, change your columns. Campaign Manager's Top conversions view breaks results out by conversion type, with a cost per conversion for each, so a pricing-page visit you track as a conversion stops sitting in the same total as a demo request. If your headline conversion number has been mixing page views with form fills, it has been flattering you.
A 90-Day View Window Credits Ads Nobody Remembers Seeing
Back to the windows, because the view window deserves its own argument.
A 90-day view window means that if someone was shown your ad at any point in the last three months and then converted, by any route at all, LinkedIn can count it. On LinkedIn, being shown an ad can mean it passed through someone's feed while they scrolled. They may never have looked at it.
LinkedIn recommends 90 days on views anyway, and for a channel whose main job is being seen by people who are not ready to buy, that is not an unreasonable position. We have made the case ourselves that LinkedIn's real work happens in the dark funnel, where nobody clicks.
But some practitioners who run LinkedIn alongside Google and Meta go the other way, setting their B2B clients to 90 days on clicks and just 1 day on views. Their reasoning: a buyer who is also seeing your Google and Meta ads can be credited by all three for the same scroll, and an impression that drifted past someone's thumb weeks ago says very little about why they bought.
Our position sits between the two. Keep the view window at LinkedIn's recommended length if you want to see the influence. But never add view-through conversions into the same number as click conversions when you are defending the budget. Campaign Manager shows them as separate columns. Report them separately. A click conversion is a person who came to you from the ad. A view-through conversion is a person who might have been nudged by it. Both are worth knowing. Only one survives the question "how do you know?"
If you are the one who has to answer that question in a budget meeting, the evidence that holds up is a short, checkable list of accounts, which we laid out in you cannot defend the LinkedIn line item, so it gets cut first.
Fifteen Minutes in Conversion Tracking Fixes the Next Year of Reports
None of this needs a developer to start. In order:
Write down what you have. Open Measure, then Conversion tracking. For every conversion, note the click window, the view window and the attribution model.
Fix the windows. Bottom-of-funnel conversions, form fills, booked calls and demo requests, go to 90 days on clicks. Decide your view window on purpose and write down why.
Split the count from the path. Make your main lead conversion "last ad set" and name it as the record. Add an "each ad set" copy for path analysis.
Add the deal. If you can export closed deals from your CRM, create a CSV or Conversions API conversion in the Purchase category, with the contract value and a 365-day window. Do the same for Qualified Lead on 90 days if your salesperson marks leads as real.
Mark the date. Write down the day you changed anything. Because window changes are not retroactive, reports from before and after that date measure different things, and comparing them will mislead you.
Judge the whole thing elsewhere. Even perfectly set up, LinkedIn is reporting on itself. The number that settles whether your advertising works is your total ad spend divided by your new customers, from your own books, the blended figure we explained in our piece on why you will never know exactly which ad made the sale.
The law firm deal is still worth $40,000 whether LinkedIn sees it or not. The only question is whether the next decision about your LinkedIn budget gets made by someone who knows it happened. Fifteen minutes in these settings is the difference between a report that says "one form fill in March" and one that says "a $40,000 contract in July, from an ad seen in February."
Setting up conversions that report what your sales actually look like is a big part of how we run LinkedIn ads for small B2B businesses, so if you would rather have someone else untangle it, we are glad to. If you would rather do it yourself, open Conversion tracking today and write down what your windows are set to. If they still say 30 and 7, you have found your first fix.
