Most demand generation advice is written for a ninety day close. If you sell something complicated to someone technical, that advice will quietly waste a year of your budget.
Here is the number that reframes almost every marketing conversation I have with a technical founder: the average B2B sales cycle ran 10.1 months in 2025, according to 6sense's annual buyer experience research. Not ten weeks. Ten months. And that is the average, pulled across every kind of B2B purchase, including plenty of software that gets bought on a credit card.
If you sell into energy, nuclear, manufacturing, or security, your cycle is not the average. It is the long tail of the average.
I want to be careful here, because this is where most marketing writing starts cheating. The honest picture is that cycle length has not moved in one direction. Ebsta and Pavilion, looking at 4.2 million opportunities and $54 billion in revenue across 530 companies, found cycles grew 16% in the first half of 2023 compared to 2022, and were 38% longer than in 2021. Then 6sense found the opposite between 2024 and 2025, with the average falling from 11.3 months to 10.1. Anyone who tells you sales cycles are simply getting longer forever is selling you something.
What has not changed is the shape of a complex purchase. And the shape is what should be driving your plan.
The room is bigger than you think
Forrester's most recent State of Business Buying research puts the typical B2B purchase decision at 13 people inside the buying organization plus 9 external influencers. Twenty two people, in various states of attention, most of whom your sales team will never speak to.
6sense's number is directionally the same: 10 or more people on the buying committee, and holding steady year over year.
Sit with that for a second, because it explains almost every frustrating thing about marketing a technical product. The demo went beautifully and the deal died. Someone in procurement had a question nobody surfaced. The engineer loved it and the CFO had never heard of you. A champion left for another company and took the whole thing with her.
None of that is a lead generation problem. It is a coverage problem. Your story has to survive being retold by someone who does not work for you, to people you have never met, over the better part of a year.
Most of the decision happens before you know it exists
6sense found that 61% of the buying journey was already complete before a buyer first contacted any vendor in 2025. That is actually down from 69% the year before, which is worth noting honestly. Buyers are reaching out a little sooner than they were.
Sooner is still late. Six tenths of the decision, made in your absence, by a group of people reading your website, your competitors' websites, an analyst note, a Reddit thread, and whatever their colleague at another utility told them over coffee.
And there is a harder finding underneath it. Research attributed to Forrester and reported in the trade press found that 92% of buyers begin the process with at least one vendor already in mind, and 41% have a single preferred vendor before formal evaluation starts. If that holds, then a large share of B2B buying is not selection. It is confirmation of a decision someone already made.
Which means the marketing that matters most is the marketing that happened months before the opportunity appeared in your CRM.
Why your attribution report is lying to you
Here is where long cycles get expensive in a way most founders do not see coming.
6sense's 2025 metrics research found that B2B buying groups now generate 150 to 200 digital touchpoints per vendor. Meanwhile, roughly 58 to 60% of marketing teams are still using multi-touch attribution models, and only about 18 to 20% use statistical or causal methods.
Multi-touch attribution was built for a world with a handful of touches and a short window. Point it at two hundred touchpoints spread over ten months and it does not fail loudly. It fails quietly, by handing you a confident looking report that credits the last form fill and ignores the eleven months of work that made the form fill possible.
Then someone reads that report and cuts the budget for the thing that was actually working.
The most dangerous marketing report is the one that is precisely wrong rather than roughly right.
What to do instead
Budget in cohorts, not months. If your cycle is ten to eighteen months, then spend from this quarter shows up as revenue three or four quarters out. Group your pipeline by the quarter it entered, and judge each cohort as it matures. Monthly marketing reviews against monthly revenue will make good work look like failure every time.
Pick leading indicators you actually believe. Not vanity metrics, and not revenue you cannot possibly have earned yet. Things like: how many accounts in your target list have more than one person engaging. Whether you are reaching the roles that show up late and kill deals. Whether the same objection keeps appearing at the same stage.
Arm the champion, not just the buyer. Somebody inside that company is selling for you in meetings you will never attend. Give them a one page business case, the security and compliance answers before procurement asks, and the number their CFO will want. This is the highest leverage marketing you can do in a long cycle, and almost nobody does it.
Fix the website and sales story together. Gartner found that 69% of B2B buyers report inconsistencies between what a vendor's website says and what its sales reps tell them. In a ten month cycle, that inconsistency gets discovered. It always gets discovered.
The part nobody wants to hear
If your sales cycle is a year, your marketing needs a year of runway before anyone can fairly judge it. Not a year of doing nothing measurable. A year of measuring the right things and being honest that revenue is the last one to arrive.
The companies that win in long cycle categories are almost never the ones with the cleverest campaign. They are the ones who were still there, saying the same clear thing, in month fourteen, when the buying committee finally got budget approved and someone said the words that decide most of these deals: we already know who we're going with.