How to Run a Co-Marketing Campaign (Step by Step)

Okay, let’s be honest: the phrase “how to run a co-marketing campaign” sounds so tidy and corporate that it hides the actually lovely thing underneath it. So here’s the short, honest answer first, the kind you can lift and use right away. To run a co-marketing campaign, you partner with a brand that shares your audience but isn’t your competitor, agree on one shared goal and the KPIs that prove it, put the scope, roles, timeline, cost and lead split in a written agreement up front, build one shared asset or offer together, promote it on a coordinated calendar across both brands with UTM-tagged links, and track everything in a shared dashboard so you can split credit and leads honestly. That’s the whole shape of it.

I know that sounds like a lot when you’re staring at a blank doc and a Slack thread with a brand you’re excited about. Deep breath. We’re going to walk through every piece slowly, in the order you’ll actually need it, with the messy human parts included — because the part nobody tells you is that co-marketing lives or dies on how clearly you agree up front, not on how clever your campaign concept is. I promise this gets easier once you’ve done it once.

What is a co-marketing campaign, really?

A co-marketing campaign is when two brands who serve the same audience — without competing for the same sale — team up to create and promote something together, then share the results. Think of a project-management tool and a time-tracking app hosting a webinar for freelancers, or a coffee roaster and a local bakery running a joint giveaway. You each bring your own audience to the table, you build one thing together, and you both walk away with new eyes on your brand and, ideally, new customers.

Here’s the distinction that trips people up. Co-marketing is not the same as an affiliate deal, where one party quietly earns a cut for sending traffic. It’s not influencer marketing, where you pay a creator to talk about you. Co-marketing is a genuine partnership of peers: shared effort, shared cost, shared audience, shared credit. That “shared” thread runs through everything, and it’s exactly why learning how to run a co-marketing campaign is really about learning how to be a clear, fair, generous partner. The tactics are easy. The trust is the work.

If you want the bird’s-eye view of how this fits into a broader partner strategy — choosing partners, structuring deals, the whole discipline — start with our pillar guide on how to do partnership marketing. This article zooms into the campaign itself, but that one gives you the map of the whole territory.

How do you find the right co-marketing partner?

Before any campaign design, you need the right dance partner, and this is where most co-marketing goes sideways. The temptation is to chase the biggest brand who’ll say yes. Resist it. The best co-marketing partner isn’t the largest — it’s the one whose audience overlaps with yours in interest but not in offer. Same people, different thing to sell them.

Run a potential partner through these questions before you get attached:

• Do we share an audience? Would their customers plausibly want what you make, and vice versa? A pet-food brand and a dog-walking app share dog owners. A pet-food brand and a competing pet-food brand share nothing but a fight.
• Are we truly non-competing? You should be able to send each other business without either of you losing a sale. If you’d both be pitching the same purchase, that’s not co-marketing, that’s an awkward standoff.
• Are our audiences roughly comparable in size? It doesn’t have to be identical, but a wild mismatch means one brand does most of the giving. That’s fine if you both agree to it openly — just don’t pretend it’s equal when it isn’t.
• Do our values and quality bars match? Your audience will judge you by the company you keep. Partner with someone whose content, tone, and ethics you’d be proud to stand next to.
• Is someone there actually excited? Campaigns run on human energy. A partner with a real champion inside their team will show up; a lukewarm “sure, I guess” partner will ghost you in week two.

When you reach out, lead with what’s in it for them, specifically. Don’t send a vague “want to collab?” Send a short note that names the shared audience, floats one concrete campaign idea, and makes it obvious you’ve thought about their side. Warm, specific, and generous beats big and impressive every time.

How do you set a shared goal and the KPIs that prove it?

Once you’ve found a partner who’s genuinely excited, resist the urge to jump straight into “so what should we make?” First, you both have to answer one question out loud: what does success look like, and how will we know we got there? If you skip this, you’ll finish the campaign, feel vaguely good or vaguely disappointed, and have no honest way to say whether it worked.

Pick one primary shared goal. Not five. One. It might be lead generation, brand awareness in a new segment, email-list growth, or driving trials of a shared offer. Then attach two or three KPIs that actually measure that goal — the numbers you’ll both look at when the dust settles:

• Lead generation: total registrations or sign-ups, cost per lead, and how many became qualified leads for each brand.
• Awareness: reach and impressions across both brands’ channels, new followers, and branded search or direct-traffic lift during the campaign window.
• List growth: new email subscribers captured, and opt-in rate on the shared landing page.
• Engagement: attendance rate for a webinar, content downloads, or interaction on the co-created posts.

Notice I’m not handing you target numbers to hit. I can’t, and no honest guide can, because your realistic targets depend entirely on your audience sizes, your niche, and what you’re offering. Instead, set your own baseline: look at what a solo campaign of yours typically pulls, talk openly with your partner about what theirs does, and agree together on a goal that would make you both genuinely happy. Write those numbers down where you can both see them. A shared goal you never wrote down is just two different private hopes waiting to collide.

How do you put it in writing before you build anything?

This is the heart of the whole thing, so I’m going to slow way down here. The single most important step in how to run a co-marketing campaign — more important than the concept, the design, or the promo plan — is getting your agreement in writing before you create a single asset. Not because your partner is untrustworthy. Because memory is unreliable, enthusiasm fades, and the friendliest partnerships turn tense the moment two people remember a “handshake deal” differently.

A good co-marketing agreement doesn’t have to be a scary legal monster. It has to be clear. At minimum, spell out:

• Deliverables. Exactly what each brand is responsible for producing and promoting. “You build the landing page and host the webinar; we design the graphics and write the emails.” No fuzzy edges.
• Timeline. Key dates — asset deadlines, launch day, promo window, and when the campaign officially ends. Put real dates, not “sometime in Q2.”
• Cost split. Who pays for what — ad spend, tools, prizes, design. Even if it’s 50/50, write it. Especially if it’s not 50/50.
• Lead and credit split. This is the one people avoid and then fight about. Decide up front how leads are shared. Do you both get every registrant? Does each brand keep the leads it personally drove? Is it split by contribution? Agree now, in writing, while everyone’s still smiling.
• Who owns what. Who owns the co-created content afterward, who can reuse it, and how each brand is credited. Can you both repurpose the webinar recording forever? Say so.
• Data handling. How shared contact data will be collected, stored, and used — and confirmation that everyone whose data you collect has actually consented to hear from both brands.
• An exit clause. What happens if it falls apart. How either party can bow out, what happens to shared assets and leads if they do, and how you’ll handle a launch that has to be postponed. An exit ramp isn’t pessimism; it’s kindness to your future selves.

Now, a genuine and important caveat, said plainly: I’m a marketer, not a lawyer, and none of this is legal advice. A co-marketing agreement is a real business document, and depending on what you’re sharing — customer data especially — you may have real legal obligations. Please have a qualified professional review anything before you both sign. Think of the checklist above as what to discuss and draft, then let a pro make sure it actually protects you both. Getting this right up front is the most respectful thing you can do for the partnership, and it’s what separates campaigns that end in a warm “let’s do that again” from ones that end in a cold email thread nobody wants to open.

And once it’s signed? Honor it. Do what you said, by when you said, at the quality you promised. Your reputation as a partner is the most valuable marketing asset you’ll ever build, and it’s made entirely of kept commitments.

What should the shared asset or offer be?

Now the fun part. With your goal, KPIs, and agreement locked, you get to build the actual thing you’ll promote together. The rule here is simple: it has to deliver real value to the shared audience, and it should naturally showcase both brands without feeling like a forced ad. Here are the formats that reliably work:

• A co-hosted webinar or live session. Each brand brings an expert, you teach the shared audience something genuinely useful, and registration captures leads for both. Fantastic for lead gen.
• A joint guide, report, or template. Co-write a downloadable resource that blends both brands’ expertise. Gated behind a simple sign-up, it grows both email lists.
• A product bundle or shared offer. Package your two offerings together at a combined value, or create a discount that only works when someone uses both. Great when your products genuinely complement each other.
• A giveaway or contest. Both brands contribute prizes, entrants follow or subscribe to both, and reach compounds. Powerful for awareness and audience growth — just follow each platform’s promotion rules.
• A content series or takeover. Swap audiences for a week — you create for their channels, they create for yours. Low cost, high trust-transfer.

Whatever you choose, co-create it. Resist the version where one brand does all the work and the other just retweets. The magic of co-marketing is that the shared audience sees two brands they can trust standing together, and that only lands when both are visibly, substantively involved. If you want to go deeper on structuring joint offers and collaborative content specifically, our guide on how to do co-marketing breaks down the formats and creative approaches in more detail.

How do you build a coordinated promo calendar across both brands?

You’ve built something wonderful together. Now both brands have to promote it in a way that feels coordinated, not chaotic — where your audiences see a unified push instead of two disconnected brands accidentally posting about the same thing on random days. This is where a lot of co-marketing quietly underperforms: the asset is great, but the promotion is a mess of missed handoffs and duplicated posts.

Build one shared promo calendar that both teams work from. Map it across the whole campaign window:

• Pre-launch (teasers). Both brands hint at something coming, ideally referencing each other. A little “we’ve been cooking something up with @partner” builds curiosity and signals the partnership early.
• Launch day. Coordinate your announcement posts to go out in a tight window so the campaign feels like an event. Tag each other, use a shared hashtag if it fits, and cross-share each other’s launch posts.
• Sustain (the promo window). Alternate and vary the angles — one brand shares a speaker highlight, the other shares a key takeaway, both point to the same UTM-tagged link. Divide the days so you’re not both shouting the same thing on the same afternoon.
• Last call. A coordinated final push before registration closes or the offer ends, from both brands, on the platforms where each performs best.
• Thank-you and recap. After it’s over, both brands thank the audience and share a result or highlight. This is where great partners plant the seed for round two.

Coordinating a calendar across two brands and a dozen possible platforms is genuinely fiddly if you’re doing it by hand in a spreadsheet and three group chats. This is exactly the kind of thing a scheduling tool is built for — you draft the whole cross-brand calendar in one place, queue every post to publish at the right moment on each network, and both teams can see what’s going out and when. No more “wait, did you post yet?” at 9pm. If you’re managing multiple accounts across the campaign, having a single shared queue keeps everyone honest and on-beat.

How do you track results fairly and honestly?

Here’s a promise I’ll make you: tracking is what turns co-marketing from a nice vibe into a repeatable growth channel. Without it, you’ll never know what worked, and worse, you and your partner will each quietly assume you drove most of the results — which is exactly how good partnerships curdle. So build tracking in from day one, not as an afterthought.

The two workhorses:

• UTM parameters. Give each brand — and ideally each channel and each major post — its own UTM-tagged version of the campaign link. This is how you’ll actually see which traffic came from where. When your partner’s Instagram link and your LinkedIn link are tagged differently, attribution stops being a guessing game and becomes a fact you can both look at.
• A shared dashboard. Both partners should look at the same numbers, from the same source, at the same time. Whether it’s a shared analytics view, a live spreadsheet pulling from your link data, or a reporting tool you both access, the point is one source of truth that neither side can privately spin.

And now the ethical spine of the whole campaign, the thing I care about most: report honestly, even when honest is less flattering to you. It is genuinely tempting, when you’re staring at the results, to quietly claim credit for leads your partner actually drove, or to fudge attribution so your side looks like the hero. Don’t. Ever. The whole model depends on both parties trusting the numbers. If your UTMs show that 70% of registrations came through your partner’s channels, that’s the truth you report, gladly. Honest shared reporting is not just the right thing — it’s the thing that gets you invited to the next campaign, and the one after that.

For a fuller framework on picking the right metrics and proving the return on these partnerships, we go deep in how to measure partnership marketing — it pairs perfectly with the tracking setup here.

How do you split credit and leads fairly?

You wrote the lead split into your agreement (you did, right?), so now you’re just executing it honestly against the data. But let’s talk about the spirit of it, because the mechanics are only half the job.

There are a few fair ways to split, and none is universally “correct” — it depends on what you agreed:

Split approach	How it works	Best when
Shared pool	Both brands get access to every lead who opted in to hear from both.	Truly joint offers with balanced contribution and clear double opt-in consent.
Source-based	Each brand keeps the leads its own channels drove, tracked by UTMs.	Partners want a clean, self-evident division tied to real effort.
Contribution-weighted	Leads or credit split by an agreed ratio reflecting each side’s investment.	One partner brings notably more audience, budget, or production.

Whichever you pick, two rules keep it clean. First, only share the leads people consented to share. If someone signed up expecting to hear from both brands, wonderful — that’s a legitimately shared lead. If they only consented to one, that data stays with one. Never pass contacts to a partner that those contacts didn’t agree to receive. Second, credit your partner generously in the recap. When you tell your boss or your audience how the campaign went, name your partner’s contribution honestly and warmly. Generosity with credit is remembered, and it’s how you become the brand everyone wants to partner with.

What legal and ethical rules can’t you skip?

Quick but non-negotiable, because getting this wrong can cost you far more than any campaign is worth. A few things to build in from the start:

• Disclose paid or sponsored elements. If any part of your co-marketing involves payment, sponsorship, or material incentives — say one brand is paying the other, or there’s an affiliate arrangement layered in — that has to be disclosed clearly to your audience. In the U.S., the FTC looks at the function of the relationship, not the label you slap on it. When in doubt, disclose. Honest and obvious beats clever and hidden, always.
• Handle data with real consent. Any contact information you collect and share between brands must be collected with clear, informed consent — people need to know both brands will be reaching out. Use a visible double opt-in, store data securely, and honor privacy laws that apply to your audience. Shared leads are only a gift if they were freely given.
• Get the agreement reviewed. As I said earlier and will happily say again: the written agreement is essential, and a qualified professional should look it over. Not because I’m being cautious for caution’s sake, but because you’re making real commitments about money, data, and ownership.
• Make no guarantees. Don’t promise your partner a specific number of leads or sales, and be wary of any partner who promises you one. Honest co-marketing shares effort and upside; it can’t guarantee outcomes, and anyone claiming otherwise should make you nervous.

None of this is meant to scare you off. It’s meant to let you run co-marketing campaigns for years without a single relationship or regulator souring on you. Ethics here isn’t a constraint on growth — it is the growth strategy, because it’s what makes brands say yes to you again and again.

What happens after the campaign ends?

The campaign wrapping up is not the finish line — it’s the part that decides whether you ever do this again. Two things to do while it’s fresh.

First, run an honest post-mortem together. Get on a call with your partner, pull up the shared dashboard, and walk through it as peers: What did we hit? What did we miss? What surprised us? What was clunky in the handoffs? What would we change? Write down the takeaways while you both remember them. A generous, honest post-mortem is a gift to your future partnership — and it’s where the “let’s do an even better one next quarter” conversation naturally begins.

Second, nurture the leads and the relationship. The contacts you earned deserve genuine follow-up, not a cold silence until you need something. And the partner you just succeeded with is now a warm, proven relationship — the hardest kind to build. Stay in touch, cheer them on, and you’ll have a co-marketing ally for years, not just one campaign.

Your co-marketing campaign workflow, start to finish

Let’s pull it all together into something you can start today. Here’s the repeatable workflow for how to run a co-marketing campaign without losing your mind or your friendships:

• 1. Find an aligned partner. Shared audience, non-competing offer, matching values, a real champion on their side.
• 2. Set one shared goal and 2-3 KPIs. Decide together what success means and how you’ll measure it. Baseline it against your own past campaigns, not made-up targets.
• 3. Put it in writing. Deliverables, timeline, cost split, lead split, ownership, data handling, exit clause. Draft it together, then have a professional review it.
• 4. Co-create one shared asset or offer. A webinar, guide, bundle, or giveaway that genuinely serves the shared audience and showcases both brands.
• 5. Build a coordinated promo calendar. Teasers, launch, sustain, last call, recap — mapped across both brands and every relevant platform, scheduled in one place.
• 6. Track with UTMs and a shared dashboard. One source of truth. Tag every link, watch the same numbers together.
• 7. Split leads and credit honestly. Execute your agreed split against real data, share only consented leads, and credit your partner generously.
• 8. Debrief and nurture. Run a warm post-mortem, follow up with leads, and tend the partner relationship for round two.

That’s it. That’s the whole system. The first time through, it’ll feel like a lot of moving parts — but I promise, once you’ve run one clean, honest, well-tracked co-marketing campaign, you’ll wonder why you ever tried to grow entirely alone. You’ve got this.

Frequently asked questions

What’s the difference between co-marketing and a partnership?

Partnership marketing is the broad discipline of growing through other brands — it includes affiliates, referrals, integrations, and more. A co-marketing campaign is one specific type: two non-competing brands who share an audience jointly create and promote something, then share the results. Think of co-marketing as one focused campaign living inside the larger world of partnership marketing.

How do you split leads in a co-marketing campaign?

Decide the split in writing before you launch. Common approaches are a shared pool where both brands get every consented lead, a source-based split where each brand keeps the leads its own channels drove (tracked by UTMs), or a contribution-weighted split by an agreed ratio. Whichever you choose, only ever share leads that consented to hear from both brands, and honor your agreement honestly.

Do I need a written agreement for a co-marketing campaign?

Yes, and it’s the most important step. A written agreement covering deliverables, timeline, cost split, lead split, ownership, data handling, and an exit clause prevents the misunderstandings that sink friendly partnerships. It’s not legal advice to draft one, but because it involves real commitments about money and data, have a qualified professional review it before both sides sign.

How do you measure whether a co-marketing campaign worked?

Set one shared goal and two or three KPIs up front, then track against them with UTM-tagged links and a shared dashboard both partners can see. Depending on your goal, you’ll watch registrations, cost per lead, reach, new subscribers, or engagement. Baseline your targets against your own past campaigns rather than any generic benchmark, and report the numbers honestly to each other.

Do you have to disclose a co-marketing partnership to your audience?

If any part of the campaign involves payment, sponsorship, or a material incentive between the brands, yes — you should disclose it clearly. In the U.S., the FTC evaluates the function of the relationship, not the label, so when there’s a financial arrangement behind the content, make it obvious to your audience. Transparent disclosure protects your credibility and keeps you on the right side of the rules.