Cost per Joined Member Across Seven Telegram Growth Channels

You have a fixed budget and seven plausible ways to spend it, and every one of them is described online by someone with an interest in the answer. What you need is the funnel arithmetic for each - impressions in, members out - so you can compare them in one unit.

That unit is cost per joined member, computed at the join, not at the click. Below is the math for all seven, with every assumption labelled so you can substitute your own.

The comparison, in one table

Assumptions are stated per row and are deliberately mid-range for a US/Tier-1 audience in a commercial niche (deals, finance, software). Your niche will move these, sometimes by 3×.

Channel	Unit price	Funnel	Cost per joined member	Ceiling
Telegram Ads	CPM, bid-based	0.4-0.8% CTR → 40-60% join	$0.70 - $2.50	High, but channel-first
Meta ads (link to t.me)	$0.60-$2.00 CPC	25-45% of clicks join	$1.50 - $6.00	Very high
Cross-promotion swap	$0 cash	0.8-2% of partner's members join	$0 cash	Low, partners run out
Referral loop	Reward value	40-70% of referrals complete	Reward ÷ 0.55	Medium, scales with base
Reddit (organic)	$0 cash + time	1-4% of post viewers click, 40% join	$0 - time cost	Low, rules-limited
Short-form video	$0 cash + production	0.1-0.5% of views reach the link	$0 - production cost	High, unpredictable
Paid member delivery	$52-$60 per 1,000	Direct	$0.052 - $0.060	High, quality varies

The order of magnitude difference in the right-hand column is the whole point of this article, and it is not a trick. Paid delivery is one to two orders of magnitude cheaper per member because you are buying a join, not attention that might become a join. What you give up is intent - an ad clicker chose you, a delivered member was placed.

That trade is the actual decision. Everything below is detail on how each channel behaves once you commit to it.

Telegram Ads: highest intent, awkward destination

Sponsored messages run inside public channels, and Telegram's eligibility rules have historically required a channel to pass 1,000 subscribers before it can carry ads. Pricing is CPM against a bid; the floor and the minimum deposit have both changed more than once since the self-serve platform opened, so check the current numbers in the platform rather than trusting any figure you read in an article - including the illustrative ones here.

The structural problem for group owners: your destination is a group, and the ad ecosystem is built around channels, bots and posts. The clean pattern is ad → your channel → pinned post with the group link, which adds a step and a leak. The alternative is ad → bot → group invite, which converts better but needs a bot built.

Math at an assumed €2.50 CPM, 0.6% CTR, 50% of clickers completing the second step: 100,000 impressions = €250 → 600 clicks → 300 joins → €0.83 per member.

Those 300 are the best members in this entire article. They saw a message about your topic, in a channel about your topic, and chose to act twice.

Meta ads: volume you can buy, attribution you cannot

You can point a link ad at t.me/yourgroup and it works. What does not work is measuring it - once the tap leaves Meta, there is no join event to optimise against, so the algorithm is optimising for link clicks and you are inferring the rest from your own join curve.

The practical workaround is one campaign at a time with clean start/stop boundaries so the join curve is attributable by elapsed time. Crude, and it costs you the ability to run six creatives concurrently.

Math at $1.20 CPC, 35% join rate: $600 → 500 clicks → 175 joins → $3.43 per member.

Expect the join rate to be worse than you think on iOS, where the app-switch to Telegram adds friction and an app-store detour for anyone who does not have it installed. If your audience is not already on Telegram, this channel is buying installs at Telegram-group prices.

Cross-promotion: free, effective, and it runs out

Find a group with a similar audience and roughly similar size, swap posts. A well-written swap post into a 10,000-member group typically moves 80-200 people - call it 1%.

Two constraints nobody mentions. First, you lose members in the other direction; net gain on a balanced swap is small, and the value is really in reaching audiences you cannot buy. Second, your own audience tolerates maybe one promo post a month before engagement drops, so you have roughly twelve of these per year, total, across all partners.

Math: four swaps a quarter with 10,000-member partners at 1% = 400 members per quarter, $0 cash, maybe six hours of outreach. Excellent rate, hard ceiling.

Referral loops: a multiplier, not an engine

"Invite three friends, get X" works when X is worth something and the group already has people to do the inviting. On a group of 500, a referral programme produces nothing, because 3% participation of 500 is fifteen people.

Price it as reward ÷ completion rate. A $2 reward completing 55% of the time is $3.64 per member, before fraud. Budget 10-20% fraud from people inviting their own second accounts, and require the referred member to stay 7 days before the reward pays.

Reddit: cheap, slow, and rule-bound

Most large subreddits either ban t.me links outright or remove them as self-promotion, and the ones that allow them have a ratio rule you are expected to have earned. The channel works, but it works for people who were already participating.

Math: a well-received post in a 200k-member subreddit might reach 15,000 people, of whom 2% click the link in your comment and 40% join = 120 members, $0 cash, and the two months of participation that earned you the standing to post it. Real cost is time, and the time is not fungible - you cannot buy it.

Short-form video: high variance, low control

TikTok, Reels and Shorts all suppress off-platform links in captions, so the route is bio-link → landing page → Telegram. Three steps, each losing most of the traffic.

Math on a video that does 100,000 views: 0.3% reach the bio (300), 60% of those tap the link (180), 50% join (90). Ninety members from a video that outperformed. The variance is the story - nine videos do nothing and the tenth does 400 members. Viable as a compounding asset, useless as a way to hit a number by a date.

Paid member delivery: the volume floor

At $60 per 1,000 the unit cost is six cents a member, and the volume tiers take it to $52 per 1,000 - 5.2 cents - at 50,000. Against the paid channels above that is roughly 12× cheaper at the flattering end of the comparison and 100× at the honest one.

What you are buying is different, and it is worth being blunt about it. A delivered member did not choose you. Engagement rate on delivered members is a fraction of what an ad-clicker delivers, and if you measure success purely in messages per member per day, this channel will look bad.

What it is genuinely good at is base. Social proof is a real conversion factor on Telegram: a group at 12,000 converts an ad clicker much better than the same group at 400, because the clicker checks the member count before joining. Which means the cheap channel makes the expensive channels cheaper.

Sourcing decides quality. Delivery from public groups you name - up to ten of them - puts people in your group who already sit in groups about your topic; that is the difference between a base and a number. TeleReach runs orders that way, or from our US online-shopper audience when the customer is selling deal content and would rather not pick sources. $60 per 1,000, minimum 1,000, stepping to $52 at 50,000, paced across a schedule rather than delivered in one night.

Worked example: allocating $3,000

A US deals group at 900 members, needs to be a credible destination for affiliate traffic by Q4. Affiliate economics are tight - an Amazon Associates cookie lasts 24 hours from the click, so revenue depends on volume of clicks, not on nurturing individuals over months. That argues for base size over per-member intent.

Allocation:

• $1,000 → paid delivery, 17,800 members at the $56 tier ($996.80), paced across seven weeks. Group reaches ~18,700.
• $1,400 → Telegram Ads, run after the base is in place, when the member count no longer undermines the click. At €0.83 per member, call it $0.90 once converted, ~1,550 high-intent members.
• $400 → Meta retargeting to people who visited the deals site, $3.43 per member, ~115 members.
• $200 → referral rewards for the existing 900, who are the engaged core, ~55 members.
• $0 → four cross-promo swaps, ~400 members.

Total: roughly 19,900 added for $3,000, or $0.15 per member blended, with about 2,100 of them high-intent.

Now compare against spending the whole $3,000 on Meta alone: 875 members at $3.43. Same money, 5% of the members, better intent per head. For an affiliate model that monetises on click volume inside a 24-hour window, the blended allocation wins on revenue and it is not close. For a $200/month paid community, the pure-Meta allocation might well win instead. Match the channel to how the group makes money.

What usually goes wrong

Running ads into an empty group. The member count is visible before anyone joins. Paying $3.43 a click to send people to a 400-member group wastes most of the spend on a first impression that argues against joining.

Comparing channels on cost per click. Clicks are not the product. Half of Meta's clickers never complete the app switch; that loss belongs in the cost per member, not in a footnote.

Treating cross-promo as scalable. It is the best rate in the table and it caps out at a few hundred members a quarter. Plan around the cap.

Forgetting that groups need moderation at scale. Past 5,000 members you need an anti-spam setup and someone watching it. Telegram's Aggressive Anti-Spam is available in groups over 100 members and helps, but it also removes accounts - turn it on before a delivery, never during.

Building the whole plan on short-form. The variance means you cannot forecast it. Use it as upside, never as the line item that has to hit.

Buying the base and then not posting. All seven channels above are worthless against a group with no content cadence. Growth buys attention once; the posting schedule is what keeps it.

Next step

Write down what a member is worth to you - affiliate clicks per member per month, or subscription conversion rate, or lead value. Every number in this article is meaningless until you have that one, and most budget mistakes come from allocating without it. Then split the budget so the cheap channel builds the base first and the expensive channels run against a group that already looks worth joining. Start the base with a paced order from source groups you name.