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MediaFast

Free Tool

Customer Acquisition Cost Calculator

Enter your marketing spend by channel, see your true CAC, benchmark it against SaaS industry averages, and discover how to bring it down.

Monthly Marketing Spend

Google Ads, Facebook Ads, LinkedIn Ads, etc.
$
Hours spent on blog posts, SEO, guides
hrs
Cost per hour for content work
$
Hours spent on social channels (uses same hourly rate)
hrs
CRM, email marketing, analytics tools, etc.
$

Customer Data

Total new paying customers this month
Total revenue from a customer over their lifetime
$
Average monthly subscription or spend per customer
$
Total CAC
$170

Average for SaaS

LTV:CAC Ratio
11.76x

Healthy

Total Monthly Spend
$8,500

Across all channels

Payback Period
1.7 mo

Healthy (under 12 months)

Spend by Channel

Paid Ads$5,000 (58.8%)
Content/SEO$2,000 (23.5%)
Social Media$1,000 (11.8%)
Tools/Software$500 (5.9%)

CAC by Channel (per customer)

Paid Ads$100
Content/SEO$40
Social Media$20
Tools/Software$10

Your CAC is around the industry average.

Consider shifting budget toward lower-cost channels like content marketing and Reddit.

Next step with MediaFast

Use this CAC baseline to test organic demand

MediaFast helps you test relevant Reddit communities and compare an organic channel against this acquisition baseline.

Subreddit PickerHand-picked from 4,200+ subsPost GeneratorRule-aware drafts in one clickBan-Safe PlaybookKeeps your account alive
No signup. The demo runs the real product.

Your CAC vs Industry Benchmarks

See how your $170 CAC compares to typical SaaS benchmarks. Blended SMB SaaS CAC commonly runs from about $274 to $1,450 depending on industry, per First Page Sage's SaaS CAC benchmark data.

B2C SaaS$64 to $519
SMB SaaS$274 to $1,450
Mid-Market SaaS$1,406 to $5,287
Enterprise SaaS$2,190 to $14,772
Your CAC: $170

What MediaFast does

Paid channels cost per click. Reddit costs your time

The free calculator shows what you pay per customer today. MediaFast finds the subreddits your buyers already use and drafts the rule-aware posts that bring customers in without ad spend.

STEP 1Find the right subredditsSubreddit Picker hand-picks communities from 4,200+ subs where your buyers ask for products like yours.
STEP 2Write posts that stay upPost Generator drafts rule-aware posts, and Comment Finder surfaces the best threads to reply under.
STEP 3Keep the account safeBan-Safe Playbook and a Daily Action Plan tell you what to post, where and when, without tripping filters.
Most founders start here
MediaFast, do it yourselfThe software that plans and drafts your Reddit marketing.
$39a month, or $179 once for lifetime
  • Subreddit Picker from 4,200+ subs
  • Rule-aware Post Generator
  • Ban-Safe Playbook + Daily Action Plan
  • Unlimited projects
Refund if we can't help you market on Reddit
Done for you
Reddit Marketing, Done For YouWe run your Reddit marketing, you build the product.
$499a month
  • We post and comment for you to drive traffic
  • Premium ghostwriting included
  • We manage 1 Reddit account
Monthly, starts with a quick DM
Pro
Reddit Growth, Done For YouReddit as your #1 traffic channel, at scale.
$1,999a month
  • 4-5 warmed-up Reddit accounts working at once
  • We seed your product in the threads buyers read
  • Weekly and monthly traffic reports
  • 200k+ impressions or you don't pay
Monthly, starts with a quick DM

Not sure which one fits? Compare every plan side by side further down this page.

Reddit Marketing CAC: ~$0

The lowest acquisition cost of any channel

Unlike paid ads where you pay for every click, Reddit marketing is entirely organic. You invest time, not money, into genuine conversations with potential customers. The result? A customer acquisition cost that is effectively zero in terms of direct spend.

When you post helpful answers in subreddits where your target audience hangs out, you build trust naturally. People click through to your product because they already see you as an expert, not because an algorithm served them an ad. This means higher conversion rates, lower churn, and significantly better unit economics.

Tools like MediaFast can help you identify the right subreddits, generate authentic posts, and track your Reddit marketing performance, all while keeping your CAC near zero.

Zero ad spendHigher trust signalsBetter conversion ratesCompounding returns

5 Ways to Lower Your CAC

Practical strategies used by the fastest-growing SaaS companies to reduce customer acquisition costs.

Leverage Reddit Marketing

Reddit is one of the few channels with near-zero customer acquisition cost. By providing genuine value in relevant subreddits, you build trust and attract customers organically. No ad spend required.

Invest in Content Marketing

High quality blog posts, guides, and tools compound over time. The CAC of content marketing drops dramatically after the initial investment because the content keeps generating leads for months and years.

Build a Referral Program

Your happiest customers are your cheapest acquisition channel. A well-designed referral program brings in customers at a fraction of paid-channel cost because the trust is already built in through personal recommendations.

Optimize Conversion Rates

Doubling your conversion rate effectively halves your CAC without spending a single extra dollar on marketing. Focus on landing pages, onboarding flows, and reducing friction in the signup process.

Cut Underperforming Channels

Regularly audit your channel-level CAC. If paid ads cost you $400 per customer but Reddit brings them in at near zero, reallocate that budget. Focus spend where it produces the best return.

Understanding your CAC is just the first step. The real win comes from systematically lowering it by finding channels that convert at minimal cost. Many SaaS founders are discovering that MediaFast helps them turn Reddit into their most efficient acquisition channel with practically zero spend.

SaaS CAC Benchmarks by Customer Type (2026)

These are blended figures (organic plus paid) from First Page Sage's CAC-by-industry benchmark report, which tracks 27 SaaS verticals. The spread inside each segment is wide, so treat your segment's range as a sanity check, not a target. For a per-channel breakdown, we keep a separate page on the average cost per customer by marketing channel.

Customer segmentTypical blended CACWhy the range
Consumer (B2C)$64 to $519Short sales cycles, low-touch signup, heavy reliance on organic and viral loops
SMB$274 to $1,450Self-serve plus light sales assist; content and community channels matter most here
Mid-market$1,406 to $5,287Longer evaluations, multiple stakeholders, demos and trials with sales involvement
Enterprise$2,190 to $14,772Months-long cycles, security reviews, dedicated sales teams baked into the cost

Is Your CAC Healthy? A Simple Decision Tree

1. LTV:CAC below 1:1

You lose money on every customer. Pause paid spend, fix pricing or churn first. Nothing else on this list matters until this does.

2. LTV:CAC between 1:1 and 3:1

Viable but thin. Shift budget toward your cheapest channels and improve conversion before scaling spend. The 3:1 floor is the long-standing industry rule of thumb, and current benchmark medians sit right around it (about 3.2:1 for B2B SaaS overall). See our page on what a good LTV to CAC ratio is.

3. LTV:CAC at 3:1 or better, payback over 12 months

Profitable on paper but slow on cash. Median SaaS payback runs about 15 to 16 months; under 12 is strong and 6 or less is elite. Consider annual prepay discounts to pull cash forward.

4. LTV:CAC at 3:1 or better, payback under 12 months

Healthy engine. If you are far above 5:1, you may be under-investing in growth: spend more until the ratio compresses toward 3:1. Benchmark your absolute number on our what is a good CAC for a SaaS page.

Reddit marketing has the lowest CAC of any channel

MediaFast helps you do it systematically. Find subreddits, generate authentic posts, and acquire customers at near-zero cost.

A buyer asks Reddit for the best tool in your niche and your product is not in the thread. MediaFast finds your subreddits, drafts rule-safe posts and comments, and minimizes ban risk. The next time buyers ask, the top comment recommends your product and a signup lands.
mediafa.st / autopilot
MediaFast autopilot
Your product, marketed on Reddit
Working now
reddit.com/r/SaaS
r/SaaS • u/buyer • 2h
Find. Draft. Post. No bans.
Put it on autopilot

Frequently Asked Questions About CAC

Everything you need to know about calculating and optimizing customer acquisition cost.

Customer Acquisition Cost is the total amount of money your business spends to acquire a single new customer. It includes all marketing spend, sales team costs, tools, and any other expense directly tied to winning a new customer. CAC is one of the most important metrics for any SaaS or subscription business because it directly impacts profitability.

The gold standard for SaaS companies is an LTV:CAC ratio of 3:1 or higher. This means the lifetime value of a customer should be at least three times what it costs to acquire them. A ratio below 1:1 means you are losing money on every customer. Between 1:1 and 3:1, your business is viable but has room for optimization. Above 5:1 may indicate you are under-investing in growth.

There are several proven strategies: focus on organic channels like Reddit marketing and SEO that have near-zero marginal costs, improve your conversion rates through better landing pages and messaging, implement referral programs, double down on the channels with the lowest CAC, and invest in content marketing that compounds over time. Tools like MediaFast help you leverage Reddit as a near-zero CAC acquisition channel.

Blended CAC for SaaS companies varies widely by industry and customer segment. According to First Page Sage's benchmark data across 27 SaaS industries, SMB-focused products commonly land between $274 and $1,450, while enterprise SaaS can range from about $2,190 up to $14,772 or more. B2C SaaS typically has the lowest CAC, roughly $64 to $519, thanks to shorter sales cycles. Your ideal CAC depends on your average contract value and customer lifetime value.

CAC payback period is the number of months it takes to recover the cost of acquiring a customer. It is calculated by dividing your CAC by the average monthly revenue per customer. A payback period under 12 months is considered healthy for most SaaS companies. Shorter payback periods mean faster reinvestment into growth and less cash flow pressure on the business.

Reddit Analytics & Calculators