How to Validate Product-Market Fit and Set Growth Goals

In part 1 of this series, we covered the importance of getting the fundamentals right while preparing to transition from initial traction to a growth engine. 

In part 2, we’ll dive into: 

1. Validate foundations and readiness
2. Set business goals

1. Validate foundations and readiness

To start with, ensure your twin foundations of Core Value Proposition and Ideal Customer Profile (ICP) are solid and aligned. This is time and effort well spent - any growth motion you prioritize will draw on these pillars to succeed and scale.

A) Core Value Proposition

• Do you have a clear and compelling articulation of the product / service you provide? 
• What pain does it alleviate? What need does it satisfy?

Do not use product features  or specifications, frame this in terms of the benefit to customers. If this is not clear, you may have a solution in need of a problem. Perhaps you’re too early for the market or you’re talking to the wrong segment.

• Why is your offering differentiated or better vs. what the customer does today?

B) Audience: Ideal Customer Profile (ICP) and Serviceable Obtainable Market (SOM)

• Ideal Customer profile (ICP): This is the persona who experiences the most value from your product or service. <br>Note: If you have an existing base of users, this is likely the cohort that is the most loyal or engaged, with highest retention vs other segments. To drive focus, it’s also a good exercise to specify who is not your target audience. <br>If you’re early on in the journey, you should start out with an initial hypothesis of who would value your offering and conduct qualitative interviews to validate your assumptions before proceeding further.<br>This is the information you should aim to capture: ‍
  • Profile: Demographics and Firmographics ‍
  • Motivation & Behavior: 
    • How is the ‘need’ or ‘pain point’ experienced? In an individual or group setting? In conjunction with another product? What is the frequency? 
    • Go deeper on the ‘why’ - what is the value you are bringing to this audience? 
    • What are the alternative solutions to using your product?

If you’re in a relatively new category, this needs to be a broad definition of other ways your audience solves their problem today vs. a strict competitive set.‍

• How does the user make a decision? What are their ‘watering holes’ - sources of information & influences?
• Serviceable Obtainable Market (SOM): While Total Available Market (TAM) is a useful signal of market potential for investors seeking to determine exit sizing & viability, it’s better for operators to focus instead on Serviceable Obtainable Market (SOM). <br>SOM is a more accurate representation of reality on the ground, it takes practical tradeoffs into account and is a better baseline for setting goals. 

Before you go down a long and expensive journey of committing engineering resources, talk to your users. I'm a big believer in user interviews if they're done properly, with a structure, and the insights feed your product roadmap. Aim for 10-15 high-fit users who match your proposed ICP. Either you'll confirm the ICP and rework parts of the product or pricing, or you'll realize you need to find another segment.

ICP is typically a segment, healthcare SMBs, say, or enterprise banking. Firmographics don't really change that often, so you might layer on technographics as well [maybe you want companies using HubSpot because you have something better], and then intent or behavioral signals that show they're ready for your category, like another startup raising a Series B, or someone hiring or expanding. The persona is the individual within the ICP: the technical champion, or the economic buyer who holds the budget. In B2B there's often a whole buying committee, with procurement on larger deals and sometimes the CEO, but if you have to understand one person first, make it the economic buyer.

An anti-ICP is very helpful if you don't want to be distracted, because the wrong ICP can hijack your product roadmap and deliver negative unit economics, where the cost of selling to and serving a customer is higher than what you get back. When I was at Expedia, I was responsible for growing our volume of long-tail hotels, and initially the focus was purely volume. About two years in, we ran a market prioritization exercise that looked at what it cost to sign a hotel, what it cost to serve it, and when Expedia started earning commission from its bookings. Over a three-year NPV, some hotels were negative: we had spent more acquiring them than they would ever generate. It's similar for a startup. Depending on your average deal size and selling motion, look at what you're spending on BDRs, AEs and customer success against the size of the deal. As an early startup, you need repeatable, sustainable growth with one segment first; you can add other ICPs later.

C) Reconfirm Product Market Fit (PMF)

Note that PMF is an iterative process, not a ‘one and done’ exercise, as customer expectations, their experience with your product and the competitive landscape continue to evolve. 

Look at data / signals across the following areas on an ongoing basis: 

1. [Sentiment & Feedback]: How would your customers feel if they could no longer use your product? How many of them would recommend your product to others?
2. [Behavior]:

• High customer retention: If customers are continuing to use your product over time [frequency dependent on category behavior], this is the strongest sign that you are adding value or solving a problem for them. 
• High organic growth: If new customers are coming to you organically [without paid marketing efforts], this is a sign that you are being recognized in the market and referred by your existing customers.

For B2B, the gold standard is always retention, because it means you've created value and the customer has paid for it and renewed. The problem is the long sales cycle: you have a customer now, but you don't know yet if they'll retain. Until you do, I'd look at a combination of signals:

• Qualitative feedback from users [the Sean Ellis test is well publicized].
• Usage depth, recency and frequency, depending on your category.
• Whether deals are moving quicker to closure, you're able to deal with the objections that come up, and your pipeline-to-contract or POC-to-contract conversion is improving.
• Organic pull. Are you getting recommended, is there word of mouth? If an inbound lead comes in, ask how they got to know about you.
• How many customers are upset when your service goes down. That's truly a measure of how integral you are to their workflows, and a sign you'd be missed.

If you're D2C, it's easier to gauge, because over time you can tell if people are coming back: what's the repeat purchase rate, what's the average order value? For a marketplace, I'd look at transaction volume growth over time; if it isn't growing, demand and supply don't see value in each other. Searches that go nowhere are a warning sign, often because demand is looking for something at a price point your supply doesn't offer.

If you'd like to test and document your understanding of the market, audience & your offering, review this interactive Growth Foundations worksheet.

2. Set Business Goals

These are the key questions to ask: 

1. What is the target revenue growth YoY? 
2. Break down revenue goals: from input to output
3. What budget or resources do you currently have to deliver these goals?  

[Bonus] Understand the unit economics of your business

A) Target Growth Rate

A healthy growth rate is the best indicator that your initial idea or concept can be a workable business. 

This is particularly important for institutional funding.

The bar for a Series A is well above the market average. Point Nine's Christoph Janz puts it at 2-3x year-over-year growth for B2B SaaS companies at $1-2M ARR [SaaStr, March 2025]. For context, High Alpha's 2025 SaaS benchmarks show AI-native companies at $1-5M ARR growing about 110% a year, against 40% for others.

B) Break down goals: understand the levers (inputs) that get to your results (outputs). 

Here’s a simple example to get your started: Deliver $1M in Annual Recurring Revenue (ARR). 

If your business is more nuanced or complex eg. if it’s a 2 sided marketplace or monetized via ads instead of paying users, adjust the calculations accordingly.

C) Resources: Budget availability 

• What budget do we need to deliver our goals? 
• Take into account current burn rate and timing of next / planned funding round to determine if a bridge round or additional financing is needed.<br>[Bonus] Unit economics: CAC, LTV and Payback 
• Customer Acquisition Cost (CAC),  LTV / CAC and Payback:  If you’re relatively early in the journey and have been focusing primarily on finding Product-Market Fit with a small group of users, your marketing and sales costs to acquire new customers are likely to be on the lower side.<br>However, as you prepare plans for growth, it is good to know your unit economics to understand how much a new customer is worth to you and given this - quantify how much you are able to spend on acquisition.<br>While businesses can become more efficient over a period of time, if the fundamentals don’t make sense to begin with, it is far better to adjust the business model and monetization strategy before aggressively investing in growth.

A few definitions and benchmarks: 

1. Customer Acquisition Cost (CAC): All sales, marketing & onboarding costs incurred in acquisition / No. of newly acquired customers 

Note: this is a fully loaded cost, and should include the costs of the following: 

1. Salaries of employees that are involved in acquiring customers
2. Tools deployed in the acquisition process
3. Spend eg. Paid media, content development, agency costs & commissions etc. 

Note: Any costs incurred to grow or retain existing customers should not be included in CAC.

2. LTV / CAC = Customer Lifetime Value / Customer Acquisition cost

While the ratio to aim for is 3:1, this depends on the business model at play.

As an example, a good LTV/CAC for D2C / marketplaces is 2-3X while Enterprise SAAS can operate at 4-6X given the subscription nature of the business. 

It is important to note that LTV projections can be notoriously difficult to estimate in early stages because there may not be many repeat buyers or retained customers as yet and churn data may not be reliable or stable. In this case, be wary of overinflating LTV projections - this can lead to justifying a higher CAC without merit. 

3. CAC Payback: Customer Acquisition Cost (CAC) payback is the number of months it will take to recover the cost of acquiring a customer. 

Note: Because of the LTV data quality and assumption risks mentioned above, CAC Payback is used more actively than LTV/CAC by early stage startups. 

CAC Payback = Acquisition Costs / Monthly revenue * Margin

CAC Payback Targets to aim for:

D2C: 

• For products that are likely to have low frequency or repeat behavior,  aim to recover CAC in the first transaction itself
• For repeat products on a subscription plan (e.g. household essentials), aim to recover CAC within 6 months 

B2B SAAS: 

• < 12 months if you’re selling to SMBs
• < 18 months if you’re selling to mid market
• < 24 months for enterprise

Frequently asked questions

How do you know if you have product-market fit?

Retention is the gold standard in B2B, because it means customers saw value, paid for it and renewed. Before you have retention data, use a combination of usage, qualitative feedback, deal progression and organic pull [referrals, word of mouth].

What's the difference between an ICP and a buyer persona?

ICP is a segment or group of companies [e.g. healthcare SMBs]; a persona is the individual within it, such as the user, the technical champion or the economic buyer who holds the budget.

What's the difference between TAM and SOM?

TAM tells investors how big the exit could be. As an operator, I'd focus on SOM instead, because it reflects what you can actually capture on the ground once practical tradeoffs are factored in, and that makes it a better baseline for your goals.

What is a good LTV:CAC ratio?

Aim for 3:1, though it depends on your business model. For D2C and marketplaces 2-3x is good, and enterprise SaaS can run at 4-6x because of the subscription. Be wary of overinflating LTV early on, when you don't have much repeat or churn data; it can justify a higher CAC without merit.

What is a good CAC payback period?

For B2B SaaS, under 12 months if you sell to SMBs, under 18 months for mid-market and under 24 months for enterprise. For D2C, aim to recover CAC on the first transaction for low-frequency products, or within six months on a subscription.