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Startup Financial Model: Building a Startup Financial Model

By Mathew Gollow on June 30, 2021
Last updated on April 23, 2026

You’ve got a brilliant startup idea. Great! But no idea works without a plan.

The good news is that a startup financial model is the plan. This article will explain the goals of a financial model and how to build one that works for your business. 

Key Takeaways: 

  • A startup financial model can help you predict, plan for, and optimize future business goals and revenue
  • There are multiple financial forecasting models available, which you can leverage for diverse use cases
  • Financial forecasting models can help SaaS brands and startups predict revenue growth while considering historical data, market trends, and diverse scenarios 
  • Building a financial model requires accurate data, and the right financial modeling software can streamline the modeling process

What Is a Startup Financial Model?

For instance:

  • How many customers do you think you’ll have?
  • How many people should you hire?
  • How will you improve your margins over time?

Creating a startup financial model helps you organize and keep track of the assumptions you’ll test as you implement your plans. Even the best financial models aren’t always correct — but the figures you project compared to your actual numbers help guide you through the startup phase and beyond.

A good, functioning model illustrates your potential. It also helps you make good decisions when you understand why your projections and results differ.

You need numbers to get the insight you need. For that, you need a financial plan with proper metrics. Start a free trial of Baremetrics to get started on the right foot. 

SaaS Financial Forecasting vs. Actuals 

Financial models often make use of revenue forecasting, but it’s important to use an operating model that shows actual financial performance data compared with forecasted performance. 

We believe this is particularly important for SaaS financial models, as it gives you more insight into how accurate your forecasts are and how to interpret them moving forward. 

There are different types of financial forecasting models, and knowing which to use for your business is essential. The best types of startup and SaaS revenue forecasting, for example, include the following:

Lead-driven forecasting

 Use the number of leads, conversion rates, and average sales prices to estimate revenue from different lead sources.

Lifetime value forecasting

Estimate the value of the average customer to predict future revenue based on current performance and future projections.

Opportunity forecasting

Assess prospect conversions based on their stage in the sale cycle, giving you a better idea of your current pipeline conversion potential.

Historical forecasting

The most common and easiest method for predicting revenue, it assesses historical sales data to predict future business growth and revenue. 

Scenario forecasting

Particularly important for startups and SaaS companies, this forecasting method allows you to assess forecasts based on different scenarios. What would happen to your business if you opened a new location, for example? And what if your supply chain was disrupted?

Allowing businesses to view the best and worst case scenarios for their revenue, this method is an important element of data-driven decision making. 

Financial forecasting software typically has multiple models available. Check out these financial forecasting model examples.

Startup Financial Model: Getting Started

Ready to build a financial model? Here’s the basics on how to get started: 

  1. Determine the right KPIs. These are figures — including any assumptions — you can track, such as growth rate. Including any KPIs you’re unable to track is useless. Consider the industry’s standard KPIs and start there.
  2. Use a startup financial template. Starting from scratch isn’t suggested, and building a model in Excel can be time-consuming. You can use ours!
  3. If you’re in operation, merge actuals with projections. Your real numbers help keep you grounded. When compared with actual numbers, anything unrealistic in your model can offer insight into where your projections might be off. Take a look at conversion rates, customer acquisition costs, and overall financial performance.
  4. Start with revenue and work from the top to the bottom of your income statement. Revenue models can help — but when you consider potential revenue, you must understand where it comes from. What’s driving it? For instance, do you have a certain number of sales agents or current customers or a specific marketing activity planned? You also need to factor in COGS when making financial projections. Review your balance sheet, cash flow statement, and other financial statements.
  5. Factor in how many employees you have or plan to have. This is often your greatest expense when first starting out. You need to consider your goals and how many employees you need to reach them. How much will it cost to hire those employees? And don’t forget the costs of recruiting. Even if your network is large, it’s likely you’ll need to hire down the road.
  6. Estimate additional expenses. Take a look at other SaaS businesses and review your business plan. How did they scale their expenses as they grew? It’s vital for your cash flow — especially if you’re an early-stage startup — to factor in additional expenses as time goes on. There aren’t many companies that have greater than a 50% profit margin before taxes, so expenses are crucial to your numbers. Financial modeling or cash flow forecasting software is great for this.
  7. Working capital is important to your business model. Knowing when your customers will pay and when you owe your suppliers and vendors is crucial. This affects your cash flow and subsequent budgeting.
  8. Review your projections. Take another look at your startup financial summary. Is it sensible? Does it tell the same story you pictured? Perform a sanity check.

Learn more about the metrics that are most important for your financial model. Start a free trial of Baremetrics today.

 

 

How Do I Leverage Financial Models? 

As we’ve already discussed, there are multiple types of financial forecasting models. There are also plenty of ways to use them. You can read our full post about financial modeling use cases to learn more, but here are a few examples: 

Use top-down forecasting models to evaluate new growth opportunities, which relies heavily on the size of a new market.

Use bottom-up forecasting that use historical revenue data to predict long-term growth, given you stay on the current course.

Use correlation-based forecasting to identify correlating variables and how they impact your business growth and revenue.

Bonus Tips to Consider 

  • Know and understand your user metrics. Model monthly for such things as how many new users you gained, lost, or upgraded.

  • Annual contracts matter. How long are your contracts? How often do you receive payment? What’s your monthly recurring revenue (MRR)? Offering annual-only memberships paid upfront defers revenue — which is good — but it can pose certain modeling challenges, such as keeping tabs on churn.

  • Different membership tiers need their own model. If you offer more than one type of subscription, create a financial model for each pricing tier. This will help you understand how each user plan influences your growth and your overall profitability.

How Baremetrics Can Help

You can’t get the figures you need for ongoing modeling without tracking metrics.

That’s where Baremetrics comes into play.

We comprehensively understand your business with metrics like churn rate, customer lifetime value, and more. Try a free, 14-day trial of Baremetrics and see for yourself.

FAQs

  • What is a startup financial model and why does a SaaS company need one?
    A startup financial model is a structured set of projections that maps out your expected revenue, costs, and cash flow so you can make informed business decisions.

    For a SaaS or subscription business, it goes beyond a basic spreadsheet. A good financial model tracks the assumptions driving your growth, things like trial-to-paid conversion rates, monthly recurring revenue, customer acquisition cost, and churn rate, then compares those projections against actual performance over time. That gap between forecast and actuals is where the real insight lives. It tells you whether your pricing, hiring pace, or acquisition channels are working the way you expected. Without a financial model, you are making growth decisions without a feedback loop.
  • What is the difference between bottom-up and top-down financial forecasting for SaaS startups?
    Bottom-up forecasting builds revenue projections from your actual subscription metrics, while top-down forecasting starts from total market size and works backward to estimate your share.

    For most SaaS founders, bottom-up is more useful day to day. It roots your financial model in real inputs: number of active subscribers, average revenue per account, expansion MRR from upgrades, and historical churn rate. Top-down models are better suited for evaluating a new market opportunity or preparing investor materials where you need to frame the addressable market. The strongest startup financial plans use both: top-down to set the ambition, bottom-up to validate whether your current unit economics can actually get you there.
  • How do I build a financial model for a SaaS startup without hiring a consultant?
    Start with a SaaS financial model template, populate it with your real subscription metrics, and iterate from there rather than building from scratch in a spreadsheet.

    The practical steps are:
    • Define the KPIs you can actually track, such as MRR, churn rate, LTV, and customer acquisition cost.
    • Start with revenue at the top of your income statement and work downward through cost of goods sold, headcount, and operating expenses.
    • Merge your actuals with projections so the model self-corrects as real data comes in.
    • Use a tool like Baremetrics to pull live subscription data directly from your payment processor, so your inputs stay accurate without manual exports.
    Reviewing your model monthly and comparing forecast to actuals is what turns a static template into a working decision-making tool.
  • How do I measure and reduce involuntary churn caused by failed payments in my subscription business?
    Involuntary churn from failed payments is one of the most fixable revenue leaks in a subscription business, and tracking it starts by separating it from voluntary cancellations in your churn reporting.

    Most SaaS analytics platforms lump all churned MRR together, which hides how much you are losing to card declines and expired billing details rather than genuine product dissatisfaction. Baremetrics breaks out involuntary churn and includes a feature called Recover that automatically retries failed charges, sends smart dunning emails, and prompts subscribers to update their payment details before the subscription lapses. For subscription businesses with $10K or more in MRR, recovering even a small percentage of failed payments compounds significantly over time and improves your net revenue retention without touching your product or pricing.
  • How can I benchmark my SaaS startup financial projections against industry data?
    Benchmarking your financial projections means comparing your key subscription metrics, such as churn rate, MRR growth, and LTV, against real data from SaaS companies at a similar stage and revenue range.

    Generic industry reports often use averages that span enterprise and early-stage companies, which makes them unreliable for a startup financial model. Baremetrics publishes open benchmark data drawn from hundreds of SaaS businesses, giving you a more relevant reference point for metrics like monthly churn rate, average revenue per user, and trial conversion rates. When your projections match or beat those benchmarks, you have a credible data point for investor conversations. When they fall short, you have a specific metric to focus your financial modeling and growth efforts on.

Mathew Gollow

Mathew spends his days bringing the brilliant ideas of the Baremetrics team to the blog. When Mathew’s not chasing after his team for more accurate and clear information, you can find him teaching voice at the local music academy.