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    <title>ProdForma Blog</title>
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    <description>Unit economics, financial modeling, and product management for B2B SaaS.</description>
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    <lastBuildDate>Thu, 04 Jun 2026 21:06:56 GMT</lastBuildDate>
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      <title><![CDATA[Classifying Costs, Part 1: Direct vs Indirect, Fixed vs Variable]]></title>
      <link>https://prodforma.com/blog/cost-classification-framework</link>
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      <description><![CDATA[The three-dimensional cost classification framework every product leader needs — behavior, function, and traceability. Why the same cost can be fixed AND COGS, and why that matters for your financial model.]]></description>
      <pubDate>Thu, 26 Mar 2026 00:00:00 GMT</pubDate>
      <category>costs</category>
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      <category>cost-classification</category>
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      <title><![CDATA[Classifying Costs, Part 2: A Laundry List of Examples for SaaS Costs]]></title>
      <link>https://prodforma.com/blog/saas-cost-mapping-examples</link>
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      <description><![CDATA[Where specific costs land in the P&L for cloud-native, ML/data-intensive B2B SaaS businesses. A reference guide for cloud compute, storage, data acquisition, ML work, people, and third-party services.]]></description>
      <pubDate>Thu, 26 Mar 2026 00:00:00 GMT</pubDate>
      <category>costs</category>
      <category>saas</category>
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      <category>opex</category>
      <category>cloud</category>
      <category>ml</category>
      <category>cost-classification</category>
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      <title><![CDATA[SaaS Finance, Part 1: Stating the Obvious]]></title>
      <link>https://prodforma.com/blog/saas-finance-stating-the-obvious</link>
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      <description><![CDATA[The financial characteristics of SaaS businesses that experienced operators take for granted but first-time founders and PMs need to internalize — compounding, churn, the J-curve, and operating leverage.]]></description>
      <pubDate>Thu, 26 Mar 2026 00:00:00 GMT</pubDate>
      <category>saas</category>
      <category>finance</category>
      <category>revenue</category>
      <category>churn</category>
      <category>operating-leverage</category>
      <category>j-curve</category>
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      <title><![CDATA[SaaS Finance, Part 2: The P&L Waterfall, Line by Line]]></title>
      <link>https://prodforma.com/blog/pl-waterfall-line-by-line</link>
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      <description><![CDATA[A detailed walkthrough of each line in the SaaS P&L waterfall — Revenue through Net Income — with worked examples using fictional dev-tool products.]]></description>
      <pubDate>Thu, 26 Mar 2026 00:00:00 GMT</pubDate>
      <category>saas</category>
      <category>p-and-l</category>
      <category>revenue</category>
      <category>cogs</category>
      <category>gross-margin</category>
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      <title><![CDATA[SaaS Finance, Part 3: Acronyms and Profitability Metrics]]></title>
      <link>https://prodforma.com/blog/saas-acronyms-profitability-metrics</link>
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      <description><![CDATA[MRR, ARR, ACV, gross margin, contribution margin, EBIT, EBITDA, churn rate, and net revenue retention — what each means, how to compute it, and what good looks like.]]></description>
      <pubDate>Thu, 26 Mar 2026 00:00:00 GMT</pubDate>
      <category>saas</category>
      <category>metrics</category>
      <category>mrr</category>
      <category>arr</category>
      <category>gross-margin</category>
      <category>contribution-margin</category>
      <category>nrr</category>
      <category>churn</category>
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      <title><![CDATA[SaaS Finance, Part 4: Rules of Thumb]]></title>
      <link>https://prodforma.com/blog/saas-rules-of-thumb</link>
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      <description><![CDATA[The efficiency metrics and heuristics that investors use to evaluate SaaS businesses — Rule of 40, Magic Number, Burn Multiple, and the PE investor's checklist.]]></description>
      <pubDate>Thu, 26 Mar 2026 00:00:00 GMT</pubDate>
      <category>saas</category>
      <category>metrics</category>
      <category>rule-of-40</category>
      <category>magic-number</category>
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      <category>investors</category>
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      <title><![CDATA[Unit Economics for Product Leaders, Part 1: Unit Economics Arithmetic]]></title>
      <link>https://prodforma.com/blog/unit-economics-formulas</link>
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      <description><![CDATA[Core unit economics formulas for B2B SaaS — common errors in ARPU and LTV calculations, dimensional analysis, revenue-based vs. margin-based LTV, and the weighted LTV problem.]]></description>
      <pubDate>Tue, 24 Mar 2026 00:00:00 GMT</pubDate>
      <category>unit-economics</category>
      <category>saas</category>
      <category>product-management</category>
      <category>ltv</category>
      <category>arpu</category>
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      <title><![CDATA[Unit Economics for Product Leaders, Part 2: The Bridge to the P&L]]></title>
      <link>https://prodforma.com/blog/bridge-to-pl</link>
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      <description><![CDATA[How per-customer unit economics connect to portfolio-level P&L, the cost taxonomy that matters, why gross margin ≠ contribution margin, and the explicit bridge from unit economics to profitability.]]></description>
      <pubDate>Tue, 24 Mar 2026 00:00:00 GMT</pubDate>
      <category>unit-economics</category>
      <category>saas</category>
      <category>p-and-l</category>
      <category>contribution-margin</category>
      <category>cost-classification</category>
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      <title><![CDATA[Unit Economics for Product Leaders, Part 3: Five Decision Frameworks]]></title>
      <link>https://prodforma.com/blog/decision-frameworks</link>
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      <description><![CDATA[Product decision frameworks built on unit economics — the attribution trap, variable vs. fixed cost reduction, bundling economics, capacity-constrained optimization, and breakeven pricing floors.]]></description>
      <pubDate>Tue, 24 Mar 2026 00:00:00 GMT</pubDate>
      <category>unit-economics</category>
      <category>saas</category>
      <category>product-management</category>
      <category>decision-frameworks</category>
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