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The Marketing Stack Audit: How to Calculate ROI & ROMI on Every Tool You Pay For .Most businesses have a software problem they don’t know they have.

They are paying for 8, 10, sometimes 15 tools every month. Some of those tools are generating significant revenue. Some are sitting largely unused. Some are duplicating functions that another tool in the stack already covers. And almost none of the businesses paying for these tools have done the calculation that would tell them which category each tool falls into.

The result: the average SaaS company uses 91+ tools in 2026, with at least 50% of SaaS licences underutilised or unused. Money that should be compounding into revenue is funding software subscriptions that are delivering no measurable return.

This article is the framework for fixing that — specifically applied to the growth intelligence stack we use in every client audit: SEMrush, HubSpot, ClickFunnels, Leadpages, Apollo, Google Analytics, Google Tag Manager, Google Search Console, Hotjar, QuickBooks, and Kit (ConvertKit). Each tool has a job. Each tool has a cost. And each tool should be generating a return that justifies that cost — or it should be cut.

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The Two Metrics That Matter: ROI vs ROMI

Before calculating anything, the definitions matter — because ROI and ROMI are measuring different things, and confusing them produces misleading conclusions.

ROI (Return on Investment) measures the total return on any investment relative to its cost:

ROI = (Revenue Generated − Total Investment) ÷ Total Investment × 100

If your total revenue is $200,000 and marketing spending is $50,000, then: $200,000 − $50,000 = $150,000 net profit. ROI = $150,000 ÷ $50,000 × 100 = 300%. For each dollar you spend on marketing, you earn $3 in profit.

ROMI (Return on Marketing Investment) focuses specifically on marketing activities — isolating the return from marketing spend versus overall business investment:

ROMI = (Revenue Attributable to Marketing − Marketing Investment) ÷ Marketing Investment × 100

ROMI focuses specifically on marketing activities and provides a more granular view of marketing effectiveness. If your company spent $50,000 on a campaign that generated $200,000 in revenue, ROMI = [($200,000 − $50,000) / $50,000] × 100% = 300%.

For software stack analysis, you need both:

• ROI tells you whether each tool is worth its subscription cost relative to the revenue it contributes
• ROMI tells you whether your overall marketing investment — including all the tools you use to run marketing — is generating a profitable return

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The Full Software Cost Audit: What You Are Actually Spending

Before calculating returns, you need an honest inventory of costs. Most businesses underestimate their software spend because they look at individual tools in isolation rather than the cumulative stack.

Here is the Growth Intelligence Stack we use in client audits — with approximate monthly costs at standard tiers:

Tool	Function	Est. Monthly Cost
SEMrush	SEO, keyword intelligence, competitive analysis	$140–$500
HubSpot	CRM, email marketing, sales pipeline	$50–$800
ClickFunnels	Funnel building, landing pages	$97–$297
Leadpages	Landing pages, lead capture	$37–$99
Apollo	Lead generation, prospecting, outreach	$49–$99
Kit (ConvertKit)	Email marketing, sequences, automation	$29–$99
Hotjar	Website heatmaps, session recordings	$32–$80
Google Analytics	Website traffic analysis	Free
Google Tag Manager	Tag and tracking management	Free
Google Search Console	Search performance monitoring	Free
QuickBooks	Accounting, invoicing, financial tracking	$30–$90
AWS / GoDaddy / Shopify / WordPress	Hosting, e-commerce infrastructure	$20–$300
Total (mid-tier estimate)		~$561–$2,463/mo

At a mid-tier stack running $1,200/month, your software costs $14,400 per year before a single dollar of ad spend, freelancer cost, or your own time.

That $14,400 is an investment. It needs to produce a return that justifies it — ideally a ROMI of at least 300%, which means $43,200+ in attributable revenue from that investment.

The question every business should be asking: is it?

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How to Calculate ROI Per Tool

The framework for calculating ROI on each tool in your stack has three steps:

Step 1 — Assign Each Tool a Revenue Function

Every tool in a growth stack should have a specific, measurable role in generating or protecting revenue. If you cannot articulate what revenue function a tool serves, that is a problem.

SEMrush → Organic traffic growth → leads from organic search → revenue HubSpot → Lead capture, nurturing, CRM → conversion of leads to clients → revenue ClickFunnels/Leadpages → Paid traffic conversion → leads from paid ads → revenue Apollo → Outbound prospecting → booked calls → revenue Kit/ConvertKit → Email sequences → lead nurture → revenue Hotjar → Conversion rate optimisation → improved checkout/funnel performance → revenue QuickBooks → Financial management → invoicing accuracy, tax compliance → cost avoidance Google tools → Traffic measurement, search visibility → optimisation decisions → revenue

Step 2 — Measure the Revenue Each Tool Contributes

This requires attribution — connecting the revenue you generate to the tools that contributed to generating it. There are several approaches: multi-touch attribution assigns value to each marketing touchpoint in the customer journey.

In practice, for most small and medium businesses, a simplified attribution model works:

For SEMrush: Track organic traffic in Google Analytics. Calculate what percentage of your leads come from organic search. Apply that percentage to your revenue to get organic revenue. Compare to SEMrush’s monthly cost.

For HubSpot: Track leads captured through HubSpot forms and sequences. Track which leads converted to paying clients. Calculate revenue from HubSpot-sourced clients. Compare to HubSpot’s monthly cost.

For ClickFunnels/Leadpages: Track leads generated per landing page using UTM parameters and Google Analytics. Calculate conversion rate and revenue from those leads. Compare to platform cost.

For Apollo: Track outbound sequences sent, replies received, calls booked, and clients closed. Calculate revenue from Apollo-sourced clients. Compare to Apollo’s monthly cost.

For Kit/ConvertKit: Track email open rates, click rates, and — most importantly — revenue from email-triggered purchases or bookings. Compare to platform cost.

For Hotjar: Calculate improvement in conversion rate since implementation. Apply conversion rate uplift to your traffic volume and average transaction value to estimate revenue impact. Compare to Hotjar’s monthly cost.

Step 3 — Apply the ROI Formula Per Tool

Tool ROI = (Revenue Attributed to Tool − Tool Monthly Cost) ÷ Tool Monthly Cost × 100

Example — SEMrush at $140/month:

• Monthly organic traffic: 2,000 visits
• Organic lead rate: 3% = 60 leads
• Close rate: 20% = 12 clients
• Average client value: $350 (hourly) or $5,000 (audit)
• Revenue: 12 × $350 = $4,200 (conservative hourly estimate)
• SEMrush ROI: ($4,200 − $140) ÷ $140 × 100 = 2,900%

Example — Apollo at $49/month:

• Outbound sequences sent: 500/month
• Reply rate: 8% = 40 replies
• Meeting booked rate: 25% = 10 meetings
• Close rate: 20% = 2 clients
• Revenue: 2 × $5,000 = $10,000
• Apollo ROI: ($10,000 − $49) ÷ $49 × 100 = 20,308%

These numbers illustrate why high-performing tools deserve more investment — their ROI at current spend is so strong that scaling the underlying activity (more content for SEMrush, more sequences for Apollo) should be the priority before adding new tools to the stack.

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Calculating Your Full Stack ROMI

Once you have individual tool ROI calculations, aggregate them into a full stack ROMI:

Stack ROMI = (Total Revenue Attributed to Marketing Stack − Total Stack Cost) ÷ Total Stack Cost × 100

Example — Growth Intelligence Stack:

Tool	Monthly Cost	Attributed Revenue
SEMrush	$140	$4,200
HubSpot	$200	$8,000
ClickFunnels	$97	$3,500
Apollo	$49	$10,000
Kit	$49	$2,000
Hotjar	$32	$800
Leadpages	$37	$1,500
QuickBooks	$30	$500 (cost avoidance)
Google tools	$0	Infrastructure
Total	$634	$30,500

Stack ROMI = ($30,500 − $634) ÷ $634 × 100 = 4,709%

This means every $1 invested in the software stack generates $47 in revenue. That is the kind of return that justifies maintaining and scaling the stack — not cutting it.

 

 

 

 

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The 6 Audit Questions Every Business Should Ask

The ROI calculation is only useful if it drives decisions. These are the six questions the calculation should answer:

1. Which tools have the highest ROI — and are we scaling them?

The tools generating your highest returns deserve more investment — more content created for SEO tools, more sequences run through outbound tools, more A/B tests run through conversion tools. Before adding new tools, maximise the return from what is already working.

2. Which tools have negative or unclear ROI — and why are we keeping them?

If a tool doesn’t move revenue, don’t keep it. Run 30-day pilots with clear success criteria. A tool that has been in your stack for six months without a clear revenue contribution is a liability, not an asset.

3. Are we duplicating functions across tools?

ClickFunnels and Leadpages both build landing pages. HubSpot and Kit both send email sequences. Apollo and HubSpot both manage contact lists. Duplication in a software stack is expensive — you are paying twice for the same function and dividing your data across two systems, which makes attribution harder and reporting less reliable.

4. Is our attribution actually working?

Total campaign costs should include ad spend, agency fees, creative work, landing page development, and attribution tools. If you cannot trace a specific lead from its first touchpoint to a closed deal, your attribution is broken — and without attribution, your ROI calculations are guesswork.

Google Tag Manager is the tool that makes attribution work across your stack. Every conversion event — form submission, booking, purchase, email sign-up — should be tracked as a Tag Manager event, flowing into Google Analytics, and visible in your HubSpot CRM. If these three systems are not talking to each other, you have an attribution gap that is preventing accurate ROI measurement.

5. Are we tracking the right metrics — or just vanity metrics?

Prove ROI with SQL rate, pipeline $, win rate, CAC payback, LTV: CAC — not opens and clicks.

Email open rates are not a business outcome. Organic traffic is not a business outcome. Impressions are not a business outcome. The metrics that matter are:

• CAC (Customer Acquisition Cost): Total marketing stack cost ÷ number of new clients acquired
• LTV (Lifetime Value): Average client value × average client lifespan
• LTV:CAC ratio: Should be at least 3:1. The ideal LTV:CAC ratio falls between 3:1 and 5:1.
• CAC Payback Period: How many months of client revenue does it take to recover the cost of acquiring that client?
• Pipeline value: Total value of deals in your CRM at each stage

6. What is the three-year compounding ROI of our highest-performing tools?

Content marketing typically breaks even by the seventh month, hits 300% by the twelfth month, and can exceed 1,100% by the thirty-sixth month. On average, content marketing delivers a three-year ROI of 844%.

SEO is a compounding investment. Content published today generates traffic next year and the year after. The ROI of your SEMrush investment is not just this month’s organic leads — it is the accumulated organic traffic position that builds over 12, 24, 36 months of consistent investment.

Calculate your three-year ROI for SEO and content tools using this formula:

3-Year SEO ROI = (Monthly organic revenue × 36) − (Monthly SEMrush cost × 36) ÷ (Monthly SEMrush cost × 36) × 100

At $4,200/month organic revenue and $140/month SEMrush cost over 36 months: ($151,200 − $5,040) ÷ $5,040 × 100 = 2,900% three-year ROI

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The Stack Optimisation Decisions

Based on the ROI framework, here are the typical optimisation decisions that emerge from a Growth Intelligence Audit:

Cut: Tools with no attributable revenue after 90 days and no clear path to generating it. Duplicate function tools. Tools nobody in the team actually uses.

Scale: Tools with ROI above 1,000% deserve more investment in the activities they support — more content for SEMrush, more sequences for Apollo, more split tests for ClickFunnels.

Fix: Tools with potential but broken attribution. HubSpot that isn’t connected to Google Analytics. Tag Manager that isn’t firing conversion events. Apollo sequences that aren’t tracked in the CRM. These tools may have high potential ROI that is invisible because measurement is broken.

Consolidate: Where two tools serve the same function, choose the one with better integration with your core CRM (HubSpot) and cut the other.

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What This Looks Like in Practice — The Growth Intelligence Audit

Every Growth Intelligence Audit includes a full software stack review as part of its revenue systems analysis. We map every tool in your current stack, assess attribution connectivity, calculate per-tool ROI based on actual data from your Google Analytics, Search Console, and HubSpot accounts, and identify:

• Which tools are generating positive ROI and should be scaled
• Which tools have broken attribution that is masking potential returns
• Which tools are duplicating functions and should be consolidated or cut
• What the total ROMI of your current marketing investment is — and what it should be

The output is a Revenue Leak Report that shows exactly where your software spend is generating returns and where it is leaking, alongside a 90-day roadmap that tells you what to fix, what to cut, and what to scale.

According to McKinsey, companies that implement rigorous marketing analytics like ROMI see up to a 15–20% improvement in marketing ROI. For a business spending $1,200/month on software, a 15% improvement in how that software is used and measured represents $2,160 in additional annual return — from the same investment.

The software is not the problem. The measurement is. Fix the measurement and the decisions become obvious.

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Related reading:

• What Does a Growth Intelligence Audit Actually Include?
• HubSpot for Small Business: Is It Worth It in 2026?
• How to Build a Lead Nurturing Funnel That Converts