In a nutshell: Measuring your marketing agency's ROI is not optional: it is the only way to know whether your investment is generating real value. In this article, we analyze the 10 fundamental metrics — from ROAS to MER — with formulas, Italian benchmarks updated to 2026, and a practical system for setting up reporting with your agency. You will also discover the warning signs that something is not working.
Why measuring your agency's ROI is essential (and why so few do it)
Every year, Italian companies invest billions of euros in marketing activities delegated to external agencies. Yet, according to a 2025 HubSpot survey, only 37% of Italian SMEs systematically measure the return on investment of their campaigns. An alarming figure, especially considering that the average spend on agency services ranges between 2,000 and 15,000 euros per month.
The problem is not a lack of data — quite the opposite, we live in the age of information overload. The problem is knowing which metrics to focus on, how to interpret them, and above all, how to use them to make informed decisions about your relationship with your agency.
Measuring your agency's ROI serves three fundamental purposes:
- Accountability: the agency knows that results are being monitored, which incentivizes better performance
- Budget optimization: knowing what works allows you to reallocate resources toward the highest-performing channels
- Strategic decisions: renewing the contract, switching agencies, or bringing things in-house — these are choices that require data, not gut feelings
Why do so few do it? Often there is no shared framework. The agency presents its monthly reports with the metrics it prefers to showcase, and the client lacks the tools to distinguish vanity metrics from truly meaningful KPIs. This article changes that.
The 10 metrics that truly matter
Not all metrics are created equal. Some tell you whether you are spending wisely, others whether you are earning, and still others whether you are building long-term value. Here are the 10 that every business owner and marketing manager should monitor.
1. ROAS (Return on Ad Spend)
ROAS is the king of paid advertising metrics. It measures how much revenue you generate for every euro invested in advertising. The formula is straightforward:
ROAS = Campaign Revenue / Advertising Spend
A ROAS of 4:1 means that for every euro spent on ads, four euros come back in revenue. But beware: ROAS does not account for agency fees, creative production costs, or profit margins. A ROAS of 4:1 with a 20% gross margin and an agency fee of 15% of ad spend could mean you are breaking even — or even losing money.
In Italy in 2026, ROAS benchmarks vary enormously by industry:
- Fashion e-commerce: average ROAS of 3.5:1 on Google Ads, 2.8:1 on Meta
- B2B services: average ROAS of 5:1 on Google Ads (search), 1.5:1 on LinkedIn Ads
- Food & beverage: average ROAS of 4.2:1 on Meta, 3.1:1 on Google Ads
- Real estate: average ROAS of 8:1 on Google Ads (given the high value per transaction)
The recommendation is to ask your agency for the net ROAS, i.e., adjusted for the management fee, and compare it with industry benchmarks. If the ROAS is consistently below the average, it is time to ask questions.
2. CPA and CPL (Cost per Acquisition and Cost per Lead)
CPA measures how much it costs to acquire a paying customer, while CPL measures how much it costs to generate a qualified contact. They are complementary metrics:
CPA = Total Marketing Spend / Number of Customers Acquired
CPL = Total Marketing Spend / Number of Leads Generated
The difference between the two is crucial. A low CPL might look excellent, but if those leads never convert into customers, you are paying for thin air. That is why it is also essential to monitor the lead-to-customer conversion rate.
In the Italian market in 2026, average CPLs by channel are approximately:
- Google Ads (search): €15-45 for B2B, €8-25 for B2C
- Meta Ads: €5-20 for B2C, €25-60 for B2B
- LinkedIn Ads: €40-120 for B2B
- SEO (organic): €5-15 (calculated on an annual basis, dividing SEO investment by organic leads)
Your agency should provide these figures segmented by channel and campaign, not as an aggregate average. An average CPL of €20 could hide one campaign at €5 and another at €35 — and it would be a shame not to know.
3. CAC (Customer Acquisition Cost)
CAC is the big brother of CPA: it includes all costs related to acquiring a customer, not just advertising costs. The full formula is:
CAC = (Marketing Spend + Agency Fees + Internal Marketing Costs + Sales Costs) / New Customers Acquired
CAC is the most honest metric because it hides nothing. If your agency costs €3,000/month, you spend €5,000/month on ads, you have an in-house marketing manager at €3,500/month, and you acquire 20 customers per month, your CAC is €575.
The fundamental question is: is that customer worth more than €575? To answer that, you need the next metric.
4. LTV (Lifetime Value)
Lifetime Value measures how much a customer is worth over the entire business relationship. It is the metric that puts CAC into context:
LTV = Average Order Value × Annual Purchase Frequency × Average Relationship Duration (in years)
The LTV:CAC ratio is one of the most powerful indicators of all. As a general rule:
- LTV:CAC < 1:1 — You are losing money on every customer. Critical situation
- LTV:CAC between 1:1 and 3:1 — Margin too thin. The agency needs to improve or you are overspending
- LTV:CAC between 3:1 and 5:1 — Sweet spot. Good balance between growth and profitability
- LTV:CAC > 5:1 — You are probably under-investing in marketing. There is room to scale
Many agencies do not calculate LTV because it requires data that the client often does not share. But if you truly want to measure ROI, you must share these numbers. Without LTV, any CAC assessment is incomplete.
5. Conversion Rate
The conversion rate measures the percentage of visitors (or leads) who take the desired action. It applies at multiple levels of the funnel:
CR = (Conversions / Visitors or Leads) × 100
- Website CR: visitors → leads (form submission, call, chat). Italy 2026 average: 2.1%-3.8% for optimized landing pages
- Email CR: opens → clicks → conversions. Italy average: 22% open rate, 3.1% CTR
- Sales funnel CR: leads → opportunities → customers. Italy B2B average: 15-25% lead-to-opportunity, 20-35% opportunity-to-close
The conversion rate is a diagnostic metric: if traffic grows but conversions do not, the problem could be traffic quality (the agency's responsibility) or the website's user experience (a shared responsibility). A serious agency will analyze both aspects.
6. Organic traffic (growth and quality)
If you invest in SEO — and in 2026 you should — organic traffic is a fundamental metric. But looking at raw visit numbers is not enough. You need to analyze:
- Month-over-month and year-over-year growth: SEO is a medium- to long-term investment. Expect significant results after 6-12 months
- Brand vs. non-brand traffic: if 90% of your organic traffic comes from branded keywords (your company name), SEO is not working. The value of SEO lies in non-brand traffic
- Target keyword rankings: how many strategic keywords are in the top 3? Top 10? Is the trend going up or down?
- Lead-generating pages: does organic traffic convert? Which pages bring contacts and which only bring visits?
A reasonable benchmark for the Italian market in 2026: a strong SEO project should generate a 30-50% increase in non-brand organic traffic in the first year, with organic CPL progressively dropping below €10 from the second year onward.
7. Brand Awareness and Share of Voice (SOV)
Share of Voice measures your brand's visibility relative to competitors in a given market. It can be calculated across different channels:
SOV = Your Brand's Visibility / Total Market Visibility × 100
- Organic SOV: percentage of keywords you rank for vs. competitors (measurable with SEMrush, Ahrefs)
- Paid SOV: impression share on Google Ads
- Social SOV: brand mentions vs. competitors (measurable with social listening tools)
SOV is particularly important for companies investing in brand building. A well-known rule of thumb known as "the Binet and Field rule" suggests that SOV should be slightly higher than market share to drive growth: if you hold 10% of the market, aim for an SOV of 12-15%.
This is a metric the agency should monitor quarterly and present within the competitive context, not in isolation.
8. Email Marketing ROI
Email marketing remains the channel with the highest ROI overall. According to DMA data updated to 2026, the average email marketing ROI in Europe is 38:1 — meaning €38 in return for every euro invested.
Email ROI = (Email Revenue - Email Marketing Costs) / Email Marketing Costs × 100
Costs include: the platform (Mailchimp, ActiveCampaign, Brevo), agency fees for strategy and copywriting, and graphic production costs. Key metrics to monitor:
- Deliverability rate: should be >95%. Below 90%, there is a technical issue
- Open rate: Italy 2026 average: 22-28% (varies by industry)
- Click-through rate: Italy average: 2.5-4%
- Revenue per email: revenue generated divided by number of emails sent
- Unsubscribe rate: should remain below 0.3% per send
If the agency manages your email campaigns and does not provide these figures segmented by campaign type (newsletters, automations, promotions), you are flying blind.
9. Social Media ROI
Measuring social media ROI is notoriously complex, because social media operates on multiple levels: awareness, engagement, traffic, and conversions. The basic formula is:
Social ROI = (Value Generated from Social - Social Marketing Costs) / Social Marketing Costs × 100
The "value generated" part is the tricky one. It includes:
- Direct conversions: sales or leads attributable to social (trackable with UTM and pixel)
- Assisted conversions: social as a touchpoint in the purchase journey (visible in GA4)
- Engagement value: harder to quantify, but an engaged follower has long-term value
For the Italian market in 2026, a competent agency should show you:
- Qualified follower growth (not bought)
- Engagement rate: Italy average Instagram 2.1%, LinkedIn 3.8%, TikTok 5.2%
- Website traffic from social
- Attributed leads and conversions
- Cost per engagement and cost per click to the website
10. MER (Marketing Efficiency Ratio)
MER is the most holistic metric of all. Born as a response to the tracking limitations after iOS 14.5, MER looks at the overall picture:
MER = Total Revenue / Total Marketing Spend
Unlike ROAS, which focuses on individual channels, MER considers all revenue and all marketing spend. An MER of 5:1 means that for every euro of marketing (all channels, including agency fees) the company generates five euros in revenue.
MER is particularly useful because:
- It does not depend on attribution (which is always imperfect)
- It captures the combined effect of all channels, including those that are hard to track
- It provides a clear trend: if MER improves month after month, the overall strategy is working
A good MER for an Italian company varies between 3:1 and 8:1 depending on the industry and profit margin. What matters is that it is stable or growing and that it exceeds the 1/(gross margin) ratio to remain profitable.
How to set up a reporting system with your agency
Having the right metrics is useless if you do not have a structured system for collecting, analyzing, and discussing them. Here are the 5 steps to build an effective reporting framework with your agency.
Step 1: Define KPIs before you start
The best time to agree on evaluation metrics is before signing the contract. Clearly specify which KPIs you expect in the monthly report, what the targets are (even approximate), and what the timeframe is for reaching them. A serious agency will welcome this request enthusiastically — it is a sign of a mature and collaborative client.
Step 2: Establish reporting frequency
Not all KPIs require the same monitoring frequency:
- Weekly: ROAS, CPA/CPL, conversion rate, budget spend (for active campaigns)
- Monthly: organic traffic, email ROI, social media metrics, MER
- Quarterly: LTV, CAC, SOV, brand awareness, strategic review
Step 3: Request direct access to data
Do not settle for PDFs. Request direct access to Google Analytics 4, Google Ads, Meta Business Suite, and Search Console. An agency that refuses to give you access to your own data is a huge red flag. The data is yours — the agency manages it, it does not own it.
Step 4: Organize structured review meetings
A 60-90 minute monthly meeting with a fixed agenda:
- Monthly results vs. objectives (15 min)
- Channel analysis: what worked, what did not (20 min)
- Corrective actions and planned tests (15 min)
- Strategic update and next steps (15 min)
- Q&A (15 min)
Step 5: Review targets every quarter
Benchmarks change, markets evolve, your company grows. Targets set in January may be obsolete by June. Every quarter, reassess KPIs in light of the results achieved and market conditions. A target that is too easy does not push the agency to improve; an unattainable one demotivates it.
When ROI is not enough: qualitative metrics
Not everything that counts can be counted. Alongside quantitative metrics, there are qualitative indicators that influence the long-term value of your marketing investment.
Brand Sentiment
How does the public perceive your brand? Sentiment is measured through:
- Social listening: tone analysis of social media mentions
- Online reviews: average rating trends on Google, Trustpilot, and industry-specific platforms
- Surveys: periodic surveys of a sample of customers and prospects
An agency that performs well does not just deliver numbers — it improves brand perception over time. A revenue increase at the expense of reputation (for example, through aggressive tactics or excessive promises) is a short-term gain that comes at a steep cost.
Customer Satisfaction (NPS and CSAT)
The Net Promoter Score (NPS) and Customer Satisfaction Score (CSAT) are not directly attributable to the agency, but marketing influences customer expectations. If campaigns promise more than the product or service delivers, CSAT drops — and with it, the retention rate and LTV.
Monitor NPS quarterly and share it with the agency. If you notice a decline correlated with specific campaigns, it is an important signal to discuss together.
Quality of the agency-client relationship
An often overlooked but fundamental metric is the quality of the collaboration itself. Periodically assess:
- Is the agency proactive or reactive? Does it propose ideas or wait for instructions?
- Is communication smooth? Are response times reasonable?
- Is there transparency about problems? Does the agency admit mistakes or hide them?
- Is the team stable? Frequent account manager changes are a negative signal
8 signs that the agency is NOT delivering results
Sometimes the numbers are ambiguous, but certain behaviors speak volumes. Here are the red flags that should raise your alarm.
1. Reports full of vanity metrics
If the monthly report talks about impressions, reach, and followers but not about leads, conversions, and revenue, the agency is shifting focus to metrics that make it look good without demonstrating business results. Impressions do not pay the bills.
2. No direct access to data
If the agency runs campaigns on its own accounts, and you have no access to Analytics or advertising accounts, the trust relationship is compromised from the start. And when the contract ends, you risk losing all your historical data.
3. Opaque budget
You need to know exactly how much goes to media spending and how much to management fees. If the agency bills you a single lump sum without a breakdown, you cannot calculate the real ROAS. Always request the breakdown and verify that it matches what is actually being spent on the platforms.
4. Static strategy
If the agency has been doing the same things for six months without testing anything new, without proposing optimizations, without reacting to market changes, you are paying for autopilot. Digital marketing requires continuous experimentation — A/B tests, new formats, new channels, new audiences.
5. Results always "coming soon"
Every channel has its natural timeline: SEO takes months, content marketing as well. But if after 12 months of SEO you see no organic growth, or after 3 months of ads the numbers are not improving, the excuses are over. Ask for a corrective plan with precise milestones and defined timelines.
6. One-way communication
The agency sends the report and disappears until the following month. It does not ask for feedback, does not propose alignment calls, does not provide interim updates. A healthy relationship requires two-way, ongoing communication — not a PDF once a month.
FAQ
What is the average ROI of a marketing agency in Italy?
It depends heavily on the channel and industry. As a general rule, a competent agency should generate an overall ROI (MER) of at least 3:1 — meaning 3 euros of revenue for every euro invested in marketing (including agency fees). For mature paid campaigns, a ROAS of 4:1 or higher is expected. For SEO, ROI grows exponentially from the second year onward, potentially reaching 10:1.
How soon should I expect to see results from the agency?
For paid campaigns (Google Ads, Meta Ads), initial results are visible within 2-4 weeks, with full optimization in 2-3 months. For SEO, expect significant movement after 4-6 months and mature results after 9-12 months. For content marketing and brand building, the horizon is 6-18 months. Be wary of anyone promising immediate results on channels that require time.
How can I calculate ROI if I sell offline?
Offline tracking is more complex but not impossible. Some solutions: ask new customers how they found you (and record it in your CRM), use dedicated phone numbers per channel, implement trackable coupons, and use Google Ads offline conversions (upload CRM data matched with clicks). CPL is the most reliable metric for businesses with offline conversions.
How much should I spend on a good marketing agency?
The typical agency fee in Italy in 2026 ranges between 10% and 20% of media spend for paid campaign management, with a monthly minimum varying from €500 to €3,000 depending on agency size. SEO services range from €800 to €3,000/month. For integrated management (paid + SEO + social + content), expect €2,500-€8,000/month. The fee is not the cost to minimize: a more expensive agency that generates a higher ROAS is a better investment.
Is a specialized or full-service agency better?
It depends on the complexity of your needs. For SMEs with a media spending budget of up to €5,000/month, a full-service agency offers the advantage of a single point of contact and an integrated strategy. For companies with larger budgets or very specific needs (e.g., technical SEO for e-commerce, advanced performance marketing), a specialized agency brings deeper expertise. In any case, measure results with the same metrics — specialization is not a guarantee of ROI.
Should the agency guarantee results?
No serious agency guarantees specific results, because marketing depends on too many external variables (market, competitors, product, seasonality). However, a professional agency should propose realistic objectives with expected result ranges, intermediate milestones to verify progress, and reasonable exit clauses if minimum results are not achieved. Be wary of anyone guaranteeing first-page Google rankings or a specific ROAS.
How do I know if the budget is being spent wisely?
Three essential checks: verify the match between what the agency bills you and what is actually spent on the platforms (check directly in the ad accounts); compare your KPIs against the industry benchmarks presented in this article; monitor the trend — not a single month, but the quarterly trajectory. If numbers are consistently improving, the budget is probably well spent. If they have been stagnant for more than a quarter, it is time to dig deeper.
What tools do I need to monitor the agency's ROI?
The minimum setup includes: Google Analytics 4 (free) for website tracking, Google Search Console (free) for SEO performance, direct access to ad platforms (Google Ads, Meta Business Suite), and a spreadsheet or dashboard (Google Looker Studio is free) to consolidate KPIs. For more advanced monitoring: SEMrush or Ahrefs for SOV and SEO analysis (from €100/month), a CRM (HubSpot free tier or Pipedrive from €15/month) for lead-to-customer tracking, and a social listening tool like Brand24 or Mention for brand sentiment.
Sources and references
- Google — Economic Impact Report: Italy 2025 — data on average Google Ads ROI by industry in the Italian market
- HubSpot — State of Marketing Report 2025 — global and European benchmarks on conversion rates, CPL, email marketing
- Statista — Digital Advertising Spending in Italy 2024-2026 — spending trends and forecasts for the Italian market
- Nielsen — Total Audience Report and Share of Voice Studies — correlation between SOV and market share
- DMA (Data & Marketing Association) — Email Marketing ROI Report 2025 — email marketing ROI benchmarks in Europe
- Les Binet & Peter Field — The Long and the Short of It — research on long-term marketing effectiveness and the SOV/SOM rule
