Integration and how data flows
The average marketing tech stack is 12+, so if data from other systems like your CRM or quoting and invoicing software isn't syncing back to HubSpot, you end up with an incomplete and inaccurate picture of ROI.
It’s vital to decide which systems should be integrated, and which owns which data point. Field mapping matters here because if a field in your ERP is free text but a dropdown in HubSpot, the sync will either fail or produce inconsistent values, both of which feed straight into your reports. For complete confidence in your marketing metrics, you need complete confidence in your integration, data flow, and lead routing.
Implementation and property architecture
Another technical consideration is how HubSpot itself has been configured and maintained. For example, properties that were created ad hoc over time without a consistent naming convention tend to accumulate in every portal, which means that once you start building reports, the inconsistencies multiply. A lifecycle stage might mean one thing to marketing and something slightly different to sales, or users can skip required fields that weren’t set as mandatory, leaving gaps in every report that depends on that data.
Duplicate contacts and companies compound this further, because they inflate conversion metrics, confuse attribution, and make every number less reliable. HubSpot has built-in deduplication tools, but in our experience, these aren’t always utilised.
Data readiness and lead scoring
Research suggests that a whopping 82% of marketers don't trust their own attribution data, and a solution is better data discipline in how deals and contacts are created and associated.
For HubSpot attribution reporting to work accurately, every contact must be associated with the correct deal, every deal associated with the correct company, and every interaction tracked with properly formatted UTM parameters so HubSpot can credit the right channel.
The most common reason this chain breaks is that a sales rep creates a deal on a company record but doesn't associate the specific contact who engaged with marketing, at which point HubSpot has no way to trace the journey from that blog post or email campaign through to closed revenue, and the marketing activity gets no credit at all.
This gets more complex in B2B, where a buying committee of six to ten people might all influence the decision, but only one or two end up formally associated with the deal in HubSpot, which means attribution can only credit the contacts it knows about, and the degree of marketing influence often goes underreported.
Lead scoring as a reporting prerequisite
HubSpot lead scoring is used as a tool for sales prioritisation, e.g., identifying which leads are most likely to convert, so reps can focus their time accordingly. But lead scoring also plays a role in HubSpot reporting, because without scoring, your reports can tell you how many MQLs marketers generated, but they can't tell you whether those MQLs were any good, and the quality question is the one the C-suite is interested in.
When behavioural and demographic scoring is in place, you can segment reports by lead quality, compare channel performance based on the leads they produce rather than just the volume, and draw a much more direct line between marketing activity and revenue, which also creates a feedback loop where better scoring informs better reporting and better reporting highlights where your scoring model needs refining.