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Planning on Solid Ground: 5 Key Challenges in Baselining Actuals for Planning 

by LumelMay 14, 2025, |

Let’s talk about that all-important starting line for any financial plan, budget, or forecast: the actuals baseline. Every FP&A professional knows it's the bedrock. Without a clear, trustworthy view of where you've been, confidently charting where your business is going feels a bit like navigating a ship in a storm with a map sketched on a napkin. 

It sounds simple enough, right? Just pull last year's numbers and you're good to go? If only! As finance teams across the globe gear up for mid-year reviews or start looking towards the next planning cycle, the reality of establishing a true actuals baseline often reveals itself to be a complex beast. It’s far more nuanced than a quick data dump. 

So, what makes this seemingly straightforward task so tricky? Let's dive into five key challenges that can turn your baseline into shaky ground, undermining your entire planning effort. 

Challenge 1: The Data Quality Quagmire – Garbage In, Garbage Baseline 

This one's the classic. If the historical actuals data pulled from your ERP or accounting systems is messy, your baseline will be too. It’s the ultimate "garbage in, garbage out" scenario. 

  • The Issue: We're talking misclassified expenses that make one department look like a hero while another takes the hit, incomplete revenue recognition from a chaotic sales process, missing transactional details that obscure true costs, or just plain old data entry errors. 
  • Impact on Baseline: These inaccuracies get baked directly into your starting point. If last year's "Marketing Spend" was artificially low due to miscodings, using that as a baseline will lead to under-budgeting this year. 
  • FP&A's Headache: Instead of strategic analysis, your team ends up playing detective, spending countless hours cleaning, validating, and manually correcting historical data before the real baselining work can even begin. Talk about a planning cycle slowdown! 

Challenge 2: The Normalization Nightmare – Adjusting for Past "Noise" & One-Offs 

Historical actuals are rarely a perfect reflection of "normal" business operations. They're often peppered with one-time events or significant changes that aren't expected to repeat. 

  • The Issue: Think about large restructuring charges, gains or losses from selling a subsidiary, the impact of a major (and temporary) supply chain disruption, a significant legal settlement, or even the lingering, unique effects from global events like the early pandemic years. Accounting policy changes or shifts in business models also muddy the waters. 
  • Impact on Baseline: If you don't "normalize" – that is, adjust for – these extraordinary items, your baseline won't represent ongoing operational reality. This can dramatically skew your forecasts and make year-over-year comparisons misleading. Imagine basing future growth on a year that included a massive, unrepeated asset sale! 
  • FP&A's Headache: This is where art meets science. Identifying all these unusual events, accurately quantifying their financial impact (which isn't always clearly isolated in the GL!), and then agreeing on the right pro-forma adjustments is often subjective, incredibly time-consuming, and usually requires a deep dive with multiple stakeholders. 

💡 Callout: The "One-Off" Trap! 

Remember that huge, unexpected contract win last Q3 that massively inflated sales? Or the factory shutdown that torpedoed COGS for a month? If these aren't carefully identified and adjusted in your baseline, your next forecast could be built on a house of cards, either wildly optimistic or unnecessarily conservative. 

Challenge 3: Bridging the Granularity Gap & Hierarchy Headaches 

The way your ERP captures actuals versus how FP&A needs to plan can often feel like two different languages. 

  • The Issue: Your ERP’s Chart of Accounts might be structured for statutory reporting, with actuals recorded at a highly granular, transactional level. For planning, however, FP&A often needs a more summarized, management-oriented view (e.g., planning by strategic product group while actuals hit at the individual SKU level, or planning for a new consolidated department before its official cost center exists). Hierarchies for customers, products, or organizational units might also differ or be out of sync. 
  • Impact on Baseline: It becomes a significant task to appropriately aggregate transactional actuals to match planning dimensions or, conversely, to disaggregate them logically if needed. You risk losing crucial detail in the aggregation or creating misleading summaries if the mapping isn't perfect. 
  • FP&A's Headache: This often translates into maintaining complex data mapping tables (hello, VLOOKUP nightmares of the past, or slightly more sophisticated mapping logic in modern tools!). There's a constant effort to ensure ERP structures and planning model dimensions/hierarchies stay aligned as the business inevitably changes. 

Challenge 4: The Systems Maze – Extracting, Integrating & Consolidating Data 

For many enterprises, actuals data isn't neatly packaged in one accessible spot. 

  • The Issue: It might be spread across multiple ERP instances (a common scenario after mergers and acquisitions), various CRM systems for sales data, specialized operational databases, or even lingering legacy systems for certain business units. Pulling all this together into a coherent, consolidated dataset for baselining can be a major technical and logistical feat. 
  • Impact on Baseline: This fragmentation can lead to delays in accessing complete actuals for the planning cycle. There's a high risk of data inconsistencies if information is pulled from different systems at slightly different times or using different extraction logic. Data loss or corruption during transfers is also a concern. 
  • FP&A's Headache: Heavy reliance on IT or specialized data teams for custom extracts. Time spent waiting for data dumps instead of analyzing information. Manual efforts to piece together disparate datasets, often with a high risk of error. 

Challenge 5: Ensuring Historical Relevance & Consistent Definitions in a Changing World 

The business world doesn't stand still, and what happened last year, or three years ago, might not be a good indicator of the future if the context has changed significantly. 

  • The Issue: Your company might have launched new blockbuster products, discontinued old lines, undergone a major reorganization, entered new markets, or seen a fundamental shift in its competitive landscape. How relevant is data from a pre-transformation era? Furthermore, definitions of key metrics or segments (like "Active Customer" or "Key Account") can evolve over time. 
  • Impact on Baseline: Using historically irrelevant data or data based on outdated definitions creates a baseline that offers a poor foundation for projecting future performance. Your assumptions will be built on a past that no longer reflects the present or the intended future. 
  • FP&A's Headache: The challenging task of determining the appropriate historical window for baselining. Sometimes, a deep dive is needed to recast historical data to align with current business structures or metric definitions for a true "apples-to-apples" comparison – a significant, often manual, undertaking. 

Why Conquering These Challenges is Non-Negotiable 

Establishing a trustworthy and relevant actuals baseline isn't just about making FP&A's life easier. It's fundamental to: 

  • Creating accurate and achievable budgets and forecasts. 
  • Conducting meaningful variance analysis that reveals true business drivers. 
  • Building credibility for the finance function across the organization. 
  • Supporting sound strategic decision-making by leadership. 

Paving the Way for a Truer Baseline: Where to Start 

While these challenges are significant, they aren't insurmountable. Progress usually involves a combination of: 

  • Robust Data Governance: Clear ownership, defined standards for data quality, and consistent processes. 
  • Proactive Data Quality Initiatives: Actively working to cleanse and maintain the integrity of data in source systems. 
  • Modern FP&A & Data Integration Tools: Leveraging platforms with strong capabilities for data ingestion, mapping, transformation, and adjustment. 
  • Documented Methodologies: Having clear, agreed-upon approaches for how normalizations and baseline adjustments will be made. 
  • Cross-Functional Collaboration: Ensuring FP&A, Accounting, IT, and relevant Business Units are aligned on data definitions and processes. 

Your Plan is Only as Strong as Its Foundation 

Establishing a "true" actuals baseline is clearly more than a simple data pull. It's a critical process that requires navigating hurdles related to data quality, historical normalization, structural alignment, system integration, and ongoing relevance. 

While demanding, the effort dedicated to creating a clean, consistent, and relevant baseline is an investment that pays substantial dividends. It doesn't just streamline the planning process; it enhances the accuracy of your forecasts, the insightfulness of your analysis, and the overall strategic value delivered by the FP&A function. For finance teams aiming for confident leadership and impactful insights, getting this foundation right is paramount. 

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