Annual budgeting has always required financial institutions to make educated assumptions about the future. Loan growth, deposit trends, funding costs, operating expenses, and other variables all shape the strategic decisions that guide an institution through the coming year.
What’s changed in recent years is the level of uncertainty surrounding those assumptions. Shifts in customer behavior, margin pressure, changing economic conditions, and evolving growth expectations have reinforced an important reality: a budget built around a single set of assumptions may not provide management with the flexibility it needs when conditions change.
While even the most experienced financial institution executives can't predict every market turn, leadership teams can prepare for a range of plausible outcomes. Incorporating scenario testing and "what-if" modeling before the budget is finalized gives management an opportunity to challenge assumptions, compare potential outcomes, and make more informed decisions about the path forward before committing resources.
Scenario Testing Before You Finalize the Plan
Financial institutions generally operate under a Board-approved annual budget that establishes financial targets and provides an important benchmark for measuring performance throughout the year. Scenario planning allows management to test the assumptions behind that budget and understand how the institution could be affected if conditions unfold differently than expected. That's why evaluating a range of "what-if" scenarios is an important part of the planning process before the annual budget is finalized.
For example, consider some of these questions that may arise during the budgeting process:
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What if loan growth comes in below expectations?
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What if deposit costs remain elevated longer than anticipated?
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What happens if deposit growth accelerates – or customers begin moving funds elsewhere?
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What if loan losses are higher than anticipated?
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What if an unexpected growth opportunity emerges midway through the year?
Testing questions like these allows management to see how changes in one assumption can affect the institution's broader financial outlook. It can also reveal how internal and external factors may impact net interest margin, earnings, liquidity, capital, and growth.
The objective isn't to forecast every possible future. It's to evaluate a range of potential outcomes, consider how the institution would respond, and use those insights to build the preferred path forward into the final budget.
There’s another benefit to considering multiple outcomes: it can help challenge the thinking behind the plan itself. McKinsey & Company has highlighted scenario planning as one way to counter confirmation bias by encouraging decision-makers to consider multiple possible outcomes rather than gravitating toward the one they expect—or prefer—to occur (Huber et al. 2022). During budgeting season, that discipline can help management pressure-test its assumptions before they become part of the institution's approved financial plan.
While many teams recognize the value of scenario planning, they struggle to find the time and efficient tools to do it. When budgets live inside complex, interconnected spreadsheets, even minor changes can require recalculating formulas, updating reports, validating links, and managing new versions. Without a proper model, what-if testing consumes time that management could otherwise spend analyzing results.
From Static Variances to Continuous Reforecasting
The value of scenario planning doesn't end once the budget is approved. In fact, some of its greatest value becomes apparent when actual results begin to diverge from assumptions made during budget season.
Loan demand may be stronger or weaker than expected. Deposit behavior changes. Expenses could move differently than projected. New risks or opportunities might emerge.
The approved budget still serves an important purpose. It establishes the institution's original financial targets and provides a consistent baseline for comparing actual results throughout the year. But as conditions change, management needs an updated view of where the institution is realistically headed.
That's where reforecasting becomes valuable.
Traditionally, when actual performance differs from the budget, teams spend significant time identifying and explaining variances. That analysis remains important, but it is inherently backward-looking. It explains what has already happened.
Reforecasting adds a forward-looking perspective. Instead of changing the original budget when conditions change, management can preserve the approved budget while incorporating actual results and updated assumptions into its forecast for the remainder of the year.
A variance reveals where actual results differed from the plan; a reforecast adjusts for current realities to show where the institution may be headed next.
One of the biggest benefits of scenario planning and reforecasting is that they can lead to more productive discussions among management, ALCO, and the Board. Rather than relying on gut instinct, leadership can use actual data to evaluate different "what-if" scenarios and see how changes ripple through the financials before making decisions.
As the year progresses, those discussions can move beyond simply explaining why actual results differed from the original budget. Leadership can evaluate what changed, whether those trends are likely to continue, how they could affect future performance, and what actions may be appropriate as a result.
The conversation moves from "Why did we miss budget?" to another equally important question: "Given what we know now, what should we do next to get back on track?"
Making Scenario Planning Practical
The value of scenario planning and reforecasting depends partly on how practical they are to perform. If every new scenario requires another spreadsheet, another round of formula checks, and another set of manually updated reports, management may be limited in how frequently it can explore alternative outcomes. A process designed to provide better information can lose much of its value if maintaining it requires significant manual effort.
Financial institutions appear to recognize the broader need for technology modernization. According to the 2026 Banking Trust & Technology Outlook published by Independent Banker, 45% of banking executives expect their technology budgets to increase by at least 40% in 2026. At the same time, 64% report that they lack full visibility into total IT spending (ICBA 2026). The report describes this disconnect as a "modernization paradox": institutions are investing more in technology while still struggling to understand where those dollars are going and which systems are delivering value.
Modernization should ultimately make complex processes simpler, not add more disconnected software to manage. Modern planning systems, such as Plansmith's suite of tools, can reduce the friction behind budgeting by allowing teams to change assumptions, compare scenarios, incorporate actual results, and update projections without rebuilding the financial model each time.
The greatest value of a true planning system is more time interpreting results, evaluating risks and opportunities, and making informed decisions based on data.
A More Productive Planning Cycle
A budget will always represent management's best assumptions at a particular point in time. Some will prove accurate; others won't.
That doesn't make the budget unsuccessful. The greater risk is treating those original assumptions as the only possible path forward.
The Board-approved budget provides the target. Scenario testing helps management understand how that plan could perform under different conditions. Reforecasting provides an updated view as actual results and new information emerge.
Together, they create a more useful planning cycle – one that allows management to spend less time reacting to what has already happened and more time evaluating what may happen next.
The goal isn't to build a budget that predicts the future perfectly. It's to build a planning process that helps your institution make informed decisions knowing that the future is unlikely to go exactly according to plan.
If you're curious how Plansmith can modernize your budgeting and forecasting processes, click here to schedule a discussion with our team.
Jim Groark
COO & EVP - Product Development
References
Independent Community Bankers of America. “2026 Banking Trust & Technology Outlook: What Community Bank Leaders Need to Know.” Independent Banker, 1 June 2026.
Huber, Celia, Nora Aufreiter, and Ophelia Usher. “The Role of the Board in Preparing for Extraordinary Risk.” McKinsey & Company, 22 Mar. 2022.