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Hire a Microsoft Excel specialist who works inside your actual files

You know exactly what needs to be built or fixed in Excel. You just do not have the hours to sit down and do it. Trusty Oak's fractional specialists work directly inside your Excel files and shared drives, handling everything from formula logic and pivot table builds to multi-sheet reporting models and cross-workbook data connections. This is not consulting from a distance. A specialist gets access to your environment, reviews what you have, and gets to work on deliverables you can see and use.

What our team does with Microsoft Excel

Concrete work our fractional specialists take on inside your Microsoft Excel account. No vague promises.

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Build Structured Workbooks from Scratch

When you need a net-new file built to spec, our specialists design multi-tab workbooks with named ranges, data validation rules, and protected sheet structures so users can only enter data where intended. We set up consistent formatting, input sheets, and summary views before handing the file back to you. Every workbook includes a documentation tab explaining how it is structured and how to maintain it.

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Fix Broken Formulas and Audit Existing Files

If a file has accumulated broken references, circular dependencies, or formulas that no longer match your business logic, we trace and correct them using Excel's auditing tools including Trace Precedents, Evaluate Formula, and the Name Manager. We document what was changed and why so nothing is a black box going forward. This is especially useful before a file gets handed to a new team member or used in a client-facing context.

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Design Dynamic Reports with Pivot Tables and Charts

We build PivotTable and PivotChart setups connected to structured data tables so reports can be refreshed with a single click as source data updates. Slicers, timelines, and conditional formatting are applied where they add clarity rather than clutter. The goal is a report someone can hand to a stakeholder without explaining how to read it.

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Automate Repetitive Tasks Using Power Query and Macros

For work that runs on a recurring cycle, such as pulling in a new data export, cleaning it, and reformatting it for a report, we use Power Query to build repeatable transformation steps that run without manual intervention. Where Power Query is not the right fit, we write VBA macros to handle button-triggered actions like formatting a sheet, generating a summary, or exporting specific ranges to a new file. We comment all code so it can be maintained or modified later.

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Connect Excel to External Data Sources and Other Tools

We set up live or scheduled data connections between Excel and sources like SharePoint lists, SQL databases, Power BI datasets, or exported CSV feeds from tools like QuickBooks, Salesforce, or HubSpot. Using Power Query's Get and Transform features, we build queries that pull, clean, and load external data into a structured table format your formulas and PivotTables can use reliably. This removes the manual export-paste-format loop from recurring reporting tasks.

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Migrate and Consolidate Legacy Spreadsheets

When a business has accumulated dozens of siloed files tracking the same data in different formats, we audit the full set, identify redundancies, and consolidate them into a single source of truth with consistent column structures and lookup logic. We handle the data cleaning, deduplication, and formula rebuilding required to make the consolidated file accurate before you retire the old ones. Where migration to a database or a tool like Airtable makes more sense long-term, we flag that during the audit.

How Trusty Oak supports Microsoft Excel workflows

How the Microsoft Excel handoff works

During onboarding, your Client Success Manager reviews your existing Excel files and asks targeted questions about what is working, what is broken, and what you are trying to produce on a recurring basis. From there, we build a prioritized roadmap that identifies which files to fix first, which workflows to automate, and where a rebuild makes more sense than a patch. A specialist is then assigned to your account and works directly in your files, not in a copy, so the output is immediately usable. We document every workbook we build or modify with a notes tab or a separate reference file, and you review and approve work before it is considered complete. For ongoing engagements, we handle scheduled refreshes, formula updates as your data structure changes, and new build requests as they come up.

Common Microsoft Excel workflows we build

A few of the most common workflows our team has deployed with Microsoft Excel.

1

Monthly Sales Data Export to Formatted Executive Report

A CRM or accounting tool exports raw transaction data as a CSV each month. We pull that file into a Power Query connection, apply standard cleaning steps, and refresh a pre-built PivotTable dashboard that produces a formatted summary report ready for leadership review without any manual reformatting.

2

Job Costing Tracker: Project Inputs to Margin Summary

Labor hours, material costs, and billable amounts are entered into a structured input sheet by project managers. Formulas and a summary PivotTable calculate gross margin per job and flag projects below target thresholds using conditional formatting, giving operations leads a real-time view of profitability without touching the raw data.

3

Inventory Log with Reorder Alerts and Supplier Lookup

A product inventory sheet uses VLOOKUP or XLOOKUP to pull supplier lead times and reorder quantities from a reference table, then applies conditional formatting rules to flag SKUs that have dropped below minimum stock levels. This replaces a manual weekly review with a color-coded dashboard that updates as quantities are entered.

4

Multi-Sheet Budget Model with Scenario Comparison

We build a budget workbook with separate input sheets for each department that feed into a consolidated P and L summary using structured references. A scenario tab uses Excel's named ranges and data validation dropdowns to let finance teams toggle between conservative, base, and optimistic assumptions and see the impact across all line items instantly.

5

Client Deliverable Tracker Synced from Project Management Export

A weekly export from tools like Asana, Monday.com, or ClickUp is dropped into a designated folder or pasted into a raw data tab. Power Query cleans and reshapes the export into a standardized tracker that shows deliverable status, owner, and due date, with a summary tab that rolls up completion rates by client or team.

What Microsoft Excel support costs

Drag the sliders to build a monthly plan that fits your workload.

Executive Assistants
~$35/hour
10 hours $350
Specialists
~$50/hour
20 hours $1,000
Fractional Executives
~$95/hour
0 hours $0
Your monthly budget
$1,350

Starting at $1,000/month. One-time $300 onboarding fee includes your Strategic Delegation Plan.

Book a Discovery Call

Frequently asked questions

For files stored in OneDrive or SharePoint, we request access to specific folders or files through your Microsoft 365 environment so you control permissions at all times. For locally stored files, clients typically share them via a shared drive, Dropbox, or a secure file transfer. We never store your files outside the environment you designate, and access is scoped to only what is needed for the work.
Most of our Excel clients use ongoing monthly hours for recurring work like refreshing reports, updating models as business data changes, and handling new build requests as they come up. The monthly talent budget starts at $1,000 per month, and unused hours roll over, so you are not penalized if a given month is lighter. Specialists at the $50 per hour rate handle most Excel work, though complex financial modeling or data architecture may involve a Fractional Executive at $95 per hour.
If your team is already in Microsoft 365 and your files are stored in SharePoint or OneDrive, Excel is usually the right call because Power Query, Power Pivot, and VBA give you capabilities that Google Sheets does not match at scale. If you are doing lightweight list management or need real-time collaboration across a non-Microsoft team, we will tell you honestly during onboarding if Google Sheets or Airtable would serve you better. We work in both, and our goal is to set you up in the tool that will hold up as your needs grow.
Our specialists working in Excel are comfortable with advanced formula logic including array formulas, XLOOKUP, and INDEX MATCH, as well as Power Query, PivotTables, and VBA for task automation. For work involving Power Pivot, DAX, or integration with Power BI, we match you with a specialist who has direct experience in those areas. During onboarding, your Client Success Manager confirms the right skill match before work begins.
Everything built in your account stays in your account. We do not use proprietary systems or locked templates, so you retain full ownership of every file, formula, and Power Query connection we create. Because we document our work inside each file, your team or a future hire can pick up where we left off without needing to reverse-engineer anything.

Get your Excel files working for you

Book a discovery call and we will review your current Excel setup, identify the highest-priority fixes or builds, and give you a clear roadmap before any work begins. The onboarding fee is $300 and includes a Strategic Delegation Plan tailored to your workflows.