How to Resolve Spill Error in Excel: Step-by-Step Guide

Spill Error in Excel occurs when a formula using dynamic arrays tries to output multiple values, but there isn't enough space in adjacent cells. This issue often arises when using formulas like FILTER, UNIQUE, SEQUENCE, and SORT in Excel 365 and Excel 2019, which support dynamic arrays. Understanding why this happens and how to fix it can help streamline your data management.

In this guide, we’ll explore the causes of the spill error and provide step-by-step solutions to resolve it.

What Causes Spill Error in Excel?

The spill error occurs due to one of the following reasons:

1. Blocked Spill Range – If adjacent cells contain data, the formula cannot expand into them.

2. Merged Cells – Merged cells within the spill range prevent the array formula from displaying results.

3. Non-Empty Cells in the Range – Even a single space or hidden content can block the spill.

4. Dynamic Array Conflicts – If another formula overlaps the spill range, Excel prevents expansion.

5. Workbook Compatibility Issues – Older Excel versions do not support dynamic arrays, leading to errors.

How to Fix Spill Error in Excel

Below are various methods to resolve the spill error in Excel.

1. Check for Obstructing Data in Adjacent Cells

One of the most common causes of the spill error is data blocking the output range. To fix this:

• Click on the error message to see the blocked range.

• Clear any text, numbers, or formulas in the obstructing cells.

• Retry the formula to check if it now spills correctly.

2. Remove Merged Cells in the Spill Range

If your spill range includes merged cells, follow these steps:

• Select the entire spill range.

• Go to Home > Merge & Center > Unmerge Cells.

• Reapply your formula to check if the error is resolved.

3. Use Excel’s Spill Range Reference Operator (#)

If you are manually selecting a range that includes a spilled formula, Excel may trigger a spill error. Instead of manually specifying a range, use the spill range reference operator:

• Example: Instead of using A1:A10, use =A1# to refer to the entire spilled array.

4. Convert Spill Formula to Table Format

Dynamic arrays work better when structured in Excel Tables:

• Select the data range.

• Press Ctrl + T to convert it into a table.

• Apply your formula within the table to manage spill behavior effectively.

5. Check for Non-Empty Hidden Cells

Sometimes, hidden or formatted empty cells block the spill range:

• Select the range and delete hidden values using Clear Contents (Right-click > Clear Contents).

• Ensure no formatting affects the cells.

• Re-enter your formula.

6. Update to the Latest Excel Version

Older Excel versions (Excel 2016 and earlier) do not support dynamic arrays. If you're experiencing spill errors:

• Upgrade to Microsoft 365 or Excel 2019.

• Check if the formula works after updating.

7. Use Alternative Formulas for Compatibility

If your Excel version does not support dynamic arrays, consider using traditional array formulas:

• Instead of =FILTER(A2:A10, B2:B10>50), try using Ctrl + Shift + Enter after typing {=FILTER(A2:A10, B2:B10>50)}.

Preventing Future Spill Errors

To minimize future spill errors:

• Leave adequate empty space for formulas that return multiple values.

• Avoid merging cells in areas where you apply dynamic formulas.

• Regularly clear hidden or unwanted content in working areas.

• Use named ranges to manage formula spill areas effectively.

Conclusion

Spill errors in Excel can be frustrating, but they are easy to fix once you understand their causes. By clearing blocked cells, avoiding merged cells, using spill range references, and ensuring compatibility with Excel’s dynamic arrays, you can efficiently manage and resolve spill errors. Keep these tips in mind to ensure smooth data operations and better Excel efficiency!