A yes PWC :-) That is what I would expect :-))

I just hope the divine powers of Luca Pacioli might help you, before is too late. A whole set of accounting bodies and real world disasters expressly advise against its use and spreadsheets in general.

You even have dedicated pages...

https://en.wikipedia.org/wiki/List_of_spreadsheet_mistakes

EuSPRIG Horror Stories - Spreadsheet mistakes

https://eusprig.org/research-info/horror-stories/

For example the (ICAEW) UK chartered accountants explicitly warn auditors. And research has shown that around 94% in these contexts contain errors:

"Errors in Operational Spreadsheets" - https://faculty.tuck.dartmouth.edu/images/uploads/faculty/se...

Also... Excel does not use exact decimal arithmetic. It stores numbers in IEEE-754 binary floating point, which cannot precisely represent many decimal values used in accounting. Microsoft documents this explicitly:

https://learn.microsoft.com/en-us/office/troubleshoot/excel/...

It also only preserves 15 significant digits and silently zeroes anything beyond that:

https://support.microsoft.com/en-us/office/excel-specificati...

So this means:

– decimal values are approximated

– rounding errors accumulate

– large financial values lose precision

– results depend on formula structure and rounding order

That alone disqualifies it as Accounting ledger. Historically you have lots of famous examples of bad outcomes of treating Excel as financial infrastructure...

The JPMorgan London Whale - $6B loss A flawed Excel risk model and copy paste errors understated risk and helped produce multi-billion losses. https://en.wikipedia.org/wiki/2012_JPMorgan_Chase_trading_lo...

TransAlta energy trading — $24M loss Simple spreadsheet row misalignment in bidding model cost aprox 10% of the company profit. https://www.lumeer.io/spreadsheet-for-project-management/

Fannie Mae - $1.3B reporting error wrong spreadsheet formula caused more than $1B accounting misstatement. https://www.theguardian.com/technology/2024/oct/28/microsoft... https://archive.is/w1cjj

Fidelity Magellan — $2.6B error Missing minus sign in a spreadsheet overstated capital gains by billions. https://en.wikipedia.org/wiki/List_of_spreadsheet_mistakes

Large audit firms also publish entire risk frameworks, ( and I am sure PWC does also...) explaining why uncontrolled spreadsheets are a major source of financial misstatement in the first place.

Advancing finance with Claude Opus 4.6