I tried every budgeting app out there. Some were decent. Most were either too complicated, too expensive, or required connecting my bank account to yet another third party service I did not fully trust. That is when I decided to use AI to track monthly expenses instead, and it changed how I manage my money completely.
What I ended up with was simpler than any app: a spreadsheet and an AI assistant. It takes about 20 minutes to set up and maybe 15 minutes per month to maintain. It has saved me more money than any dedicated budgeting app I ever paid for, because I actually use it.
Here is exactly how I do it.
Why a spreadsheet with AI beats most budgeting apps
Before I get into the how, let me explain why this approach works better for me than dedicated apps.
Most budgeting apps are either too rigid or too complex. They want you to fit your spending into their categories, their workflows, their interface. If your financial situation does not match their assumptions, you end up fighting the tool instead of using it.
A spreadsheet is completely flexible. You set it up the way your finances actually work. And when you combine it with AI, you get the analysis and insight that used to require expensive software or a financial advisor, completely free.
The other big advantage is privacy. Your spreadsheet lives on your device. No bank connections, no third party data sharing, no subscription required. This is exactly why I chose to use AI to track monthly expenses rather than paying for another app that would not stick.
What you need to get started to use AI to track monthly expenses
Nothing fancy. Just these three things:
A spreadsheet app. Google Sheets is free and works in any browser. Excel works too if you already have it. Either one is fine.
An AI assistant. Claude or ChatGPT, both free. I use Claude for most of the analysis work because it handles nuanced financial questions better, but ChatGPT works just as well for this purpose.
Your bank statements. Most banks let you download your transactions as a CSV file. This is the raw data you will work with each month.
Step 1: Set up your expense tracking spreadsheet
Create a simple spreadsheet with these columns:
- Date
- Description
- Amount
- Category
- Notes
That is it. Do not overthink it. The simpler the structure, the more likely you are to actually keep it updated.
For categories, use whatever makes sense for your life. Mine are: Housing, Food, Transport, Subscriptions, Business, Personal, and Savings. Adjust to fit your situation.
Step 2: Import your transactions
Download your bank statement as a CSV file. Most banks have this option under statements or transaction history. If yours does not, you can manually enter transactions, though that takes longer.
Paste the transactions into your spreadsheet. At this point it will look messy. Transaction descriptions from banks are often cryptic abbreviations that do not tell you much. That is where AI comes in.
Step 3: Use AI to clean and categorize your data
This is where the process gets genuinely useful. Copy your list of transactions and paste them into Claude or ChatGPT with this prompt:
“Here are my bank transactions for the month. Please categorize each one into these categories: Housing, Food, Transport, Subscriptions, Business, Personal, Savings. Return the results as a simple list with the original description, amount, and category.”
The AI will go through every transaction and assign a category. It is not perfect but it gets about 90% of them right on the first pass. You just need to review and correct the obvious mistakes, which takes a few minutes.
This single step used to take me 45 minutes to an hour every month. Now it takes about five minutes. This is the core of how I use AI to track monthly expenses without any paid software.
Step 4: Ask AI to analyze your spending
Once your transactions are categorized, paste the summary back into your AI assistant and ask it to analyze your spending. Here are the prompts I use every month:
“Based on this spending breakdown, what are my three biggest areas of overspending compared to a typical budget for someone with this income level?”
“Which of my subscriptions appear to be duplicates or overlap in functionality?”
“If I wanted to save an extra $200 next month, where would you recommend I cut first and why?”
The answers are not always comfortable. But they are honest, specific, and based on your actual numbers rather than generic advice. This is the analysis step that makes using AI to track monthly expenses worth it every single month.
Step 5: Set next month’s targets
Based on the AI analysis, I set simple targets for the following month. Not a complicated budget with 30 categories. Just three or four specific numbers I want to hit.
For example: food delivery under $100, subscriptions under $80, personal spending under $150.
I add these as a simple summary row at the top of the spreadsheet. At the end of next month I can see exactly how I did against my own targets.
What this process actually found for me
The first time I ran my transactions through this process, the AI flagged something I had completely missed. I was paying for two services that did almost exactly the same thing. One was a tool I had signed up for during a promotion and forgotten about. Together they were costing me $34 a month.
I cancelled one immediately. That is $408 a year back in my pocket from one 20 minute exercise.
It also pointed out that my food delivery spending had crept up significantly over three months without me noticing. Seeing the actual number written out clearly was what finally made me address it.
The honest limitations
One thing worth knowing before you commit to this approach: when you use AI to track monthly expenses this way, it is not fully automated. You need to download your statements, paste them into AI, and review the output each month. If you want something that runs entirely in the background without any effort, a dedicated app like Cleo is better for that.
This approach also works best if you are comfortable with spreadsheets at a basic level. You do not need to know formulas or anything advanced. But you need to be willing to maintain it.
For me the trade-off is worth it. Full control, no subscription cost, no third party access to my bank account, and genuinely useful AI analysis every month.
Getting started this weekend
If you want to try this and get started to use ai to track monthly expenses, here is the simplest possible version to start with:
- Download last month’s bank statement as a CSV
- Open Google Sheets and paste the transactions in
- Open Claude or ChatGPT and paste the transactions with the categorization prompt above
- Copy the results back into your spreadsheet
- Ask the AI what surprises it notices in your spending
The whole thing takes less than an hour the first time. After that, 15 minutes per month is enough to keep it running.
Do you already use AI to track monthly expenses? Have a different approach that works for you? Drop it in the comments below. I read everything.