Average Monthly Bank Balance (AMB) Calculator
Calculate true Average Daily Balance (ADB/AMB) across calendar days by carrying forward non-transaction balances.
Click or drag & drop bank statement CSV or Excel (.xlsx)
Supports files up to 30MB with Date, Description, Debit, Credit, and Balance columns
Analyzing transactions with institutional-grade precision...
Calculation & Analysis Results
Execution completed successfully
Calculation Methodology & Formula
Average Daily Balance = (Sum of End-of-Day Closing Balances for every calendar day in month) ÷ Total Days in Month (30/31).
Arithmetic is calculated using institutional-grade fixed-point precision with exact 2-decimal financial rounding. Standard binary floating-point drift is strictly prevented across all transaction volumes.
Supported Inputs & Limitations
Supported: Upload dated statement transactions or enter daily closing balances.
Limitations: Accurate ADB requires daily closing balance continuity. Merely averaging transaction rows will produce an invalid number.
Generate Daily Balance History from Bank PDFs
Trade Cost Pro extracts daily closing balance sequences from scanned or digital PDFs and plots full multi-month AMB graphs.
Frequently Asked Questions
Why is Average Daily Balance different from the average of transactions?
Banks and credit underwriters calculate interest and minimum balance based on the balance at midnight of every calendar day. If a balance stays at ₹1,00,000 for 25 days with no activity, it must be weighted for all 25 days.
How are weekends and bank holidays treated?
The closing balance of the preceding business day is carried forward across Saturday, Sunday, and holidays.
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