Calculator
Plotly graph
The chart compares reserve amounts or ratios from your selected mode.
Example data table
| Branch | Demand Deposits | Time Deposits | Deductions | Exemptions | Eligible Reserves | Target CRR |
|---|---|---|---|---|---|---|
| North Desk | 1,250,000 | 2,100,000 | 150,000 | 50,000 | 155,000 | 4.50% |
| Central Desk | 2,400,000 | 3,600,000 | 220,000 | 80,000 | 290,000 | 4.50% |
| South Desk | 980,000 | 1,420,000 | 90,000 | 25,000 | 112,500 | 4.50% |
Formula used
Deposit Base = Demand Deposits + Time Deposits − Allowed Deductions − Exempt Liabilities
Eligible Reserves = Vault Cash + Central Bank Balance + Other Eligible Reserves
Required Reserve = Deposit Base × (Target CRR ÷ 100)
Operating Target Reserve = Deposit Base × ((Target CRR + Internal Buffer) ÷ 100)
Implied CRR = (Eligible Reserves ÷ Deposit Base) × 100
Maximum Supported Deposit Base = Eligible Reserves ÷ ((Target CRR + Internal Buffer) ÷ 100)
Additional Reserve Needed = max(0, Operating Target Reserve − Eligible Reserves)
How to use this calculator
- Select the calculation mode that matches your reserve task.
- Enter deposits, deductions, and exemptions, or provide a manual deposit base.
- Enter reserve balances such as vault cash and central bank balances.
- Type the target cash reserve ratio and any internal planning buffer.
- Add a projected growth rate or projected base for forward planning.
- Press Calculate to show results above the form.
- Use the CSV and PDF buttons to export the current calculation summary.
Frequently asked questions
1) What does the cash reserve ratio measure?
It measures how much eligible cash a bank or unit must hold against its deposit base. The ratio helps control liquidity, compliance, and lending capacity.
2) Why does this calculator ask for deductions and exemptions?
Some reserve frameworks allow liabilities to be reduced by eligible deductions or excluded items. These adjustments create a more accurate reserve base before applying the target ratio.
3) What is the difference between required reserve and operating target reserve?
Required reserve is the statutory minimum. Operating target reserve adds an internal buffer, which helps manage volatility, timing gaps, and compliance risk during daily cash movements.
4) What does implied CRR mean?
Implied CRR shows the reserve ratio already supported by your current eligible reserves. It is useful when you know reserves and deposits but want to infer the effective reserve coverage.
5) How is additional deposit capacity calculated?
The calculator divides eligible reserves by the operating ratio, then subtracts the current deposit base. The remainder estimates how much more deposits could be supported.
6) Should I use a manual deposit base override?
Use it when you already know the exact reserve base from another report or regulatory statement. Otherwise, let the calculator derive the base from deposit and deduction fields.
7) Can this tool help with planning future reserve needs?
Yes. Enter a projected growth rate or target deposit base to estimate future required reserves, operating targets, and any additional reserve funding needed.
8) Is a higher cash reserve ratio always better?
Not always. Higher reserves improve liquidity and compliance comfort, but they may reduce deployable funds. The right level depends on regulation, internal policy, and cash-flow risk.