Example input
Please give me the code to automatize the calculus of everything linked to a loan: monthly repayments, capital remaining, etc.
Example output
Sure, I can help you with that. To automate the calculations related to a loan, we can create a VBA macro in Excel. Here's an example code that calculates monthly repayments and tracks the capital remaining over time:
vba
Sub LoanCalculator()
Dim LoanAmount As Double
Dim InterestRate As Double
Dim LoanTerm As Integer
Dim MonthlyPayment As Double
Dim RemainingBalance As Double
Dim InterestPayment As Double
Dim PrincipalPayment As Double
' Input loan details
LoanAmount = InputBox("Enter the loan amount:")
InterestRate = InputBox("Enter the interest rate (in percentage):")
LoanTerm = InputBox("Enter the loan term (in months):")
' Convert interest rate to monthly decimal rate
InterestRate = InterestRate / 100 / 12
' Calculate monthly payment
MonthlyPayment = LoanAmount * InterestRate * (1 + InterestRate) ^ LoanTerm / ((1 + InterestRate) ^ LoanTerm - 1)
' Output monthly payment
MsgBox "Monthly Payment: $" & Format(MonthlyPayment, "0.00")
' Initialize remaining balance
RemainingBalance = LoanAmount
' Clear previous data (if any) and set up table headers
Sheets("Loan Details").Range("A1:F1").Value = Array("Payment", "Monthly Payment", "Interest Payment", "Principal Payment", "Remaining Balance", "Total Interest Paid")
' Loop through each payment period
For Payment = 1 To LoanTerm
' Calculate interest payment
InterestPayment = RemainingBalance * InterestRate
' Calculate principal payment
PrincipalPayment = MonthlyPayment - InterestPayment
' Update remaining balance
RemainingBalance = RemainingBalance - PrincipalPayment
' Output data to the worksheet
Sheets("Loan Details").Cells(Payment + 1, 1).Value = Payment
Sheets("Loan Details").Cells(Payment + 1, 2).Value = MonthlyPayment
Sheets("Loan Details").Cells(Payment + 1, 3).Value = InterestPayment
Sheets("Loan Details").Cells(Payment + 1, 4).Value = PrincipalPayment
Sheets("Loan Details").Cells(Payment + 1, 5).Value = RemainingBalance
Sheets("Loan Details").Cells(Payment + 1, 6).Value = WorksheetFunction.Sum(Sheets("Loan Details").Range("C2:C" & Payment + 1))
Next Payment
MsgBox "Loan details calculated and displayed on the 'Loan Details' worksheet."
End Sub
To use this code, follow these steps:
Open Excel and press Alt + F11 to open the Visual Basic for Applications (VBA) editor.
Insert a new module by clicking on "Insert" -> "Module" in the VBA editor.
Copy and paste the above code into the module.
Save the workbook as a macro-enabled (.xlsm) file.
Close the VBA editor.
Run the macro by pressing Alt + F8, selecting "LoanCalculator," and clicking "Run."
You will be prompted to enter the loan amount, interest rate, and loan term. After providing the inputs, the macro will calculate the monthly payment and generate a table on a worksheet named "Loan Details" that shows the payment schedule, interest payment, principal payment, remaining balance, and total interest paid over time.
Let me know if you have any questions or need further assistance.