Formula and Range Protection for mortgage installments

Range Protection and Consistency Check for mortgage installments

Theme: Mortgage Installment Simulator and TrackerFeature: Protection and AccessLevel: Intermediate

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Formula columns and the Master sheet are protected from accidental deletion. Helper formulas flag cells whose formulas were overwritten.

Formula and Range Protection for mortgage installments: preview of the workbook

Project info

ThemeMortgage Installment Simulator and Tracker
FeatureProtection and Access · Intermediate
ToolGoogle Sheets
Price (one price)US$16

Functions used

Protect range
ISFORMULA
IF
AND

Formula structure stays safe and edit mistakes are easy to spot.

The project file you can download

The real project file is available. It is not just the picture above: you get the working file with every formula in place. It can be downloaded after payment, and we send the download link by WhatsApp or email.

.xlsx workbook (.xlsx)

What is inside the file

A Excel (.xlsx) file that opens straight in Google Sheets workbook with Data, Master, Summary and Dashboard sheets
Ready-made formulas you can point at your own data
A Guide sheet with usage steps, formula explanations and tips

Project file: The actual project file (not just the picture) is available to download once payment is complete; we send the download link by WhatsApp or email
Payment: One price per project, paid in full upfront; the file is sent once payment is received
Tax: Prices exclude 11% VAT
Customisation: Adapting it to your own data or format can be ordered separately via WhatsApp

Formulas in the file

Cell	Formula	What it does
H2	`=IF(ISFORMULA(G2),"Terkunci","Rumus hilang")`	Check G still holds a formula.
I2	`=IF(G2=D2*E2,"Konsisten","Diubah manual")`	Check total matches qty x price.
J2	`=IF(AND(D2>0,E2>0),"Valid","Periksa")`	Check qty and price are positive.
G11	`=COUNTIF(Data!H:H,"Rumus hilang")`	Count of lost formulas.

How to use it

1Right-click column G, Protect range, then Set permissions.
2Restrict editors: only you, or show a warning.
3Protect the Master sheet with Protect sheet.
4See the check formulas in columns H to J of the Data sheet.
5Watch the lost formulas count in Rekap!G11.

Sample content

Columns of the Data sheet:

Mortgage Component
Category
Months
Amount
Status
Date

Master sheet items

Mortgage Component	Amount
Monthly Principal	2,100,000
Monthly Interest	1,450,000
Down Payment	75,000,000
Bank Provision Fee	3,500,000
Notary Fee	6,000,000
Property Transfer Tax	9,000,000
Mortgage Life Insurance	2,500,000
Fire Insurance	900,000
Partial Prepayment	10,000,000
Late Fee	150,000

Dashboard: Mortgage Dashboard

Total Installments Paid
Total Interest
Remaining Principal
Months Remaining

Tips

Enter the tenor and rate from your loan contract
Log each payment so remaining principal stays accurate
Simulate prepayments to save on interest

The sample data is synthetic.

Price and ordering

US$16

One price for the whole project file, excl. 11% VAT

Order the file via WhatsApp

Frequently asked questions

Do I get the real file?

Yes. The picture above is only a preview. After payment we send the download link of the real project file (an .xlsx workbook) by WhatsApp or email.

Is the data in the file real?

No. The sample data is synthetic and only shows how the formulas behave. Replace it with your own data and the formulas keep working.

Can you adapt it to my data?

Yes, as a separate order. Message us on WhatsApp with a short description of your columns and what you want to see.

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Sample data is synthetic. Google Sheets is a trademark of Google LLC.

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Formula and Range Protection for mortgage installments