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Penahak

Opening stock

Opening stock records what you already hold on the day you start. Enter each product's quantity, rate and warehouse once, dated the opening entry date. It starts the balance and the first layer of cost, and posts nothing to the ledgers.

  • Accounting Product tools
  • 6 min read
  • Updated October 20, 2026

For Store keeper Accountant Administrator

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What opening stock is

On the day you start using Penahak you already hold goods. Product Opening puts them on the books: for each product, the warehouse, the quantity and the rate (what one unit cost). Each line becomes a stock entry that comes in on the opening date, so the balance starts right and the first layer of cost is your rate (How stock is valued and what a sale costs).

Opening stock is a stock entry only. It posts nothing to the ledgers: the value shows up in the reports through closing stock (Closing stock in the profit and loss, the balance sheet and the year end). Your ledger balances are entered separately (Enter ledger opening balances).

Enter opening stock

  1. Open Product Opening and choose Add
    Who
    Store keeper or accountant
    Where
    Product Opening (opening entries) > Add
    What changes
    The Voucher no shows NEW: the number is given when you save. It needs a numbering series for product openings (Document numbering for sales).
  2. Check the date
    What changes
    Date starts at the opening entry date of the fiscal year (The fiscal year). Keep it: it is the day before the first fiscal year.
  3. Add a line for each product and warehouse
    What changes
    Choose the Product, Warehouse and, if you use them, the Project/Business Unit; enter QTY, Alt QTY (when the product has an alt unit) and Rate. Amount and Net amount are worked out. Products that need them ask for Serial no details or batch details.
    Needs
    QTY above zero. A product with an alt unit also needs its alt quantity.
  4. Save
    What changes
    "Product Opening saved successfully." The goods are in the warehouse.

You can also fill many lines from a spreadsheet: Template, Import, Upload.

What happens when you save an opening
AreaChange
StockEach line's quantity comes into its warehouse on the opening date
Stock valueEach line starts the first pile of cost at its Rate (How stock is valued and what a sale costs)
LedgersNothing. Ledger balances are entered in the ledger openings (Enter ledger opening balances)
Profit and lossIn the first year, the openings dated before the year starts make the opening stock of the profit and loss; the same goods, if still held, are part of its closing stock (Closing stock in the profit and loss, the balance sheet and the year end)
NumberThe next number of the product opening series

Rules

You seeMeaning
Quantity must be greater than zero.A line has no quantity
This product already exist on product opening listYou added the same product twice in this voucher
Opening records of the following product has already been entered.An opening for that product, warehouse, project and branch exists. Edit that one instead
Please enter batch details for this product. / Please give product serial no details to proceed ahead.A batch-wise or serial-number product needs them
You have set alt unit for this product so please provide alt quantity for this product.The product has an alt unit

Only one opening per product, warehouse, project and branch is allowed. To change the quantity, Edit the opening. Later corrections are made with a Stock adjustment (Adjust stock: counts, damage, expiry and write-offs).

When you add a product

The Opening info tab of a new product (Warehouse, Stock qty, Stock rate) writes an opening in the same way, dated the opening entry date. It needs a product-opening numbering series that covers today, and it cannot be used to change the opening of a product that already exists.

Common questions

I entered the opening twice for the same product and warehouse.

Penahak refuses a second opening for the same product, warehouse, project and branch ("Opening records of the following product has already been entered."). Edit the first one.

The opening is in stock but not on the balance sheet.

Opening stock posts no ledger entry. The balance sheet shows stock when you tick Include closing stock (Closing stock in the profit and loss, the balance sheet and the year end).

Can I correct an opening after sales have been made?

Edit the opening while its year is open; the cost of the sales made from it is worked out again when the value reports run. After the year is closed, use a Stock adjustment (Adjust stock: counts, damage, expiry and write-offs).

Can I delete an opening?

Yes, from its list. Penahak does not check whether the goods are still there: deleting it after the goods were sold leaves the warehouse below zero (Negative stock: where Penahak checks it).

Our opening came from the previous software in another unit.

Enter the quantity in the product's unit (and its alt quantity when it has one) (Units and alternative units).

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