> ## Documentation Index
> Fetch the complete documentation index at: https://docs-cbf.growthtak.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Calculating the GC

> Review and save the Grower Contract payment for a batch from the GC Calculation tab.

<Note>
  The **GC Calculation** tab on the batch dashboard needs the **Journal & GC** permission. It's normally an **admin** task at the end of a batch.
</Note>

Once a batch's birds are sold, open it and go to the **GC Calculation** tab. GrowTak pulls together the batch's actual performance and costs, applies the batch's [GC scheme](/lifting-gc/gc-schemes), and shows the payment due to the farmer.

<Frame caption="The GC Calculation tab — performance, cost breakdown, and the GC worksheet.">
  <img src="https://mintcdn.com/devharish/Guknf5aI_f54kcia/images/guide/06-lifting-gc/batch-tab-gc-calculation.png?fit=max&auto=format&n=Guknf5aI_f54kcia&q=85&s=47cabb44f09c41d553465db1bba83964" alt="GC calculation tab" width="1425" height="1197" data-path="images/guide/06-lifting-gc/batch-tab-gc-calculation.png" />
</Frame>

## What the tab shows

**Batch Summary & Performance** — the final figures for the flock: chicks placed, mortality and %, birds sold, total/average weight, consumed feed, FCR, CFCR, liquidation dates, mean age, and livability.

**Farm Cost Details** — the cost build-up: chick cost, feed cost, medicine cost, admin cost, optional additional adjustments, and the resulting **production cost** (total and per kg). Scheme rate and actual total are shown side by side.

**GC Calculation** — the worksheet itself:

* A **parameters** block comparing **Std.**, **Actual**, and **Diff.** for production cost/kg, FCR, mortality %, and GC/bird.
* A **component breakdown** — each line of the payment (base rate, incentives, bonus, TDS, loading charge, and any batch-specific components), with its amount.
* **Total GC Payable** — the bottom line.
* **Payment Deduction (Loan Repayment)** — optionally deduct an amount that the farmer owes; this records a repayment against their loan.
* **Remaining Loan Outstanding** — what's still owed after the deduction.

## Live preview (Advanced schemes)

For Advanced-mode schemes, a **Live Preview** recalculates the worksheet as data changes, so you can see the result before committing. You can also **Add Batch Component** — a one-off formula component that applies to *this batch only* (for an ad-hoc adjustment) without changing the shared scheme.

## Saving the GC

<Steps>
  <Step title="Review the figures">
    Check the performance, costs, and each component line.
  </Step>

  <Step title="Set any loan deduction">
    If the farmer has an outstanding loan, enter the amount to recover in **Payment Deduction**.
  </Step>

  <Step title="Save GC">
    Press **Save GC**. GrowTak stores the calculation against the batch, and — if you set a deduction — records a loan **repayment** automatically.
  </Step>
</Steps>

After saving, the batch's GC has a **paid status** of **Unpaid**. Recording the actual payment (or marking it paid from the [GC Paid report](/reports/gc-reports)) flips it to **Paid**. See [Payments & loans](/lifting-gc/payments).

## Changing a saved GC

You can **delete** a saved GC to recalculate — for example after correcting a transaction or day entry. Deleting it also reverses the loan repayment it created and re-opens the batch for GC editing.

<Warning>
  GC figures depend on **complete, accurate data** — all bird sales recorded, day entries finalised, and feeder leftover entered. Finish data entry before saving the GC.
</Warning>

<Tip>
  The GC at closing uses the **Final FCR** (based on total recorded feed), which can differ slightly from the **Running FCR** shown in the live reports during the cycle. This is expected — see [Key concepts](/introduction/key-concepts).
</Tip>