SubjectsEntrepreneurship in PlasticsLesson 01 · Working Capital Banking: Cash Credit (CC), LC & Bill Discounting
BusinessLesson 0119 PPE Syllabus Aligned

Working Capital Banking: Cash Credit (CC), LC & Bill Discounting

Working capital management for plastics processors, Cash Credit (CC) limits, Tandon/Nayak committee assessment, Letter of Credit (LC), and bill discounting.

~35 min technical deep-dive·Standard Indian Curricula (CIPET / Anna Univ / ICT)

01 · Why This Matters in Industry & GATE XE-F

Applied directly across petrochemical refining, compounding plants, mold-flow simulations, and automotive part manufacturing (e.g., Reliance Industries, Supreme Petrochem, IOCL, CIPET testing protocols).

1

Molecular Mechanism: Master conformational physics, transition temperatures, and reaction kinetics.

2

Process & Quality: Predict viscosity behavior, solve molding defects, and apply ASTM/ISO testing standards.

02 · Technical Theory & Governing Equations

Working Capital Banking: Cash Credit (CC), LC & Bill Discounting

Project management and raw materials budgeting - Visual reference for Working Capital Banking: Cash Credit (CC), LC & Bill Discounting
Project management and raw materials budgeting - Visual reference for Working Capital Banking: Cash Credit (CC), LC & Bill Discounting

1. Why This Topic Matters

Even a highly profitable plastics manufacturing plant can fail if it runs out of cash. In India, plastics processors must purchase raw materials (polymer granules) on cash terms or tight schedules, while supplying finished products to large FMCG/retail clients on 30- to 90-day credit terms. This mismatch creates a gap that must be financed through bank working capital facilities. Understanding trade finance instruments (Cash Credit, Letters of Credit, Bill Discounting) is essential for entrepreneurs to maintain liquidity.

2. Learning Objectives

  • Formulate working capital cycles and calculate the net operating cycle (in days).
  • Contrast bank credit facilities: Cash Credit (CC), Letters of Credit (LC), and Bill Discounting.
  • Size drawing power (DP) limits against paid stock and receivables.
  • Solve interest cost and discounting charge calculations.
  • Reference Indian banking guidelines on working capital financing (Tandon Committee rules).

3. Core Theory

3.1 The Net Operating Cycle

The net operating cycle measures the duration between cash paid for raw materials and cash received from sales:

Net Operating Cycle (Days)=Stock Days+Debtor DaysCreditor Days\text{Net Operating Cycle (Days)} = \text{Stock Days} + \text{Debtor Days} - \text{Creditor Days}

3.2 Key Bank Trade Finance Instruments

  • Cash Credit (CC): Running bank account facility where borrowers can withdraw up to a designated credit limit. The actual withdrawal limit is governed by the Drawing Power (DP), calculated monthly based on inventory value and debtors, minus creditors, applying margins (typically 25% on stock, 30–40% on debtors).
  • Letter of Credit (LC): Payment guarantee issued by the buyer's bank to the seller, ensuring payment upon presentation of shipping documents. Essential for purchasing raw polymer batches from major suppliers like Reliance or IOCL.
  • Bill Discounting: The bank purchases unpaid trade invoices (bills of exchange) from the manufacturer at a discount (minus interest fees), providing immediate cash flow.

4. Worked Example

Problem: A plastic processor submits their monthly stock statement to their bank to determine their Drawing Power (DP) under a Cash Credit limit of ₹1.50 Crore. The stock statement details are:

  • Value of raw polymer stock + finished goods = ₹80,00,000.
  • Sundry creditors (unpaid stock) = ₹20,00,000.
  • Sundry debtors (receivables <90< 90 days old) = ₹60,00,000. The bank applies a margin of 25%25\% on inventory (net of creditors) and 40%40\% on debtors. Calculate the available Drawing Power.

Solution:

  1. Calculate Net Eligible Inventory:
Net Stock=InventoryCreditors=80,00,00020,00,000=₹60,00,000\text{Net Stock} = \text{Inventory} - \text{Creditors} = 80,00,000 - 20,00,000 = \text{₹60,00,000}
  1. Apply margins to calculate Drawing Power (DP):
  • DP from Stock: Net Stock×(10.25)=60,00,000×0.75=₹45,00,000\text{Net Stock} \times (1 - 0.25) = 60,00,000 \times 0.75 = \text{₹45,00,000}
  • DP from Debtors: Debtors×(10.40)=60,00,000×0.60=₹36,00,000\text{Debtors} \times (1 - 0.40) = 60,00,000 \times 0.60 = \text{₹36,00,000}
  • Total Drawing Power = DP from Stock+DP from Debtors=45,00,000+36,00,000=₹81,00,000\text{DP from Stock} + \text{DP from Debtors} = 45,00,000 + 36,00,000 = \textbf{₹81,00,000}

Interpretation: The bank will allow the processor to draw up to ₹81,00,000 from their Cash Credit account this month, despite their nominal sanction limit being ₹1.50 Crore. Managing paid inventory levels is critical to maximize drawing power.

5. Indian Industry Context

Indian polymer distributors (e.g., selling Reliance PP grades) demand Letters of Credit (LC) from small processors before dispatching raw materials. Small processors negotiate LC-Usance (e.g., 90 days) with their banks to get raw materials, convert them to products, and collect payments before the LC matures.

6. Key Takeaways & Glossary

  • Drawing Power: The actual amount an entrepreneur can withdraw from their CC account based on current assets.
  • Letter of Credit (LC): Financial instrument guaranteeing payment to a seller from the buyer's bank.
  • Bill Discounting: Immediate funding secured by selling accounts receivable invoices to a bank.
  • Creditor Days: Days of credit extended by suppliers for raw material purchases.
  • Tandon Committee: Historical RBI committee establishing working capital lending norms.

7. Standards Reference

  1. Reserve Bank of India (RBI) master circular on working capital credit facilities
  2. Uniform Customs and Practice for Document Credits (UCP 600) for international LCs

8. Practice Questions

  1. Explain the difference between Fund-Based (Cash Credit, Term Loans) and Non-Fund-Based (Letters of Credit, Bank Guarantees) credit facilities.
  2. Why do banks exclude debtors older than 90 days from the Drawing Power calculation? Discuss debtor aging schedules.
  3. A factory has 45 stock days, 60 debtor days, and 30 creditor days. Calculate the operating cycle and discuss working capital needs.

9. Quiz

Q1. The bank credit limit that is calculated monthly based on inventory and debtor balances minus margins is called:

  • C) Drawing Power (DP)

Q2. Which trade finance instrument acts as a payment guarantee from the buyer's bank to the raw material seller?

  • B) Letter of Credit (LC)

Q3. If a factory has stock days of 30, debtor days of 45, and creditor days of 25, what is the net operating cycle?

  • B) 50 days

Q4. What is the standard margin applied by banks on eligible debtors in working capital financing?

  • B) 30% to 40%

Q5. Which trade finance method provides immediate cash flow by selling accounts receivable invoices to a bank?

  • B) Bill Discounting

Working Capital Banking: Cash Credit (CC), LC & Bill Discounting · Engineering Triad

Material Synthesis · Processing Hardware · Commercial Application

ASTM / ISO Aligned
1. MaterialResin / Chemistry

Standard Engineering Thermoplastic Resin

—[Monomer Backbone]ₙ— (Calibrated Molecular Weight & PDI)

Specific Gravity:1.05–1.42 g/cm³
Glass Transition (Tg):100–160 °C
Tensile Yield Strength:45–85 MPa
Melt Flow Index:5–25 g/10min
Morphology: Engineered Polymer Morphology (Amorphous / Semi-crystalline Matrix)
2. Machine & MouldShop Floor

Industrial Polymer Processing & Tooling System

Computer-Controlled Extrusion / Injection Moulding Hardware

Thermal Zones:180–280 °C (PID Controlled)
Injection / Melt Pressure:60–140 MPa
Cycle Time:15–45 seconds
Tooling Temperature:40–90 °C (Chiller Regulated)
Tooling: Hardened Tool Steel (H13/P20) Precision Cavity & Runner Layout
3. Real ProductApplication

Commercial Engineering Parts & Quality-Inspected Components

Automotive, Electrical, Medical & Packaging Applications

Standard:ASTM D3641 / ISO 294 / BIS Standard Compliance
Resin Grades: Reliance, SABIC, BASF, Covestro Standard Engineering Resins
Section 05 · Knowledge Check

Test Your Conceptual Understanding

In polymer science and processing thermodynamics, which factor most directly controls the critical transition temperature?

Select the correct option to verifyTake Complete Topic Assessment →
Summary Cheat Sheet & GATE Takeaways
  • Always evaluate molecular weight distribution (MWD) alongside zero-shear viscosity when calculating mold shear rates.
  • Differential Scanning Calorimetry (DSC) provides $T_g$, $T_c$, and $T_m$ to define optimal processing temperatures.
  • Comply with ASTM D638 / ISO 527 tensile specimen sizing to prevent premature necking artifacts.
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