Inventory Turnover Ratio and Trade Receivables Turnover Ratio

Inventory turnover ratio and trade receivables turnover ratio are both activity ratios. That means they do not only ask, “How much does the business have?” They ask a sharper question:

How efficiently is the business using what it has?

Inventory turnover ratio looks at how quickly goods are sold.

Trade receivables turnover ratio looks at how quickly credit sales are collected from customers.

Together, they tell a simple story. Goods should not sit in stock for too long, and money should not remain stuck with customers for too long.

Once this difference is clear, the formulas become much easier to remember.

Why These Ratios Matter

A business may show good sales but still face a cash problem.

Why?

Because sales and cash are not always the same thing.

If inventory is lying unsold, money is blocked in stock. If goods are sold on credit and customers take too long to pay, money is blocked in trade receivables.

These two ratios help you study that movement.

Ratio	What it studies	Simple question it answers
Inventory turnover ratio	Movement of inventory into sales	How fast is stock being sold?
Trade receivables turnover ratio	Collection from credit customers	How fast are customers paying?

Think of the business cycle like this:

Stage	What happens
Inventory	Goods are available for sale
Sale	Goods are sold to customers
Trade receivables	Credit customers owe money
Cash	Customers pay the business

Inventory turnover ratio studies the first movement. Trade receivables turnover ratio studies the later movement.

Inventory Turnover Ratio Meaning

Inventory turnover ratio shows how many times inventory is sold and replaced during a period.

If the ratio is 5 times, it means the average inventory has turned into cost of revenue 5 times during the year.

The usual formula is:

Formula	Meaning
Inventory Turnover Ratio = Cost of Revenue from Operations / Average Inventory	Shows how many times average inventory is sold during the year

In many questions, you may see the term “cost of goods sold” instead of “cost of revenue from operations”. For school-level Accountancy, the idea is usually the same.

This is the mistake that costs many students marks. Sales are usually bigger than cost, so using sales in the numerator can give a wrong ratio.

How to Calculate Cost of Revenue from Operations

Sometimes the question gives cost of revenue from operations directly. In that case, use it.

If it is not given, you may need to calculate it.

Situation	Calculation
Revenue from operations and gross profit are given	Cost of revenue from operations = Revenue from operations - Gross profit
Opening inventory, purchases, direct expenses, and closing inventory are given	Cost of revenue from operations = Opening inventory + purchases + direct expenses - closing inventory
Cost of revenue from operations is given directly	Use the given amount

If sales returns or purchase returns are given, adjust them carefully before calculating the final figure.

Average Inventory

The denominator of inventory turnover ratio is average inventory.

Formula	Meaning
Average Inventory = (Opening Inventory + Closing Inventory) / 2	Average stock held during the year

Write the formula properly as:

Particulars	Amount
Opening inventory	Rs. …
Add: Closing inventory	Rs. …
Total	Rs. …
Divide by 2	Average inventory

If opening inventory and closing inventory are both given, use both.

If only closing inventory is given and the question gives no opening figure, do not invent one. In many school questions, closing inventory may be used in place of average inventory only because no better information is available.

Inventory Turnover Ratio Interpretation

A high inventory turnover ratio generally means inventory is moving quickly. Goods are not lying unsold for a long time.

This can be a good sign because:

• stock is selling fast
• storage cost may be lower
• less money is blocked in inventory
• the business may be managing demand well

But a very high ratio is not always perfect. It may also mean the business is keeping too little stock and may run out of goods.

A low inventory turnover ratio generally means inventory is moving slowly.

This may suggest:

• overstocking
• weak demand
• outdated or slow-moving goods
• poor stock planning
• too much money blocked in inventory

A grocery shop and a furniture showroom cannot be judged with the same inventory speed. Some goods naturally move fast. Some goods take longer to sell.

Inventory Holding Period

Sometimes a question may ask for inventory holding period or inventory conversion period.

This tells you the average number of days inventory stays in the business before being sold.

Formula	Meaning
Inventory Holding Period = 365 / Inventory Turnover Ratio	Average number of days inventory remains in stock

If inventory turnover ratio is 5 times:

Calculation	Answer
365 / 5	73 days

This means inventory is held for about 73 days on average.

The turnover ratio and holding period move in opposite directions.

If inventory turnover ratio is higher	Inventory holding period is lower
If inventory turnover ratio is lower	Inventory holding period is higher

Trade Receivables Turnover Ratio Meaning

Trade receivables turnover ratio shows how quickly credit sales are converted into cash through collection from customers.

The formula is:

Formula	Meaning
Trade Receivables Turnover Ratio = Net Credit Revenue from Operations / Average Trade Receivables	Shows how many times trade receivables are collected during the year

Trade receivables usually include:

• debtors
• bills receivable

If both are given, include both.

In many questions, you may see “net credit sales” instead of “net credit revenue from operations”. The idea is the same: credit sales after returns and similar deductions.

If the question does not give cash sales separately and gives only revenue from operations, follow the information given in the question. Do not create a cash and credit split by assumption.

Average Trade Receivables

Average trade receivables are calculated like this:

Formula	Meaning
Average Trade Receivables = (Opening Trade Receivables + Closing Trade Receivables) / 2	Average amount due from credit customers during the year

If debtors and bills receivable are given separately, first combine them.

Particulars	Opening	Closing
Debtors	Rs. …	Rs. …
Bills receivable	Rs. …	Rs. …
Trade receivables	Rs. …	Rs. …

Then calculate the average.

Particulars	Amount
Opening trade receivables	Rs. …
Add: Closing trade receivables	Rs. …
Total	Rs. …
Divide by 2	Average trade receivables

Trade Receivables Turnover Ratio Interpretation

A high trade receivables turnover ratio generally means customers are paying quickly.

This can be a good sign because:

• credit collection is strong
• less money is blocked with customers
• cash flow is healthier
• the business may have a careful credit policy

But again, very high is not always perfect. If credit terms are too strict, the business may lose customers who need reasonable credit time.

A low trade receivables turnover ratio generally means collection is slow.

This may suggest:

• weak recovery from customers
• long credit period
• poor follow-up
• doubtful debts risk
• cash flow pressure

The ratio does not tell the whole story by itself. It must be read with credit policy, customer quality, and past performance.

Average Collection Period

Average collection period shows how many days the business takes to collect money from credit customers.

Formula	Meaning
Average Collection Period = 365 / Trade Receivables Turnover Ratio	Average number of days taken to collect from customers

If trade receivables turnover ratio is 6 times:

Calculation	Answer
365 / 6	About 61 days

The trade receivables turnover ratio and average collection period move in opposite directions.

If trade receivables turnover ratio is higher	Average collection period is lower
If trade receivables turnover ratio is lower	Average collection period is higher

The Key Difference Between the Two Ratios

These two ratios are often studied together because both are activity ratios. But they are not measuring the same thing.

Basis	Inventory Turnover Ratio	Trade Receivables Turnover Ratio
Main focus	Stock movement	Collection from credit customers
Numerator	Cost of revenue from operations	Net credit revenue from operations
Denominator	Average inventory	Average trade receivables
Unit	Times	Times
Related period	Inventory holding period	Average collection period
Main risk if ratio is low	Slow-moving stock	Slow collection from customers

The easiest way to remember the difference:

Inventory turnover is about goods leaving the business.

Trade receivables turnover is about money coming back into the business.

Solved Example

Let us calculate both ratios from one set of figures.

Particulars	Amount
Revenue from operations	Rs. 8,00,000
Gross profit	Rs. 2,00,000
Credit revenue from operations	Rs. 6,00,000
Opening inventory	Rs. 1,20,000
Closing inventory	Rs. 1,80,000
Opening debtors	Rs. 70,000
Opening bills receivable	Rs. 10,000
Closing debtors	Rs. 1,05,000
Closing bills receivable	Rs. 15,000

Step 1: Calculate Cost of Revenue from Operations

Particulars	Amount
Revenue from operations	Rs. 8,00,000
Less: Gross profit	Rs. 2,00,000
Cost of revenue from operations	Rs. 6,00,000

Step 2: Calculate Average Inventory

Particulars	Amount
Opening inventory	Rs. 1,20,000
Add: Closing inventory	Rs. 1,80,000
Total	Rs. 3,00,000
Average inventory	Rs. 1,50,000

Step 3: Calculate Inventory Turnover Ratio

Formula	Substitution	Answer
Cost of revenue from operations / Average inventory	Rs. 6,00,000 / Rs. 1,50,000	4 times

So, inventory turnover ratio is 4 times.

This means average inventory was sold 4 times during the year.

Step 4: Calculate Average Trade Receivables

First calculate opening and closing trade receivables.

Particulars	Opening	Closing
Debtors	Rs. 70,000	Rs. 1,05,000
Bills receivable	Rs. 10,000	Rs. 15,000
Trade receivables	Rs. 80,000	Rs. 1,20,000

Now calculate the average:

Particulars	Amount
Opening trade receivables	Rs. 80,000
Add: Closing trade receivables	Rs. 1,20,000
Total	Rs. 2,00,000
Average trade receivables	Rs. 1,00,000

Step 5: Calculate Trade Receivables Turnover Ratio

Formula	Substitution	Answer
Net credit revenue from operations / Average trade receivables	Rs. 6,00,000 / Rs. 1,00,000	6 times

So, trade receivables turnover ratio is 6 times.

This means trade receivables were collected 6 times during the year.

Step 6: Calculate the Related Periods

Period	Formula	Answer
Inventory holding period	365 / 4	About 91 days
Average collection period	365 / 6	About 61 days

The business takes about 91 days to sell inventory and about 61 days to collect from credit customers.

That is why these ratios should be studied together.

How to Read Both Ratios Together

One ratio alone can hide part of the picture.

Suppose inventory turnover ratio is high. That means goods are moving. But if trade receivables turnover ratio is low, the business is selling on credit and not collecting fast enough.

Suppose trade receivables turnover ratio is high. That means customers are paying quickly. But if inventory turnover ratio is low, the business may still have money blocked in unsold goods.

The healthiest situation is usually:

• inventory moves at a reasonable speed
• customers pay within a reasonable period
• stock levels are not dangerously low
• credit terms are not so strict that sales suffer

In real business, balance matters more than blindly chasing the highest ratio.

Common Mistakes to Avoid

Mistake 1: Using Sales in Inventory Turnover Ratio

Inventory turnover ratio uses cost of revenue from operations.

Do not use revenue from operations unless the question specifically expects it because no cost information is available.

Mistake 2: Forgetting Average Inventory

If opening inventory and closing inventory are both given, calculate average inventory.

Do not use only closing inventory when opening inventory is available.

Mistake 3: Ignoring Bills Receivable

Trade receivables include debtors and bills receivable.

If the question gives both, add both before calculating average trade receivables.

Mistake 4: Using Total Revenue When Credit Revenue Is Given

Trade receivables turnover ratio should use net credit revenue from operations.

If the question separately gives cash sales and credit sales, use credit sales.

Mistake 5: Writing the Ratio Without the Unit

Both ratios are written in times.

Write 4 times, not just 4.

For periods, write days.

Mistake 6: Giving a One-Sided Interpretation

High does not always mean good. Low does not always mean bad.

Always connect the ratio with business context.

Quick Revision Table

Point	Inventory Turnover Ratio	Trade Receivables Turnover Ratio
Formula	Cost of revenue from operations / Average inventory	Net credit revenue from operations / Average trade receivables
Denominator	Opening inventory plus closing inventory, divided by 2	Opening trade receivables plus closing trade receivables, divided by 2
Shows	Speed of selling stock	Speed of collecting from credit customers
Higher ratio generally means	Faster stock movement	Faster customer collection
Lower ratio may mean	Slow-moving or excess inventory	Slow recovery from customers
Related period	Inventory holding period	Average collection period
Period formula	365 / Inventory turnover ratio	365 / Trade receivables turnover ratio

How to Present the Answer in an Exam

Use a clean four-step format.

1. Write the formula.
2. Show the working note for average inventory or average trade receivables.
3. Substitute values clearly.
4. Write the answer with “times” and add interpretation if asked.

For example:

Step	What to write
Formula	Inventory Turnover Ratio = Cost of revenue from operations / Average inventory
Working note	Average inventory = (Opening inventory + Closing inventory) / 2
Substitution	Rs. 6,00,000 / Rs. 1,50,000
Answer	4 times

This format helps the teacher see your method, even if the question has many figures.

Frequently Asked Questions

1. What is inventory turnover ratio in simple words?

Inventory turnover ratio shows how many times average inventory is sold during a period. It tells whether stock is moving quickly or lying unsold for too long.

2. What is the formula for inventory turnover ratio?

The formula is cost of revenue from operations divided by average inventory.

Average inventory is usually opening inventory plus closing inventory, divided by 2.

3. Why do we use cost of revenue from operations instead of sales?

Inventory is recorded at cost, so it should be compared with cost. Sales include profit, which can make the inventory turnover ratio misleading.

4. What is trade receivables turnover ratio?

Trade receivables turnover ratio shows how many times trade receivables are collected during a period. It tells how efficiently the business collects money from credit customers.

5. What is included in trade receivables?

Trade receivables usually include debtors and bills receivable. If both are given in the question, add both.

6. Is a high trade receivables turnover ratio always good?

Not always. A high ratio usually means quick collection, which is good for cash flow. But if the business gives very strict credit terms, it may lose some customers.

7. What is the difference between trade receivables turnover ratio and average collection period?

Trade receivables turnover ratio is expressed in times. Average collection period is expressed in days. If the turnover ratio is high, the collection period is usually low.

8. Can inventory turnover ratio and trade receivables turnover ratio be compared directly?

No. They study different parts of the business cycle. Inventory turnover studies stock movement, while trade receivables turnover studies collection from customers.