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Financial Management · Management of inventories, accounts receivable, accounts payable and cash

Accounts Payable Management for ACCA FM

Updated 11 October 2026 · Fact-checked

Accounts payable management means using supplier credit as cheap short-term finance without damaging supplier relationships. In FM you compare the annualised cost of forgoing an early settlement discount with your cost of short-term finance. If the discount's annual cost is higher, take the discount and pay early.

Understand Accounts Payable Management

Trade credit is the time a supplier gives you to pay after delivery. While you hold the goods but have not paid, the supplier is financing you. For many firms trade payables are the largest source of short-term finance. It needs no application, no security and no arrangement fee.

Trade credit is not always free. Suppliers often offer a settlement discount for paying early. For example, 2% off if you pay within 10 days, otherwise the full amount in 30 days. If you skip the discount, you pay more in return for the extra days of credit. That extra amount is an interest cost.

The cost looks small as a percentage, but the extra credit period is short, so the annualised rate is high. A 2% discount for paying 20 days earlier works out at about 44.6% a year compound (about 37% on a simple basis). Compare this with your overdraft or loan rate. If borrowing is cheaper than the annualised cost, borrow, pay early and take the discount.

Stretching payables beyond agreed terms looks like free finance, but it carries risks. Suppliers may withdraw credit, demand cash on delivery, raise prices, cut priority on supply or deliveries, or refuse to cooperate in a shortage. Your credit rating may suffer. Late payment interest or legal action may follow, and in some countries late-payment legislation applies. Loss of goodwill can be costly if the supplier is hard to replace.

Good management therefore balances cost, risk and relationships. Pay on time as a rule, use agreed credit fully, take discounts when they are worth more than the cost of finance, and negotiate longer terms from a position of strength. Payables policy also feeds the working capital cycle: longer payables days shorten the cash operating cycle.

Key rules to remember

Simple cost of forgoing the discount (per period)
d ÷ (100 − d)
d is the discount % . For 2% this is 2 ÷ 98 = 2.04%. This is the cost over the extra credit period, not a year.
Annualised cost (compound)
(1 + d ÷ (100 − d))^(365 ÷ N) − 1
N is the days of extra credit gained by not taking the discount (final due date minus discount date). This is the preferred and more accurate method.
Annualised cost (simple)
d ÷ (100 − d) × 365 ÷ N
Quick approximation. It gives a lower figure than the compound method and understates the true cost. Use compound unless the question asks for simple.
Payables days
Trade payables ÷ Cost of sales (or credit purchases) × 365
Use purchases if given. Use year-end payables unless an average is requested.
Decision rule
Take the discount if annualised cost of forgoing it > cost of short-term finance
If the cost of finance is higher, it is cheaper to forgo the discount and pay later.

How to solve Accounts Payable Management questions

Use this method for any question on settlement discounts or supplier credit.

  1. 1Identify the discount percentage d, the discount period and the normal credit period.
  2. 2Calculate N, the extra days of credit you get by not taking the discount: normal credit days minus discount days.
  3. 3Calculate the cost for the period: d ÷ (100 − d).
  4. 4Annualise it. Use (1 + period cost)^(365 ÷ N) − 1 unless the question asks for a simple rate.
  5. 5Identify your cost of short-term finance, such as overdraft rate or loan interest.
  6. 6Compare the two rates. Take the discount if the annualised cost is higher than your finance cost.
  7. 7If asked for a recommendation, add non-financial points: supplier relationship, cash availability, risk of late payment.
  8. 8State a clear conclusion with the figures.

Quickest way: Fast discount decision

When to use it: Use in Section A or B objective questions where only a rate or a yes/no decision is needed.

  1. Write d ÷ (100 − d) straight away, for example 1.5 ÷ 98.5.
  2. Find N as the days gained.
  3. Raise 1 plus the period cost to the power 365 ÷ N, then subtract 1.
  4. Compare with the finance rate and pick the cheaper option.
  5. If the options differ only in the simple versus compound method, read the question to see which is asked.

Common mistakes in Accounts Payable Management

  • Using d ÷ 100 instead of d ÷ (100 − d).

    Students treat the discount as the cost of the finance.

    Fix: The discount is based on the invoice price. You actually pay 100 − d if you pay early, so the cost is measured on that smaller amount.

  • Using the full credit period as N.

    It seems the credit period is what matters.

    Fix: N is only the extra time gained by not taking the discount. For 2/10 net 30, N is 20 days, not 30.

  • Giving a simple rate when the question wants compound.

    The simple formula is quicker.

    Fix: Use the compound formula by default. Read the wording and the requirement carefully.

  • Deciding without comparing to the cost of finance.

    A high annualised rate looks automatically attractive.

    Fix: Always compare with the overdraft or loan rate, and state which is cheaper.

  • Forgetting the risks of stretching payables.

    Students focus on calculation and treat late payment as free.

    Fix: In written parts, list loss of discount, supplier refusal, higher prices, lower credit rating, late payment charges and damaged relationships.

  • Computing the rate with 360 or 12 months inconsistently.

    Mixing conventions within one answer.

    Fix: Use 365 days unless told otherwise and keep the same basis throughout.

Worked examples

Example 1

A supplier offers 2% discount for payment within 10 days. Otherwise the full amount is due in 40 days. Your overdraft costs 12% a year. Calculate the annualised cost of forgoing the discount (compound) and advise whether to take it.

Show the solution
  1. d = 2, so period cost = 2 ÷ 98 = 0.020408, or 2.04%.
  2. N = 40 − 10 = 30 days.
  3. Number of periods in a year = 365 ÷ 30 = 12.1667.
  4. Annualised cost = (1.020408)^12.1667 − 1.
  5. ln(1.020408) = 0.020204. Multiply by 12.1667 = 0.24582.
  6. e^0.24582 = 1.2788, so annualised cost = 27.9%.
  7. Compare with the 12% overdraft rate. Forgoing the discount costs about 27.9%, which is more than 12%.

Answer: The annualised cost of forgoing the discount is about 27.9%. Take the discount and finance the early payment with the overdraft at 12%.

Example 2

A company has credit purchases of ₹7,30,00,000 a year and trade payables of ₹1,00,00,000. The supplier terms are 30 days. Calculate payables days and comment on the position. Also state two risks of the company's payment practice.

Show the solution
  1. Payables days = 1,00,00,000 ÷ 7,30,00,000 × 365.
  2. 1,00,00,000 ÷ 7,30,00,000 = 0.136986.
  3. 0.136986 × 365 = 50 days.
  4. Terms are 30 days, so the company takes 20 days longer than agreed.
  5. Risks: suppliers may withdraw credit or demand earlier payment, and may charge late payment interest or raise prices. Credit rating and supplier goodwill may also suffer.

Answer: Payables days are 50 against terms of 30 days. The company is stretching payables by about 20 days. This saves cash now but risks loss of credit, higher prices, late-payment charges and damaged supplier relationships.

Exam tips

  • In objective questions, read whether the answer must be simple or compound annualised. Compound is the usual default.
  • Always work out N as the extra days, not the total credit period.
  • In a Section C question, show the formula, the numbers and a comparison with finance cost before concluding.
  • When asked to discuss, give both financial and non-financial points. Marks usually come from covering several distinct points.
  • Link payables to the cash operating cycle: longer payables days shorten it, but only if suppliers accept it.

Practice questions from Management of inventories, accounts receivable, accounts payable and cash

Accounts Payable Management in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Accounts Payable Management: frequently asked questions

How do I calculate the annualised cost of an early payment discount?

First find the period cost d ÷ (100 − d). Then compound it over the number of periods in a year, 365 ÷ N, where N is the extra days of credit. Subtract 1 to get the annual rate.

Is trade credit a free source of finance?

It is free only if you pay within the stated terms and no discount is lost. If a discount is offered for early payment and you forgo it, trade credit has an implied interest cost that can be very high.

When should a company take an early settlement discount?

Take it when the annualised cost of forgoing it is higher than the company's cost of short-term finance, such as its overdraft rate. If borrowing is dearer, it is better to pay late and forgo the discount.

What are the risks of delaying supplier payments?

Suppliers may withdraw credit, insist on cash payment, raise prices or cut priority in a shortage. Late-payment interest, a damaged credit rating and poor relationships can follow.