Front matter

• Homework 1 due next week
  • Available on eLearn
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• Covers topics from today’s session

Learning objectives

History: Before double entry

• 8500 BCE: Shaped clay tokens represent commodities
• 200 BCE: Arabic numerals (except 0)
• 600 CE: 0 developed
• 800 CE: 10-digit numerals spread throughout Europe

http://www.schoyencollection.com/mathematics-collection/pre-literate-counting/bulla-envelope-ms-4631

*Note: This slide is based on a history lecture by Dr. Pierre Liang at Carnegie Mellon from October 2017

History: Double entry

*Note: This slide is based on a history lecture by Dr. Pierre Liang at Carnegie Mellon from October 2017

History: Journal entries

Images from Littleton 1928 TAR.

History: Journal entry evolution

Shakespeare likely did this sort of work for the British Navy! (Source: Reynolds 1974 JAR)

History: Impact

The Principles of Book-keeping by Double Entry constitute a theory which is mathematically by no means uninteresting: it is in fact like Euclid’s theory of ratios an absolutely perfect one, and it is only its extreme simplicity which prevents it from being as interesting as it would otherwise be.
– Arthur Cayley, FRS, The Principles of Book-keeping by Double Entry, 1894.

Bookkeeping has become a real technology instead of a simple clerical routine, and in addition there has grown up a profession of accounting which reaches quite beyond bookkeeping.
– A. C. Littleton, The Evolution of the Journal Entry, 1928.

Debits and credits

The side of an account that increases its balance is called the account’s normal balance

Debits always equal credits for a transaction

Representing accounts: T-accounts

Normal balances

Review: Debits & credits

1. Where do debits go?
2. Where do credits go?
3. What do debits equal?
4. What do credits equal?

Why does this all matter?

\[ \begin{align*} A = L + E\qquad &A,L,E \in (-\infty,\infty)\\ DR = CR\qquad &DR,CR > 0 \end{align*} \]

• Both of these equations inherently require that at least two changes are made with each transaction
  • For the top equation, the changes must either:
    • Affect both sides in the same direction, or
    • Cancel out within one side
  • For the bottom equation, the change must have a debit and a credit
• As these hold at the smallest element of the system, they aggregate up to hold for any amount of transactions
  • I.e., for a whole company or any subset thereof

Now we have a robust way to check for mistakes anywhere in our accounting system – just check each equation!

Accounts

Source documents

General journal

DR = CR for each entry

Constructing journal entries

Constructing journal entries

1. Get the in class activity spreadsheet
   • Session_2_Activity.xlsx
2. We’ll go through the first three transactions together
   • Journal entries
3. Journal (i.e., right out journal entries for) the next 11 transactions with your group in the blue tab of the spreadsheet
   • We’ll do the rest of the activity throughout the class today

General ledger

• An aggregation of all the accounts
• Shows all account balances
• Includes details of each account
• T-accounts sufficient for this course

Trial Balance

DR = CR for totals

Constructing the trial balance

Limits of the trial balance

• Can’t catch:
  • Unrecorded transactions
    • Because there’s no trace of them
  • Wrong amounts in transactions that balance in the journal
    • Everything still balances
  • Wrong accounts of the same type used in the journal
    • Everything still balances
    • \(A = L + E\) holds

What you can catch

• Let the Out of balance (OOB) amount be:
  • \(OOB = Assets - Liabilities - Equity\)
• If OOB / 2 is an integer
  • DR and CR in a transaction may be flipped
    • Ex.: Recorded a cash sale as a CR to cash and a CR to revenue
      • Should be a DR to cash and a CR to revenue
• If OOB / 9 is an integer, there may be a:
  • Slide error (multiplied by 10 or divided by 10):
    • Ex.: Recorded 5,400 instead of 54,000
  • Transposition error (flipped the first 2 digits)
    • Ex.: Recorded 45,000 instead of 54,000

T-accounts and the trial balance

1. Return to the in class activity
2. We’ll do the first one as a class
3. Finish the rest of the activity with your group
   • Do the two green tabs

Cash basis accounting

• Records cash only transactions
• Used by small companies
• \(Profit = Cash~in - Cash~out\)

PROBLEM

• This ignores underlying economic activity
  • If we make a sale on credit, that doesn’t add to profit
  • If we put an expense on credit, it doesn’t lower profit

Accrual accounting

• Records impact of transactions as they occur
• Required per IAS1, “Presentation of Financial Statements”
• Revenue recorded when it is “more likely than not”
• Expenses recorded as incurred
• Profit = Revenue - Expenses

PROBLEM

• Profit may not be indicative of cashflows
  • This is a concern for lenders
    • If there’s no cash, profit doesn’t matter, as the company will go bankrupt

Accrual transaction examples

Periodicity

Don’t focus on this too much for this class

Revenue recognition principal

• Recognize revenue in the period it was earned
  • This may not be when cash is received
• Goods revenue recorded when it is more likely than not
• Service revenue recorded at the percentage complete
  • If 50% of the work is finished, record 50% of the revenue
  • If 20% of the work is finished, record 20% of the revenue

This will lead to a lot of tricky accounting, but mostly around period ends

Recognizing revenue

• Record revenue when:
  • Revenue can be measured reliably
  • Economic benefits are more likely than not
• For goods, you also need to:
  • Transfer any significant risks to buyer
    • If we are shipping [FOB destination], wait until received
    • If they handle shipping [FOB shipping point], wait until picked up for delivery
  • Have no continuing managerial involvement (to an extent)
  • Be able to reliably measure all costs incurred from the transaction
• For services, you also need to be able to reliably measure:
  • The stage of completion
  • The costs incurred to date and costs to finish

Expense recognition

• Recognize expenses only when an asset is used up
  • Asset purchase \(\ne\) expense
  • Can record partial usage
• Formally, expenses are recognized when:
  1. Obligations are incurred, such as when services have been received
  2. Obligations are offset against recognized revenues (matching principle)

Matching principal: Expenses are recorded in the same period as the related revenue

• E.g., even if we aren’t given an electricity bill that neatly aligns with our fiscal year end, we need to record the portion of the next one associated with the ending fiscal year

Expense matching

When should we record…

1. A sale we are shipping at our expense
2. A sale we are shipping at the buyer’s expense
3. Revenue for a week long consulting project paid for up front
4. Electricity usage
5. Building usage (our building)
6. Sale of inventory for revenue

Why do we need to adjust?

• The matching principle
  • Everything needs to be matched at period end
• Do before balance sheet and income statement
  • Adjustments will go to the trial balance once we record them
  • We call this an Adjusted trial balance
• Why not do this continuously?
  • Too costly – some accounts continuously change
  • Investors only see period-end statements anyway

We’ll only do this at period end

What do we need to adjust?

Adjusting entry types

• Deferral
  • Adjust for prepaid expense (some used)
  • Adjust for unearned revenue (some may be earned)
• Depreciation
  • Some long term assets have been used up
• Accrual
  • Record an expense in advance

Deferral

• Adjustment for cash paid or received in advance
  • Expense or revenue has yet to occur
  • We defer some of it to the next period

Depreciation

• Adjustment for allocating the cost of Property, Plant and Equipment (PP&E) over its useful life
• Record to accumulated depreciation
• Asset’s book value is asset account minus accumulated depreciation
• Depreciate to salvage value
  • What you expect to get when it is used up

Depreciation methods

Accrual

• Accrued expense: debit expense, credit liability

• Accrued revenue: debit asset, credit revenue

Overall effects

Adjusting entries

1. Return to the in class activity
2. 4 adjusting entries to add in
3. Do the three yellow tabs

Closing the books

• Reset all temporary accounts to 0
  • All revenues
  • All expenses
  • Dividends
• Record a credit to temporary accounts with debit balances
  • Expenses, losses, dividends
• Record a debit to temporary accounts with credit balance
  • Revenues, gains
• Helps to track income through each period
  • Since all income-related accounts start each period with 0 balance

Reset temporary accounts at period end

• We close the accounts into retained earnings directly
  • Or close into income summary, and then close that into retained earnings
• Debit Revenue, Credit Retained earnings
• Debit Retained earnings, Credit Expense
• Debit Retained earnings, Credit Dividends

Closing entry

1. Return to the in class activity
2. 1 closing entry to add in
3. Do the two red tabs

Wrap up

• For next week
  1. Recap the reading for this week
  2. Read the pages for next week
     • Capital Structure (Chapter 10)
     • Accounting Statements (Chapter 3, Part B)
  3. Homework to turn in next week
     • Available on eLearn
     • Submit on eLearn
  4. Practice on eLearn
     • Practice on journal entries
     • Automatic feedback provided
• Survey on the class session at rmc.link/101survey2