ACCOUNTING · FREE FOUNDATIONS COURSE

Managerial Accounting Basics

Use simple cost models, contribution margin, budgets and variances to support internal decisions. Learn the assumptions behind the numbers rather than treating a calculation as a prediction.

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01 · Internal decisions and useful informationOpen lesson

Two workshop colleagues review production plans and business information. — Internal decisions and useful information · Original lesson illustration

Managerial accounting helps people inside an organization plan, monitor and decide. Reports may focus on one product, team or process rather than the entire organization. Start with the decision being considered, then choose relevant information. A detailed report is not useful if it answers a different question from the one the manager needs to resolve.

Worked example

A workshop deciding whether to add an evening shift needs expected extra sales, extra costs, capacity and staffing information.

Try it yourself

Describe an internal decision and list three numbers and one nonfinancial fact you would need.

Who is the main audience for managerial accounting?Only external shareholdersInternal decision-makersOnly tax authoritiesCustomers buying a receipt

02 · Fixed, variable and mixed costsOpen lessonLocked — complete previous lessons

Workshop owners compare production records, packaging and finished ceramic mugs. — Fixed, variable and mixed costs · Original lesson illustration

A fixed cost stays approximately unchanged in total within a relevant range of activity. A variable cost changes with the activity measure. A mixed cost has both parts. These are model assumptions over a specified period and operating range; a cost can behave differently when capacity changes or contracts are renewed.

Worked example

In a simplified workshop, rent is $1,200 monthly and materials are $8 per item. Making 100 items gives $800 of material cost; 200 gives $1,600.

Try it yourself

Classify monthly rent, per-item packaging and a utility bill with a base charge plus usage.

A $3 packaging cost for each item is modeled as what?Fixed total costVariable costA sunk revenueOwner equity

03 · Contribution marginOpen lessonLocked — complete previous lessons

Workshop owners examine a ceramic mug beside raw clay, packaging and a calculator. — Contribution margin · Original lesson illustration

Contribution margin equals sales less variable costs. Per unit, subtract variable cost per unit from selling price. This amount first covers fixed costs; only after fixed costs are covered does the simplified model show operating profit. Contribution margin is not the same as cash in the bank or gross profit calculated under every financial-reporting format.

Worked example

Price $30 less variable cost $12 gives $18 contribution per unit. For 100 units, total contribution is $1,800 before fixed costs.

Try it yourself

Calculate contribution for a $25 item with $9 variable cost: $16 per unit.

Price is $40 and variable cost is $15. Contribution per unit is?$15$25$40$55

04 · Break-even and margin of safetyOpen lessonLocked — complete previous lessons

A workshop owner counts finished mugs and checks a production notebook. — Break-even and margin of safety · Original lesson illustration

For a single-product model, break-even units equal fixed costs divided by positive contribution margin per unit. Round up when whole units are required. The model assumes the stated price and variable cost remain stable and that the units can be sold. Margin of safety compares planned or actual sales with break-even sales; it does not guarantee protection from every business risk.

Worked example

Fixed cost $900 and contribution $15 per unit: break-even is 60 units. Planned sales of 80 units give a 20-unit margin of safety.

Try it yourself

Use the Cost Model Lab to test how a higher variable cost changes break-even.

Fixed cost $1,000 and contribution $20 per unit gives break-even of?20 units40 units50 units1,000 units

05 · Budgets and variancesOpen lessonLocked — complete previous lessons

Two colleagues compare planned costs with receipts and actual spending. — Budgets and variances · Original lesson illustration

A budget records assumptions and planned amounts. A variance compares actual results with the plan; always state your sign convention. A flexible budget adjusts variable costs for actual activity, making it easier to distinguish a spending difference from a volume difference. A favorable cost variance can still reflect an undesirable choice, such as postponing necessary maintenance.

Worked example

A cost budget at actual output allows $600; actual spending is $660. Using actual minus budget gives +$60, unfavorable for cost.

Try it yourself

Calculate actual $540 minus budget $600: −$60, favorable for cost under this convention.

Why adjust a variable-cost budget for actual output?To hide spendingTo compare costs at a comparable activity levelTo erase fixed costsTo guarantee profit

06 · Relevant costs and balanced decisionsOpen lessonLocked — complete previous lessons

Two workshop owners compare older and newer pottery equipment. — Relevant costs and balanced decisions · Original lesson illustration

Relevant costs differ between the alternatives being considered. A past cost that cannot be recovered is sunk and does not change because of the new decision. Opportunity cost represents a benefit given up by choosing one option. Consider quality, staff, safety and customers alongside the numbers, and make uncertainty explicit.

Worked example

A machine purchased last year cannot be returned. Its historical price is not the incremental cost of today’s decision, though future maintenance and alternative use may matter.

Try it yourself

Complete your workshop project and list two assumptions that could fail.

Which is normally irrelevant to a new decision if it cannot be recovered?Future extra laborLost alternative revenueA sunk historical purchase costFuture material use

Managerial Accounting Basics

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