Section Learning Objectives
The Income Statement as the Starting Point
The Income Statement (IS) is always the first statement you build in a three-statement model. It's the most intuitive: Revenue minus expenses equals profit. But every line item on the IS has a downstream impact on the BS and CF.
π Simplified Income Statement with Linkage Points
| Line Item | IS Amount | Links To | Impact |
|---|---|---|---|
| Revenue | $500M | BS: Accounts Receivable | AR increases if not all cash collected |
| (β) COGS | ($300M) | BS: Inventory, AP | Inventory decreases; AP may increase |
| Gross Profit | $200M | β | Subtotal only |
| (β) Selling, General, and Administrative (SGA) Expenses | ($60M) | BS: Prepaid expenses, accrued liabilities | Working capital adjustments |
| (β) Depreciation & Amortization | ($25M) | BS: PP&E / Intangibles; CF: Add back | Reduces assets; non-cash add-back |
| EBIT (Operating Income) | $115M | β | Key profitability metric |
| (β) Interest Expense | ($15M) | BS: Debt schedule; CF: Already in NI | From debt schedule; not repeated in CF |
| (β) Tax Expense | ($25M) | BS: Deferred tax; CF: Tax paid adjustment | May differ from cash taxes paid |
| Net Income | $75M | BS: Retained Earnings; CF: Starting point | The master link |
Revenue β Accounts Receivable β Cash Flow
π Revenue and Cash Collection
Not all revenue is collected in cash during the period. The difference becomes Accounts Receivable.
Cash Collected = Revenue β ΞAR
ΞAR = Ending AR β Beginning AR
If ΞAR > 0: Revenue exceeded cash collected β cash outflow in CF
If ΞAR < 0: Collected more than revenue β cash inflow in CF
Forecast AR: AR = Revenue Γ (DSO / 365)
Cash Impact: = Prior AR β Current AR (positive = inflow)
COGS & Expenses β Inventory, AP β Cash Flow
π¦ Cost of Goods Sold and Working Capital
COGS drives inventory usage and accounts payable changes.
Ξ Inventory = Ending Inv β Beginning Inv
β Increase in Inventory = cash outflow (consumed cash)
Accounts Payable (BS) = COGS Γ (DPO / 365)
Ξ AP = Ending AP β Beginning AP
β Increase in AP = cash inflow (delayed payment)
This is where most students make mistakes. Remember:
β’ Asset increase (ARβ, Invβ) = Cash OUTFLOW β subtract
β’ Liability increase (APβ, Accruedβ) = Cash INFLOW β add
Mnemonic: "Assets are bad for cash, liabilities are good for cash"
Depreciation β PP&E and Cash Flow Add-Back
π§ Depreciation's Triple Appearance
Depreciation is unique because it appears on all three statements:
Income Statement
Reduces operating income as an expense
Balance Sheet
Reduces net PP&E through accumulated depreciation
Cash Flow Statement
Added back to net income (non-cash expense)
Depreciation reduces net income but doesn't use cash. The cash outflow happened earlier when the asset was purchased (CapEx). By adding D&A back to net income, we reverse the non-cash expense to find true operating cash flow. This avoids double-counting the CapEx outflow.
Interest Expense β Debt Schedule
π¦ Interest Expense Flow
Interest expense links the IS to the debt schedule built in Lecture 7.
= (Beg Debt + End Debt) / 2 Γ Rate
Simplified: = Beg Debt Γ Rate (avoids circular reference)
Cash Flow Impact: Interest is already in Net Income.
Do NOT show it again in Financing section of CF.
Only PRINCIPAL repayment goes in Financing CF.
Tax Expense β Deferred Taxes and Cash Taxes
ποΈ Tax in the Three Statements
Book tax expense (IS) may differ from actual cash taxes paid.
Cash Taxes Paid (CF) = Tax Expense β Ξ Deferred Tax
Deferred Tax (BS) = Tax Expense β Cash Taxes Paid
If DTL increases: Less cash tax paid than book tax β cash inflow
If DTA increases: More cash tax paid than book tax β cash outflow
In many models, we assume Tax Expense = Cash Taxes Paid (no deferred tax changes). This simplification works when there are no significant timing differences between book and tax accounting.
Net Income: The Master Link
π Net Income Touches Every Statement
- IS: The bottom line β Revenue minus all expenses
- BS: Added to Retained Earnings (minus dividends)
- CF: Starting point for the indirect cash flow statement
Operating CF (CF) = Net Income + D&A + Ξ NWC
Net Income connects IS output to BS equity and CF operations
Hands-on Exercises: Working Capital & Depreciation
Two short exercises to practice Income Statement linkages to working capital and depreciation. Download the CSVs and follow the condensed instructions below. Full step-by-step solutions are hidden and revealed via the Show / Hide Solution Steps button.
Download Working Capital CSV Download Depreciation CSV Download Full Guide (includes solutions)
Exercise A β Working Capital
- Open the Working Capital CSV in Excel.
- Compute AR = Revenue Γ (DSO / 365), Inventory = COGS Γ (DIO / 365), AP = COGS Γ (DPO / 365).
- Calculate the change (Current β Prior) and determine the cash flow sign for each item.
Exercise B β Depreciation & PP&E
- Open the Depreciation CSV in Excel.
- Use CapEx and Useful Life to validate Depreciation and build the PP&E roll-forward: Ending PP&E = Beg PP&E + CapEx β Depreciation.
- Confirm Depreciation flows to IS (expense), reduces Net PP&E on BS, and is added back on CF.
Key Takeaways
- Revenue links to AR; COGS links to Inventory and AP on the BS
- Depreciation appears on all three statements β expense, asset reduction, and add-back
- Interest comes from the debt schedule and is already captured in Net Income
- Tax expense may differ from cash taxes β the difference creates deferred tax
- Net Income is the master link: it feeds both the BS (retained earnings) and CF (starting point)