Businesses often report different income for financial accounting and tax purposes. Financial statements aim to show economic performance, while tax returns aim to compute taxable income under IRS rules. This creates book–tax differences, which must be reconciled on Schedules L, M‑1, and M‑3.
Entities Exempt From Schedules L, M‑1, and M‑2
These entities do not need to complete Schedules L, M‑1, or M‑2:
- C or S corporations with < $250,000 in total receipts and total assets < $250,000
- Partnerships with < $250,000 in receipts and total assets < $1 million
All others must complete the required schedules.
Schedule L — Balance Sheet per Books
Schedule L reports:
- Beginning and ending assets
- Liabilities
- Equity / capital accounts
It must match the entity’s books and financial statements.
Schedule M‑2 — Analysis of Capital / Retained Earnings
Tracks changes in:
- Retained earnings (C corporations)
- AAA, AE&P, OAA, PTI (S corporations)
- Partners’ capital accounts (partnerships)
Shows how income, losses, contributions, and distributions affect equity.
Reconciling Book and Tax Income
Schedules M‑1 and M‑3 reconcile financial accounting income with taxable income.
Book income includes:
- Items not deductible for tax (e.g., nondeductible meals, fines)
- Items not taxable (e.g., tax‑exempt interest)
Tax income includes:
- Items recognized earlier or later than book
- Items deductible for tax but not recorded in books
Schedules M‑1 and M‑3 bridge these differences.
Schedule M‑1 Filing Requirements
Required for:
- C and S corporations with ≥ $250,000 in receipts or assets
- Partnerships with ≥ $250,000 in receipts or ≥ $1 million in assets
If Schedule M‑3 is required, M‑1 is not used.
Schedule M‑3 Filing Requirements
Schedule M‑3 is required when:
Corporations
- Total assets ≥ $10 million
Partnerships
Any of the following:
- Total assets ≥ $10 million
- Adjusted total assets ≥ $10 million
- Total receipts ≥ $35 million
- A 50%+ reportable entity partner exists
M‑3 requires detailed reporting of temporary and permanent differences.
Book–Tax Differences
Temporary Differences
Reverse in future periods. Examples:
- Depreciation (accelerated for tax, straight‑line for books)
- Prepaid rent (taxable when received; book when earned)
- Expenses accrued for books but deductible later for tax
Permanent Differences
Never reverse. Examples:
- Tax‑exempt interest
- Nondeductible fines and penalties
- Nondeductible political contributions
- Life insurance proceeds
- 50% meals; nondeductible entertainment
- Excess business gifts (> $25)
Schedule M‑1 Adjustments
Increase Book Income (Add‑Backs)
- Federal income tax expense
- Excess capital losses (C corporations)
- Income taxable now but not yet on books
- Nondeductible expenses (fines, political contributions, nondeductible meals, entertainment, excess gifts)
- Book depreciation > tax depreciation
- Reserves and estimated expenses not deductible for tax
Reduce Book Income (Subtractions)
- Tax‑exempt interest
- Life insurance proceeds
- Installment sale income deferred for tax
- Tax depreciation > book depreciation
- DRD (C corporations)
- Charitable contribution carryovers
Schedule M‑3 Structure
Schedule M‑3 includes:
- Part I: Financial statement income
- Part II: Income reconciliation
- Part III: Expense/deduction reconciliation
Each line requires:
- Book amount
- Temporary difference
- Permanent difference
- Tax amount
M‑3 provides transparency into book–tax differences for large entities.