
Schedule M-1 and M-3: Reconciling GAAP Book Income to Taxable Income
Schedule M-1 and M-3 reconcile GAAP book income to taxable income on Form 1120. Learn the $10M and $50M asset thresholds, permanent vs.
#depreciation
Methods and strategies for depreciating fixed assets including straight-line, MACRS, and accelerated depreciation

Schedule M-1 and M-3 reconcile GAAP book income to taxable income on Form 1120. Learn the $10M and $50M asset thresholds, permanent vs.

OBBBA permanently restored the EBITDA-based ATI calculation for Section 163(j) starting in 2025, expanding deductible business interest for capital-intensive companies. A guide to the 30% cap, the ~$31M small business exemption, the 35% syndicate trap, EBIE allocations from partnerships, S-corp differences, and Form 8990 reporting.

Section 280F caps first-year depreciation on passenger autos at $20,300 in 2026, but SUVs and trucks rated above 6,000 lbs GVWR escape those limits and can combine a $32,000 Section 179 deduction with 100% bonus depreciation. A practical guide to the 2026 numbers, the heavy-vehicle and pickup carve-outs, the 50% business-use cliff, and the mileage-log standards an IRS auditor expects.

How short-term rentals sit outside the Section 469 passive loss rules, what the seven-day average and material participation tests actually require, and how a six-figure W-2 earner can use cost segregation and 100% bonus depreciation to legally offset wage income.

Form 3115 lets U.S. taxpayers change accounting methods and use a Section 481(a) adjustment to recover missed deductions or correct multi-year errors on a single current-year return, without amending prior years.

Section 469 makes rental losses passive by default, so most cannot offset W-2 income. This guide covers the $25,000 special allowance and its $100k–$150k MAGI phase-out, the 750-hour and 50% real estate professional tests, the 1.469-9(g) aggregation election, audit-tested time-log practices, and how suspended losses unlock on disposition.

Section 1031 lets real estate investors defer capital gains and depreciation recapture by swapping investment properties, but only when the 45-day identification window, 180-day closing deadline, qualified intermediary rules, and post-TCJA like-kind requirements are followed exactly.

A cost segregation study reclassifies a building's components into shorter MACRS lives, unlocking the 100% bonus depreciation permanently restored by the One Big Beautiful Bill Act of July 2025. On a $1M residential rental, that swings first-year tax savings from roughly $10,700 to roughly $90,600—provided the investor clears IRC §469 passive activity loss limits.

US small business tax deductions for 2026: IRS-backed limits, business-use rules, and records to keep for mileage, meals, equipment, and operating expenses.

A category-by-category breakdown of how small businesses deduct website costs in 2026 under Section 174A, including the OBBBA retroactive election deadline of July 6, 2026, and where each expense lands on Schedule C.

A small business owner's guide to year-end tax planning, covering income timing, retirement contributions, Section 179 and 100% bonus depreciation, HSAs, entity structure, and the QBI deduction with 2026 limits.

A working landlord's reference to every major rental property deduction—mortgage interest, 27.5-year depreciation, the $25,000 passive loss allowance, 100% bonus depreciation restored under OBBBA, Section 199A QBI, and the safe harbors and recordkeeping that keep Schedule E audit-ready.