Step-Down vs Step-Up Basis Calculator

Compare the capital gains tax impact of gifting an asset now (carryover/step-down basis under IRC §1015) versus passing it at death (step-up in basis under IRC §1014). Instant, private estate planning analysis.

What you originally paid for the asset
Today's market value of the asset
Federal long-term rate + NIIT (e.g. 20% + 3.8% = 23.8%)
Tax Savings via Inheritance (Step-Up)
Gift Route — Recipient Basis
Gift Route — Tax if Sold Now
Inheritance Route — Basis
Inheritance Route — Tax if Sold
Ad Space

Step-Up vs Step-Down Basis Explained

The step-up in basis rule (IRC §1014) is one of the most powerful estate planning tools in the U.S. tax code. When a beneficiary inherits an asset, their cost basis is automatically reset to the asset's fair market value on the decedent's date of death. All embedded capital gains that accumulated during the owner's lifetime are permanently eliminated — no capital gains tax is ever owed on that appreciation. If the beneficiary sells immediately after inheriting, they owe zero federal capital gains tax.

The step-down rule works in the opposite direction for gifts. Under IRC §1015, when you gift an asset, the recipient inherits your original (carryover) basis. If your basis is $50,000 and the asset is now worth $300,000, the recipient has a $250,000 embedded gain they will eventually owe tax on. If the asset is worth less than your basis (a "loss asset"), the recipient's basis for calculating a loss is stepped down to the current FMV — the loss disappears. Source: IRS Publication 551, IRC §§1014 and 1015. Last updated: May 2026.

Gift vs Inheritance: Side-by-Side Comparison

FactorGift Now (IRC §1015)Inherit at Death (IRC §1014)
Recipient's basisCarryover (your original basis)Step-up to FMV at date of death
Embedded gainsTransferred to recipientPermanently eliminated
Estate tax impactReduces taxable estateAsset included in estate
Annual exclusion$18,000 per donor per recipient (2026)N/A
Best forLoss assets; reducing large estatesAppreciated assets; heirs who will sell

Strategic Planning Considerations

The fundamental rule: never gift a highly appreciated asset to someone who will sell it soon. The step-up in basis at death eliminates the capital gains tax entirely — gifting the same asset forces the recipient to pay capital gains on all your accumulated appreciation. Exception: if your estate is large enough to trigger estate tax (above $13.99M per person in 2026, likely dropping to ~$7M after TCJA sunset), gifting may reduce estate tax exposure more than it costs in capital gains tax for the recipient. This is a math problem that must be solved case by case. Community property states offer an additional advantage: both halves of community property can receive a step-up to FMV at the first spouse's death (IRC §1014(b)(6)). Always consult a qualified estate attorney and CPA before making irrevocable transfer decisions.