Drop Swap 1031 Timing Calculator

Drop-swap splits partnership into TIC before 1031 — timing affects audit risk and gain.

Total gain

Tax rate %

Your ownership %

Holding period months (drop to sale)

Audit risk %

Expected audit tax cost

$26,250

Your gain share

$625,000

Your tax if audit fails

$175,000

How the math works

Your gain × tax rate = tax if audit disallows. Risk adjusted by holding period.

$2.5M × 25% × 28% = $175k tax. 13-month hold: risk 20% × 0.75 = 15%. Expected $26,250.

How to Use

Enter total gain.
Enter tax rate %.
Enter your ownership %.
Enter drop-to-sale months (holding period).
Enter audit risk adjustment %.
Read deferred gain at risk.

Frequently Asked Questions

What is a drop-and-swap?

Partnership-held property cannot do 1031 by individual partner. Two steps: (1) 'Drop' — partnership distributes undivided TIC interests to partners pro rata (non-taxable under IRC 731). (2) 'Swap' — each TIC owner does own 1031 into their choice of replacement. Allows partners to go separate ways tax-efficiently. Inverse of 'swap-and-drop' (exchange first, then distribute TIC).

IRS holding period concerns?

IRC 1031 requires property held for 'productive use in trade or business or for investment.' TIC interest received day before sale looks like tax-motivated sham. Rev. Rul. 77-337 says no clear bright-line. Practitioners use 12-24 month holding period (conservative). 6 months minimum. Same-year drop + swap: high audit risk. Best practice: 1-2 tax years between drop and swap transactions.

Audit outcomes?

IRS successfully challenged drop-swap in Chase v. Commissioner (2004) — holding period 1 day, exchange disallowed. Won in Magneson (1985) — 2-year holding period, exchange allowed. Modern settled practice: 12+ month holding = safe. 6-12 months = moderate risk. <6 months = high risk. Audit impact: $100-500k tax + penalty on typical deal. Best to commit to 12+ month holding period.

Alternatives?

(1) Partnership does own 1031 exchange, all partners roll into replacement partnership (simpler, requires partners' agreement). (2) Redemption at book value to exit partners (taxable but clean). (3) 721 UPREIT into DST (tax-deferred, but locks in DST structure). (4) Continue holding and plan stepped-up basis at death. Drop-swap used when partners absolutely must go separate ways before sale.