Per-Leg P&L Options: Track Multi-Leg Truth

Per-Leg P&L Options: Track Multi-Leg Truth

Per-leg P&L options tracking means you can see credit, debit, fees, and open/close status for each contract in a multi-leg structure—not one blurred total that hides which wing is working and which is bleeding. If you trade iron condors, credit spreads, calendars, or any package that is more than a single short option, this is the difference between managing risk and guessing from account equity.

Brokers show you cash. Income sellers need structure truth.

Days to Expiry is built for multi-leg portfolio clarity: import broker history, reconstruct packages, and review per-leg economics so rolls and assignments stay attached to the trade you actually intended.

Why Net P&L Alone Misleads Multi-Leg Traders

Suppose you sell an iron condor for a $1.60 credit ($160):

Leg	Role	Fill
Short 95 put	Credit	+$0.90
Long 90 put	Debit	−$0.25
Short 105 call	Credit	+$0.85
Long 110 call	Debit	−$0.30

Account equity shows +$160 open credit (before mark-to-market). That number does not tell you:

1. Whether the put wing or call wing is under pressure after a directional move
2. How much edge remains on each short after a partial close
3. What you paid to roll only the tested side
4. Whether the long hedge still justifies its debit after IV collapses

When the underlying grinds toward 95, many traders “roll the condor.” In practice they often close and replace only the put spread. If your tracker only stores a new four-leg package, you erase the history of the original put credits and the roll debit that bought time. Net account P&L still moves; per-leg narrative is gone.

That is how people mis-learn their edge: they remember “the condor made money” without knowing the short put did all the work and the call credit was free alpha—or the reverse.

What Per-Leg P&L Must Capture

A usable per-leg ledger for options income has at least:

1. Leg identity — symbol, right (P/C), strike, expiration, side (long/short), multiplier
2. Open fill — quantity, price, fees, timestamp, broker order id
3. Lifecycle events — partial close, full close, roll (close + open), assignment/exercise
4. Running net premium — sum of opens and closes for that leg only
5. Structure membership — which condor / spread / calendar this leg belongs to
6. Status — open, closed, assigned, expired

Without (5), multi-leg tracking collapses into a pile of single-option trades. Without (3)–(4), rolls destroy history.

Related: true cost basis after rolls is the stock-side cousin of this problem. Per-leg P&L is the options-structure cousin. Together they answer what this cycle actually earned.

Worked Example: Partial Roll of a Condor Put Wing

1. Open full condor at $1.60 credit (legs as above).
2. Underlying sells off; short 95 put mark is $1.40 (unrealized loss on that short).
3. You buy back the short 95 put and long 90 put for a $1.10 debit ($110), and sell a later 92/87 put spread for $0.70 credit ($70).

Net for the put wing after the roll:

• Original put spread credit: $0.90 − $0.25 = $0.65
• Roll: paid $1.10, collected $0.70 → −$0.40
• Put-wing economic result so far: $0.25 still in pocket before the new shorts live their life

If your UI only shows “new package credit $0.70 on the puts + untouched call credit,” you will overstate remaining edge. Per-leg P&L keeps the closed put history and the new put history separate but linked under one structure ID.

Broker Exports vs Per-Leg Truth

IBKR Flex Query (and similar full trade exports) give you the raw materials: every fill, fee, and assignment flag. Spreadsheets can store them. They almost never auto-group legs into structures after rolls.

What breaks first in DIY sheets:

• Duplicate symbols across expirations after rolls
• Missing link between buy-to-close and the original short
• Assignment converting a short option into stock without carrying package context
• Multi-account or multi-strategy books with the same underlying

An options portfolio tracker aimed at income sellers should treat structure + leg events as first-class—not as a side project after you already lost a weekend to VLOOKUP.

How to Use Per-Leg P&L in Decisions

Situation	Question per-leg P&L answers
Tested short	How much of original credit remains on this short vs the hedges?
Roll vs close	Is the roll debit larger than remaining edge on the tested leg?
Early profit take	Can I buy back the short winners and leave hedges for tail risk?
Post-assignment	Which closed option premiums still apply to the new stock lot?
Strategy review	Did condors earn more from put wings or call wings this quarter?

That last row is strategy research, not tax. It is also how you stop scaling a structure that only worked because of one lucky wing.

Practical Workflow (Weekly)

1. Import full trade history (Flex or equivalent)—not month-end positions only.
2. Match opens/closes into structures (ratio, strikes, shared open time, broker multi-leg id if present).
3. Attribute every roll and fee to the legs it touched.
4. Recompute per-leg net premium and mark-to-market separately.
5. Review structures with capital at risk—not a flat list of symbols.

If step 2 fails, you do not have multi-leg tracking; you have a fill dump.

Product Path: From Blog to Book

Educational pages on condors and wheels explain how structures work. Per-leg P&L is whether your book is telling the truth. Days to Expiry connects both: commercial tools for scanning (iron condor calculator, strategy) and portfolio import so multi-leg history does not die in CSVs.

Related Reading

• True Cost Basis After Rolls
• Options Portfolio Tracker
• Interactive Brokers Flex Query
• Iron Condor Strategy
• Options Portfolio Management

Expertise: Days to Expiry Trading Team — options income specialists focused on portfolio clarity after rolls, multi-leg structures, and broker data import.