Posting and withdrawing collateral: tax classification and treatment
Posting collateral into a lending protocol, and withdrawing it, are classified non_taxable: the depositor keeps beneficial ownership of the pledged asset, so there is no disposition and no income.
Example last verified 2026-08-06 against the live engine. CryptoTaxEdge Team.
Tax treatment
House treatment: non_taxable for collateral_supply and collateral_withdraw. The alias collateral is retired and is not an engine-emittable category.
This mapping comes from the closed CryptoTaxEdge classification taxonomy: every verdict resolves to one category and one of five treatments (disposal, income, non_taxable, expense, needs_review), with a confidence score and review routing when sources disagree.
How the engine reads this shape
Collateral mechanics look like transfers to a contract but carry a lien. The engine classifies the deposit and withdrawal legs as non-taxable movements while tracking the shapes that change the analysis: receiving an interest-bearing receipt token against the deposit, collateral that is rehypothecated into a yield position, and above all liquidation, where the protocol seizes and sells the collateral, a forced disposition with gain or loss measured against the collateral’s basis. Those edges are distinct categories, kept out of the plain collateral verdict.
A real classification
{
"api_version": "v1",
"hash": "0x0008c6178140df4c448c5a4ebc92aaedf62ff2a9dfc6a7208f104d852d49c2e4",
"chain": "ethereum",
"category": "collateral_supply",
"treatment": "non_taxable",
"taxable": false,
"confidence": 85,
"needs_review": false,
"ledger_action": "Add to Pool",
"protocol": "Aave V3",
"description": "Assets deposited into a lending position: a aToken (aEthWETH) for the same economic interest was minted, not a cross-asset disposal. Treated as a non-taxable deposit.",
"review_note": null,
"grey_area": null,
"assets": {
"sent": [
{
"symbol": "WETH",
"amount": "200.047905",
"decimals": 18,
"action": "transferred",
"token_address": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
"to": "0x4d5f47fa6a74757f35c14fd3a6ef8e3c9bc514e8"
}
],
"received": [
{
"symbol": "aEthWETH",
"amount": "200.089689",
"decimals": 18,
"action": "received",
"token_address": "0x4d5f47fa6a74757f35c14fd3a6ef8e3c9bc514e8",
"token_name": "Aave Ethereum WETH",
"from": "0x0000000000000000000000000000000000000000"
}
],
"gas": null
}
}
Verbatim wire response from the live engine. Last verified 2026-08-06 by live replay. Check any transaction yourself in the Classification Explorer.
Verified rules behind this category
The engine backs this category with 54 verified contract-level rules across 6 chains, each earned from repeated on-chain observation and cross-source agreement rather than a heuristic guess. A small illustrative sample:
| Protocol | Chain | Category | Confidence |
|---|---|---|---|
| aave v3 | ethereum | collateral_withdraw | high |
| aave v3 | arbitrum | collateral_withdraw | high |
| multiple | base | collateral_withdraw | high |
| multiple | bsc | collateral_withdraw | high |
| Convex Finance | ethereum | collateral_supply | high |
Illustrative sample of the 54 verified rules behind this page: the full mappings are served through the API.
Limitations
What this page does not decide. Some markets mint a receipt token against deposits; whether that mint is itself a realization event follows the same reasoning as the wrap grey area. A liquid-staking redeem currently served as collateral_withdraw does not honor the mint-side election (Standard GAP-2). Liquidations are a distinct category: house treatment disposal, grey and role-dependent. Confidence is a corroboration signal, not an accuracy percentage: when independent parses of a transaction disagree, the engine returns needs_review with taxable: null rather than guessing.
Frequently asked questions
What tax treatment does this page document?
House treatment follows the CryptoTaxEdge Classification Standard. Categories with no fixed mapping (GAP-3) tell you to read the treatment field on the record rather than infer it from the category name.
Where is the closed vocabulary published?
The versioned Classification Standard at https://cryptotaxedge.com/standard/ enumerates emitted categories and the five-treatment enum. This encyclopedia page is a worked example on top of that Standard.
Are the wire examples still current?
Yes. Each example is verbatim engine output, re-verified on a daily replay against the live engine.
Not tax advice. CryptoTaxEdge is software, not a licensed tax advisor. Classifications and the treatments described here are informational only; verify results and consult a qualified tax professional before filing. IRC section references are general framing.