How Often Should You Revoke Crypto Token Approvals?

Most wallets should have their token approvals reviewed at least once a month as a baseline habit, with an additional immediate check triggered any time you interact with a new or unfamiliar dApp, claim an airdrop, or notice unusual wallet activity — since approvals don't expire on their own and accumulate silently the longer a wallet is used.

If you're unfamiliar with what an approval actually is, see our explainer on what token approvals are. This guide focuses on the practical cadence for managing them once you understand the mechanics.

Why a routine cadence matters

Every approval you grant remains active on-chain indefinitely — there is no automatic expiration — until you explicitly revoke it or use it up entirely (in the case of a limited approval). Over months or years of DeFi activity, it's common for an active wallet to accumulate dozens of approvals, many to protocols you tried once, stopped using, and forgot existed. Each one is a live liability that persists whether or not you're paying attention to it, which is exactly why a periodic, scheduled review — rather than a reactive one — is the more reliable approach.

Baseline cadence: monthly

For a wallet used regularly across multiple DeFi protocols, a monthly review is a reasonable default: open an approval-checking tool, review the list of active approvals, and revoke anything tied to a protocol you no longer use, don't recognize, or can't confirm you approved on purpose. Monthly strikes a workable balance — frequent enough to limit how long a stale approval sits exposed, without becoming a chore you're likely to skip.

For a wallet used only occasionally, or one holding significant value, a shorter interval (every one to two weeks) or a check immediately after every session of DeFi activity may be more appropriate given the higher stakes or the fact that infrequent use makes it easier to lose track of what you've approved and when.

Event-based triggers that warrant an immediate check

Beyond the routine cadence, certain events should prompt an immediate approval review regardless of when your last scheduled check happened:

• After connecting to any new or unfamiliar dApp, especially one you haven't thoroughly vetted — check what was actually approved immediately afterward, not weeks later.
• After claiming any airdrop, since claim sites are a common vector for wallet drainers disguising a malicious approval as a routine claim transaction.
• After any period of reduced attention to your wallet — returning to DeFi activity after months away is a good moment to audit everything accumulated in the interim, including from protocols that may have since been compromised or shut down.
• Immediately after any public disclosure of a hack or exploit affecting a protocol you've ever interacted with, even if you stopped using it long ago — a live approval to a since-compromised contract is exactly the scenario that turns into a loss.
• If you notice any unexpected transaction or balance change in your wallet — revoke everything you don't immediately recognize as a precaution while investigating further.

Revocation cadence summary

Trigger	Recommended action
Routine schedule	Full approval review monthly (more often for high-value or infrequently used wallets)
New/unfamiliar dApp interaction	Check and revoke unnecessary approvals same day
Airdrop claim	Immediate review of the claim transaction's actual permissions
Returning after time away	Full audit before further activity
News of a hack affecting a used protocol	Immediate revocation of that specific approval
Unexplained wallet activity	Revoke everything unrecognized, then investigate

How to actually revoke

Revoking sets the approved amount back to zero, which itself requires a small on-chain transaction and gas fee — this is a real, if minor, cost of the review habit, and part of why unlimited approvals to protocols you use constantly are sometimes a deliberate tradeoff rather than something to revoke reflexively (see our comparison of unlimited vs. limited approvals). Dedicated approval-checking dashboards typically let you view and revoke multiple approvals across several chains from one interface — our roundup of approval checker tools compares the leading options.

Building the habit

Setting a recurring calendar reminder is a simple, effective way to make monthly reviews actually happen rather than remaining a good intention. Pairing the review with something you already do regularly — like a monthly portfolio check via a DeFi tracking page — makes it easier to sustain. This routine sits alongside other foundational habits covered in our DeFi wallet security guide and broader wallet OPSEC practices.

Bottom line

Approvals are a "set once, forget forever" mechanism by default, which is precisely the problem — the forgetting is where the risk accumulates. A monthly routine review, combined with immediate checks after specific higher-risk events like airdrops or new dApp use, keeps your actual exposure close to what you intend it to be, rather than an ever-growing, unmonitored list of permissions.