diff --git a/CHANGELOG.md b/CHANGELOG.md
index 476d34445d58..407840ebe1bb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -307,6 +307,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (deps) Downgrade to Tendermint [v0.34.20-rc0](https://github.com/tendermint/tendermint/releases/tag/v0.34.20-rc0).
 * [#12089](https://github.com/cosmos/cosmos-sdk/pull/12089) Mark the `TipDecorator` as beta, don't include it in simapp by default.
 * [#12153](https://github.com/cosmos/cosmos-sdk/pull/12153) Add a new `NewSimulationManagerFromAppModules` constructor, to simplify simulation wiring.
+* (x/bank) [#12674](https://github.com/cosmos/cosmos-sdk/pull/12674) Add convenience function `CreatePrefixedAccountStoreKey()` to construct key to access account's balance for a given denom.
 
 ### Bug Fixes
 
diff --git a/x/bank/migrations/v2/store.go b/x/bank/migrations/v2/store.go
index 320a2d1cbbff..84a882d3d40b 100644
--- a/x/bank/migrations/v2/store.go
+++ b/x/bank/migrations/v2/store.go
@@ -63,7 +63,7 @@ func migrateBalanceKeys(store sdk.KVStore) {
 	for ; oldStoreIter.Valid(); oldStoreIter.Next() {
 		addr := v1.AddressFromBalancesStore(oldStoreIter.Key())
 		denom := oldStoreIter.Key()[v042auth.AddrLen:]
-		newStoreKey := append(CreateAccountBalancesPrefix(addr), denom...)
+		newStoreKey := types.CreatePrefixedAccountStoreKey(addr, denom)
 
 		// Set new key on store. Values don't change.
 		store.Set(newStoreKey, oldStoreIter.Value())
diff --git a/x/bank/migrations/v2/store_test.go b/x/bank/migrations/v2/store_test.go
index 7402425b9840..287f34626867 100644
--- a/x/bank/migrations/v2/store_test.go
+++ b/x/bank/migrations/v2/store_test.go
@@ -93,13 +93,13 @@ func TestBalanceKeysMigration(t *testing.T) {
 	err = v2bank.MigrateStore(ctx, bankKey, encCfg.Codec)
 	require.NoError(t, err)
 
-	newKey := append(types.CreateAccountBalancesPrefix(addr), []byte(fooCoin.Denom)...)
+	newKey := types.CreatePrefixedAccountStoreKey(addr, []byte(fooCoin.Denom))
 	// -7 because we replaced "balances" with 0x02,
 	// +1 because we added length-prefix to address.
 	require.Equal(t, len(oldFooKey)-7+1, len(newKey))
 	require.Nil(t, store.Get(oldFooKey))
 	require.Equal(t, fooBz, store.Get(newKey))
 
-	newKeyFooBar := append(types.CreateAccountBalancesPrefix(addr), []byte(fooBarCoin.Denom)...)
+	newKeyFooBar := types.CreatePrefixedAccountStoreKey(addr, []byte(fooBarCoin.Denom))
 	require.Nil(t, store.Get(newKeyFooBar)) // after migration zero balances pruned from store.
 }
diff --git a/x/bank/types/keys.go b/x/bank/types/keys.go
index 7fd89ac2b457..09938efc9271 100644
--- a/x/bank/types/keys.go
+++ b/x/bank/types/keys.go
@@ -68,6 +68,12 @@ func AddressAndDenomFromBalancesStore(key []byte) (sdk.AccAddress, string, error
 	return key[1 : addrBound+1], string(key[addrBound+1:]), nil
 }
 
+// CreatePrefixedAccountStoreKey returns the key for the given account and denomination.
+// This method can be used when performing an ABCI query for the balance of an account.
+func CreatePrefixedAccountStoreKey(addr []byte, denom []byte) []byte {
+	return append(CreateAccountBalancesPrefix(addr), denom...)
+}
+
 // CreateAccountBalancesPrefix creates the prefix for an account's balances.
 func CreateAccountBalancesPrefix(addr []byte) []byte {
 	return append(BalancesPrefix, address.MustLengthPrefix(addr)...)