diff --git a/Cargo.lock b/Cargo.lock
index dc69fdc2768e31..0bde7bd8798db9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -9791,6 +9791,7 @@ dependencies = [
  "solana-rpc-client-api",
  "solana-runtime",
  "solana-runtime-transaction",
+ "solana-sdk-ids",
  "solana-send-transaction-service",
  "solana-sha256-hasher",
  "solana-signature",
diff --git a/rpc/Cargo.toml b/rpc/Cargo.toml
index e4501fcb9e3989..b48c44fd9dcb61 100644
--- a/rpc/Cargo.toml
+++ b/rpc/Cargo.toml
@@ -110,6 +110,7 @@ solana-runtime = { workspace = true, features = ["dev-context-only-utils"] }
 solana-runtime-transaction = { workspace = true, features = [
     "dev-context-only-utils",
 ] }
+solana-sdk-ids = { workspace = true }
 solana-send-transaction-service = { workspace = true, features = ["dev-context-only-utils"] }
 solana-sha256-hasher = { workspace = true }
 solana-stake-interface = { workspace = true }
diff --git a/rpc/src/rpc.rs b/rpc/src/rpc.rs
index ba5dcdecb0a009..1464a290e6c943 100644
--- a/rpc/src/rpc.rs
+++ b/rpc/src/rpc.rs
@@ -4547,12 +4547,14 @@ pub mod tests {
             commitment::{BlockCommitment, CommitmentSlots},
             non_circulating_supply::non_circulating_accounts,
         },
+        solana_sdk_ids::bpf_loader_upgradeable,
         solana_send_transaction_service::{
             tpu_info::NullTpuInfo,
             transaction_client::{ConnectionCacheClient, TpuClientNextClient},
         },
         solana_sha256_hasher::hash,
         solana_signer::Signer,
+        solana_svm::account_loader::TRANSACTION_ACCOUNT_BASE_SIZE,
         solana_system_interface::{instruction as system_instruction, program as system_program},
         solana_system_transaction as system_transaction,
         solana_sysvar::slot_hashes::SlotHashes,
@@ -4629,6 +4631,22 @@ pub mod tests {
         }
     }
 
+    fn expected_loaded_accounts_data_size(bank: &Bank, tx: &Transaction) -> u32 {
+        let mut loaded_accounts_data_size = 0;
+        for key in tx.message.account_keys.iter() {
+            if let Some(account) = bank.get_account(key) {
+                assert!(
+                    *account.owner() != bpf_loader_upgradeable::id(),
+                    "LoaderV3 is not supported; to add it, parse the program account and add its programdata size.",
+                );
+                loaded_accounts_data_size +=
+                    (account.data().len() + TRANSACTION_ACCOUNT_BASE_SIZE) as u32;
+            }
+        }
+
+        loaded_accounts_data_size
+    }
+
     fn test_builtin_processor(
         invoke_context: &mut InvokeContext,
     ) -> std::result::Result<u64, Box<dyn std::error::Error>> {
@@ -5975,11 +5993,7 @@ pub mod tests {
         // Simulation bank must be frozen
         bank.freeze();
 
-        let loaded_account_data_size = bank
-            .get_account(&system_program::id())
-            .unwrap()
-            .data()
-            .len() as u32;
+        let loaded_accounts_data_size = expected_loaded_accounts_data_size(&bank, &tx);
 
         // Good signature with sigVerify=true
         let req = format!(
@@ -6020,7 +6034,7 @@ pub mod tests {
                     ],
                     "err":null,
                     "innerInstructions": null,
-                    "loadedAccountsDataSize": loaded_account_data_size,
+                    "loadedAccountsDataSize": loaded_accounts_data_size,
                     "logs":[
                         "Program 11111111111111111111111111111111 invoke [1]",
                         "Program 11111111111111111111111111111111 success"
@@ -6107,7 +6121,7 @@ pub mod tests {
                     "accounts":null,
                     "err":null,
                     "innerInstructions":null,
-                    "loadedAccountsDataSize": loaded_account_data_size,
+                    "loadedAccountsDataSize": loaded_accounts_data_size,
                     "logs":[
                         "Program 11111111111111111111111111111111 invoke [1]",
                         "Program 11111111111111111111111111111111 success"
@@ -6138,7 +6152,7 @@ pub mod tests {
                     "accounts":null,
                     "err":null,
                     "innerInstructions":null,
-                    "loadedAccountsDataSize": loaded_account_data_size,
+                    "loadedAccountsDataSize": loaded_accounts_data_size,
                     "logs":[
                         "Program 11111111111111111111111111111111 invoke [1]",
                         "Program 11111111111111111111111111111111 success"
@@ -6227,7 +6241,7 @@ pub mod tests {
                     "accounts":null,
                     "err":null,
                     "innerInstructions":null,
-                    "loadedAccountsDataSize": loaded_account_data_size,
+                    "loadedAccountsDataSize": loaded_accounts_data_size,
                     "logs":[
                         "Program 11111111111111111111111111111111 invoke [1]",
                         "Program 11111111111111111111111111111111 success"
@@ -6320,16 +6334,7 @@ pub mod tests {
         // Simulation bank must be frozen
         bank.freeze();
 
-        let loaded_accounts_data_size = bank
-            .get_account(&token_account_pubkey)
-            .unwrap()
-            .data()
-            .len() as u32
-            + bank
-                .get_account(&system_program::id())
-                .unwrap()
-                .data()
-                .len() as u32;
+        let loaded_accounts_data_size = expected_loaded_accounts_data_size(&bank, &tx);
 
         let req = format!(
             r#"{{"jsonrpc":"2.0",
@@ -6444,16 +6449,7 @@ pub mod tests {
         // Simulation bank must be frozen
         bank.freeze();
 
-        let loaded_accounts_data_size = bank
-            .get_account(&TestBuiltinEntrypoint::PROGRAM_ID)
-            .unwrap()
-            .data()
-            .len() as u32
-            + bank
-                .get_account(&system_program::id())
-                .unwrap()
-                .data()
-                .len() as u32;
+        let loaded_accounts_data_size = expected_loaded_accounts_data_size(&bank, &tx);
 
         // `innerInstructions` not provided, should not be in response
         let req = format!(
diff --git a/svm/src/account_loader.rs b/svm/src/account_loader.rs
index e3a834344c911f..8608a8d4dad311 100644
--- a/svm/src/account_loader.rs
+++ b/svm/src/account_loader.rs
@@ -1,5 +1,5 @@
 #[cfg(feature = "dev-context-only-utils")]
-use qualifier_attr::field_qualifiers;
+use qualifier_attr::{field_qualifiers, qualifiers};
 use {
     crate::{
         account_overrides::AccountOverrides, nonce_info::NonceInfo,
@@ -39,6 +39,7 @@ use {
 
 // Per SIMD-0186, all accounts are assigned a base size of 64 bytes to cover
 // the storage cost of metadata.
+#[cfg_attr(feature = "dev-context-only-utils", qualifiers(pub))]
 pub(crate) const TRANSACTION_ACCOUNT_BASE_SIZE: usize = 64;
 
 // Per SIMD-0186, resolved address lookup tables are assigned a base size of 8248