diff --git a/src/api/mod.rs b/src/api/mod.rs
index 59ed851..273f24f 100644
--- a/src/api/mod.rs
+++ b/src/api/mod.rs
@@ -29,6 +29,8 @@ mod socket;
 mod transactions;
 mod user;
 
+pub use transactions::TransactionBuilder;
+
 pub use interop::router as interop_router;
 use transactions::TARGET_NOT_FOUND;
 
diff --git a/src/model/account.rs b/src/model/account.rs
index 209cd28..4c9a9ba 100644
--- a/src/model/account.rs
+++ b/src/model/account.rs
@@ -7,6 +7,8 @@ use tokio_postgres::Row;
 use tracing::instrument;
 use uuid::{NoContext, Timestamp, Uuid};
 
+use crate::api::TransactionBuilder;
+
 use super::count;
 
 fn account_info_from_row(row: Row) -> AccountInfo {
@@ -40,9 +42,10 @@ impl Accounts {
             )
             .await?;
         let id = id.unwrap_or_else(|| Uuid::new_v7(Timestamp::now(NoContext)));
-        let balance: i64 = if id == user { 1000 * 100 } else { 0 };
-        client
-            .execute(&stmt, &[&id, &user, &name, &balance])
+        client.execute(&stmt, &[&id, &user, &name, &0i64]).await?;
+        TransactionBuilder::new(client, 1000 * 100)
+            .await?
+            .system(id, Some("Initial capital".into()))
             .await?;
         Ok(id)
     }