diff --git a/contracts/split/src/error.rs b/contracts/split/src/error.rs
index 591239e..3556036 100644
--- a/contracts/split/src/error.rs
+++ b/contracts/split/src/error.rs
@@ -53,6 +53,8 @@ pub enum ContractError {
     MemoMismatch = 33,
     /// Issue #439: Creator is in cooldown after cancelling an invoice.
     CreatorCooldownActive = 31,
+    /// RBAC: Caller does not hold the required role for this entry point.
+    RoleNotHeld = 33,
     /// Issue #482: Intermediate multiplication or division overflowed i128 bounds.
     ArithmeticOverflow = 33,
     /// Issue #483: A zero-value or negative amount was passed where a positive amount is required.
diff --git a/contracts/split/src/events.rs b/contracts/split/src/events.rs
index d1c0d1a..64cb19c 100644
--- a/contracts/split/src/events.rs
+++ b/contracts/split/src/events.rs
@@ -1090,6 +1090,33 @@ pub fn creator_cooldown_set(
     );
 }
 
+/// RBAC: Emitted when an admin grants a role to an address.
+/// Topics: (split, role_grt, grantee)
+/// Data: (role_discriminant, admin)
+pub fn role_granted(env: &Env, grantee: &Address, role_discriminant: u32, admin: &Address) {
+    env.events().publish(
+        (
+            symbol_short!("split"),
+            symbol_short!("role_grt"),
+            grantee.clone(),
+        ),
+        (role_discriminant, admin.clone()),
+    );
+}
+
+/// RBAC: Emitted when an admin revokes a role from an address.
+/// Topics: (split, role_rev, grantee)
+/// Data: (role_discriminant, admin)
+pub fn role_revoked(env: &Env, grantee: &Address, role_discriminant: u32, admin: &Address) {
+    env.events().publish(
+        (
+            symbol_short!("split"),
+            symbol_short!("role_rev"),
+            grantee.clone(),
+        ),
+        (role_discriminant, admin.clone()),
+    );
+}
 /// Issue #474: Emitted when a creator cancels an open invoice and all contributors are refunded.
 /// Topics: (split, inv_cncl, invoice_id)
 /// Data: (creator, total_refunded, ledger)
diff --git a/contracts/split/src/lib.rs b/contracts/split/src/lib.rs
index eba46c7..e090e3f 100644
--- a/contracts/split/src/lib.rs
+++ b/contracts/split/src/lib.rs
@@ -72,6 +72,9 @@ use types::{
     Recipient, RebateTier, RepScore, ResolveAction, ResolveRule, SimulateReleaseResult, SplitRule,
     SubscriptionParams, TimelockAction, Tranche, TreasuryRecord, UpgradeProposal,
     LegacyInvoice, OverflowBehavior, Payment, PaymentCertificate, PaymentCommitment, PaymentProof,
+    ProtocolFeeConfig, QueuedAction, Recipient, RebateTier, RepScore, ResolveAction, ResolveRule,
+    Role, SimulateReleaseResult, SplitRule, SubscriptionParams, TimelockAction, Tranche,
+    TreasuryRecord, UpgradeProposal,
     ProtocolFeeConfig, QueuedAction, Recipient, RecipientAddress, RebateTier, RepScore, ResolveAction, ResolveRule,
     SimulateReleaseResult, SplitRule, SubscriptionParams, TimelockAction, Tranche, TreasuryRecord,
     UpgradeProposal,
@@ -211,6 +214,20 @@ fn milestone_flags_key(id: u64) -> (Symbol, u64) {
     (symbol_short!("ms_flgs"), id)
 }
 
+/// RBAC: per-(address, role) assignment flag — persistent storage.
+/// Stored as `bool`; absent key means role is not held.
+fn role_key(address: &Address, role_discriminant: u32) -> (Symbol, Address, u32) {
+    (symbol_short!("role_asn"), address.clone(), role_discriminant)
+}
+
+/// Convert a `Role` to its stable u32 discriminant used as the storage key component.
+fn role_discriminant(role: &Role) -> u32 {
+    match role {
+        Role::Admin    => 0,
+        Role::Creator  => 1,
+        Role::Operator => 2,
+        Role::Auditor  => 3,
+    }
 /// Contract-level funding progress checkpoints in basis points.
 fn funding_checkpoints_key() -> Symbol {
     symbol_short!("fnd_chk")
@@ -2043,6 +2060,39 @@ fn require_not_frozen(env: &Env) {
     assert!(!is_frozen, "contract is frozen for upgrade");
 }
 
+// ---------------------------------------------------------------------------
+// RBAC helpers
+// ---------------------------------------------------------------------------
+
+/// Return `true` when `address` holds `role` **or** holds `Role::Admin`.
+/// Admin is a super-role that implies all other roles.
+fn has_role(env: &Env, address: &Address, role: &Role) -> bool {
+    // Admin implies every role
+    let admin_disc = role_discriminant(&Role::Admin);
+    let role_disc  = role_discriminant(role);
+    env.storage()
+        .persistent()
+        .get::<_, bool>(&role_key(address, admin_disc))
+        .unwrap_or(false)
+        || env.storage()
+            .persistent()
+            .get::<_, bool>(&role_key(address, role_disc))
+            .unwrap_or(false)
+}
+
+/// Require that `caller` holds at least one of the supplied roles.
+/// Also requires `caller.require_auth()` so the call is signed.
+/// Panics with "RoleNotHeld" when no role matches.
+fn require_role(env: &Env, caller: &Address, roles: &[Role]) {
+    caller.require_auth();
+    for role in roles {
+        if has_role(env, caller, role) {
+            return;
+        }
+    }
+    panic!("RoleNotHeld");
+}
+
 // ---------------------------------------------------------------------------
 // Issue #431: Duplicate payment detection
 // ---------------------------------------------------------------------------
diff --git a/contracts/split/src/storage_keys.rs b/contracts/split/src/storage_keys.rs
index 5dd4d64..d07ec3c 100644
--- a/contracts/split/src/storage_keys.rs
+++ b/contracts/split/src/storage_keys.rs
@@ -282,6 +282,15 @@ pub fn required_memo_hash_key(invoice_id: u64) -> (Symbol, u64) { (symbol_short!
 pub fn invoice_tags_key(invoice_id: u64) -> (Symbol, u64) { (symbol_short!("inv_tags"), invoice_id) }
 
 // ---------------------------------------------------------------------------
+// RBAC: Role assignment storage
+// ---------------------------------------------------------------------------
+
+/// Per-address per-role assignment flag — persistent storage.
+/// Stored as a boolean `true`; absence means the role is not held.
+/// Key: ("role_asn", address, role_u32) where role_u32 is the Role discriminant.
+pub fn role_key(address: &Address, role_discriminant: u32) -> (Symbol, Address, u32) {
+    (symbol_short!("role_asn"), address.clone(), role_discriminant)
+}
 // Issue #474: Invoice cancellation
 // ---------------------------------------------------------------------------
 
diff --git a/contracts/split/src/types.rs b/contracts/split/src/types.rs
index 26a66c4..7fc5c14 100644
--- a/contracts/split/src/types.rs
+++ b/contracts/split/src/types.rs
@@ -142,6 +142,20 @@ pub enum AdminRole {
     Operator,
 }
 
+/// Issue RBAC: Fine-grained role assigned to an address.
+/// - Admin    : may perform any action (equivalent to SuperAdmin for RBAC gates).
+/// - Creator  : may call `create_invoice`.
+/// - Operator : may call `release` / `release_invoice`.
+/// - Auditor  : read-only; may call `get_invoice` and other query entry points.
+#[contracttype]
+#[derive(Clone, Debug, PartialEq)]
+pub enum Role {
+    Admin,
+    Creator,
+    Operator,
+    Auditor,
+}
+
 #[contracttype]
 #[derive(Clone, Debug)]
 pub struct Payment {