diff --git a/src/wallet/bdb.h b/src/wallet/bdb.h
--- a/src/wallet/bdb.h
+++ b/src/wallet/bdb.h
@@ -158,6 +158,7 @@
         return (env->Directory() / strFile).string();
     }
 
+    std::string Format() override { return "bdb"; }
     /**
      * Pointer to shared database environment.
      *
diff --git a/src/wallet/db.h b/src/wallet/db.h
--- a/src/wallet/db.h
+++ b/src/wallet/db.h
@@ -154,6 +154,8 @@
     /** Return path to main database file for logs and error messages. */
     virtual std::string Filename() = 0;
 
+    virtual std::string Format() = 0;
+
     std::atomic<unsigned int> nUpdateCounter;
     unsigned int nLastSeen;
     unsigned int nLastFlushed;
@@ -209,6 +211,7 @@
     void IncrementUpdateCounter() override { ++nUpdateCounter; }
     void ReloadDbEnv() override {}
     std::string Filename() override { return "dummy"; }
+    std::string Format() override { return "dummy"; }
     std::unique_ptr<DatabaseBatch>
     MakeBatch(bool flush_on_close = true) override {
         return std::make_unique<DummyBatch>();
diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -3013,6 +3013,8 @@
                 {RPCResult::Type::NUM, "walletversion", "the wallet version"},
                 {RPCResult::Type::STR_AMOUNT, "balance",
                  "DEPRECATED. Identical to getbalances().mine.trusted"},
+                {RPCResult::Type::STR, "format",
+                 "the database format (bdb or sqlite)"},
                 {RPCResult::Type::STR_AMOUNT, "unconfirmed_balance",
                  "DEPRECATED. Identical to "
                  "getbalances().mine.untrusted_pending"},
@@ -3088,6 +3090,7 @@
             int64_t kp_oldest = pwallet->GetOldestKeyPoolTime();
             obj.pushKV("walletname", pwallet->GetName());
             obj.pushKV("walletversion", pwallet->GetVersion());
+            obj.pushKV("format", pwallet->GetDatabase().Format());
             obj.pushKV("balance", bal.m_mine_trusted);
             obj.pushKV("unconfirmed_balance", bal.m_mine_untrusted_pending);
             obj.pushKV("immature_balance", bal.m_mine_immature);
diff --git a/src/wallet/scriptpubkeyman.h b/src/wallet/scriptpubkeyman.h
--- a/src/wallet/scriptpubkeyman.h
+++ b/src/wallet/scriptpubkeyman.h
@@ -35,7 +35,7 @@
 public:
     virtual ~WalletStorage() = default;
     virtual const std::string GetDisplayName() const = 0;
-    virtual WalletDatabase &GetDatabase() = 0;
+    virtual WalletDatabase &GetDatabase() const = 0;
     virtual const CChainParams &GetChainParams() const = 0;
     virtual bool IsWalletFlagSet(uint64_t) const = 0;
     virtual void UnsetBlankWalletFlag(WalletBatch &) = 0;
diff --git a/src/wallet/sqlite.h b/src/wallet/sqlite.h
--- a/src/wallet/sqlite.h
+++ b/src/wallet/sqlite.h
@@ -106,6 +106,7 @@
     void IncrementUpdateCounter() override { ++nUpdateCounter; }
 
     std::string Filename() override { return m_file_path; }
+    std::string Format() override { return "sqlite"; }
 
     /** Make a SQLiteBatch connected to this database */
     std::unique_ptr<DatabaseBatch>
diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
--- a/src/wallet/wallet.h
+++ b/src/wallet/wallet.h
@@ -823,7 +823,7 @@
      * be necessary.
      */
     WalletDatabase &GetDBHandle() { return *database; }
-    WalletDatabase &GetDatabase() override { return *database; }
+    WalletDatabase &GetDatabase() const override { return *database; }
 
     /**
      * Select a set of coins such that nValueRet >= nTargetValue and at least
diff --git a/test/functional/wallet_descriptor.py b/test/functional/wallet_descriptor.py
--- a/test/functional/wallet_descriptor.py
+++ b/test/functional/wallet_descriptor.py
@@ -18,6 +18,9 @@
         self.skip_if_no_wallet()
 
     def run_test(self):
+        wallet_info = self.nodes[0].getwalletinfo()
+        assert_equal(wallet_info['format'], 'bdb')
+
         # Make a descriptor wallet
         self.log.info("Making a descriptor wallet")
         self.nodes[0].createwallet(wallet_name="desc1", descriptors=True)
@@ -26,6 +29,7 @@
         # A descriptor wallet should have 100 addresses = 100 keys
         self.log.info("Checking wallet info")
         wallet_info = self.nodes[0].getwalletinfo()
+        assert_equal(wallet_info['format'], 'bdb')
         assert_equal(wallet_info['keypoolsize'], 100)
         assert_equal(wallet_info['keypoolsize_hd_internal'], 100)
         assert 'keypoololdest' not in wallet_info