diff --git a/components/brave_rewards/browser/rewards_p3a.cc b/components/brave_rewards/browser/rewards_p3a.cc
index 5b19a420f58b..191d048f33b0 100644
--- a/components/brave_rewards/browser/rewards_p3a.cc
+++ b/components/brave_rewards/browser/rewards_p3a.cc
@@ -154,7 +154,7 @@ void RecordRewardsDisabledForSomeMetrics() {
 
 
 double CalcWalletBalanceForP3A(base::flat_map<std::string, double> wallets,
-                               std::string user_funds) {
+                               double user_funds) {
   double balance_minus_grant = 0.0;
   for (const auto& wallet : wallets) {
     // Skip anonymous wallet, since it can contain grants.
@@ -166,9 +166,7 @@ double CalcWalletBalanceForP3A(base::flat_map<std::string, double> wallets,
 
   // `user_funds` is the amount of user-funded BAT
   // in the anonymous wallet (ex: not grants).
-  double user_funds_value;
-  balance_minus_grant +=
-      base::StringToDouble(user_funds, &user_funds_value);
+  balance_minus_grant += user_funds;
   return balance_minus_grant;
 }
 
diff --git a/components/brave_rewards/browser/rewards_p3a.h b/components/brave_rewards/browser/rewards_p3a.h
index 5ab8c075c5d3..f726404addf9 100644
--- a/components/brave_rewards/browser/rewards_p3a.h
+++ b/components/brave_rewards/browser/rewards_p3a.h
@@ -63,7 +63,7 @@ void RecordNoWalletCreatedForAllMetrics();
 void RecordRewardsDisabledForSomeMetrics();
 
 double CalcWalletBalanceForP3A(base::flat_map<std::string, double> wallets,
-                               std::string user_funds);
+                               double user_funds);
 
 uint64_t RoundProbiToUint64(base::StringPiece probi);
 
diff --git a/vendor/bat-native-ledger/include/bat/ledger/public/interfaces/ledger.mojom b/vendor/bat-native-ledger/include/bat/ledger/public/interfaces/ledger.mojom
index 02057012dbff..c634b4ac83fa 100644
--- a/vendor/bat-native-ledger/include/bat/ledger/public/interfaces/ledger.mojom
+++ b/vendor/bat-native-ledger/include/bat/ledger/public/interfaces/ledger.mojom
@@ -122,7 +122,7 @@ struct RewardsParameters {
 
 struct Balance {
   double total;
-  string user_funds;
+  double user_funds;
   map<string, double> wallets;
 };
 
diff --git a/vendor/bat-native-ledger/src/bat/ledger/internal/wallet/wallet_balance.cc b/vendor/bat-native-ledger/src/bat/ledger/internal/wallet/wallet_balance.cc
index be029b24cc86..7fec980761c1 100644
--- a/vendor/bat-native-ledger/src/bat/ledger/internal/wallet/wallet_balance.cc
+++ b/vendor/bat-native-ledger/src/bat/ledger/internal/wallet/wallet_balance.cc
@@ -35,7 +35,6 @@ void WalletBalance::Fetch(ledger::FetchBalanceCallback callback) {
   // we can skip balance server ping
   if (!braveledger_state::GetFetchOldBalanceEnabled(ledger_)) {
     auto balance = ledger::Balance::New();
-    balance->user_funds = "0";
     GetUnblindedTokens(std::move(balance), callback);
     return;
   }
diff --git a/vendor/bat-native-ledger/src/bat/ledger/internal/wallet/wallet_claim.cc b/vendor/bat-native-ledger/src/bat/ledger/internal/wallet/wallet_claim.cc
index a217744a52cf..488bef1344e4 100644
--- a/vendor/bat-native-ledger/src/bat/ledger/internal/wallet/wallet_claim.cc
+++ b/vendor/bat-native-ledger/src/bat/ledger/internal/wallet/wallet_claim.cc
@@ -11,6 +11,7 @@
 
 #include "base/base64.h"
 #include "base/json/json_writer.h"
+#include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "base/values.h"
 #include "bat/ledger/internal/common/security_helper.h"
@@ -28,14 +29,12 @@ using std::placeholders::_2;
 namespace {
 
 std::string GeneratePayload(
-    const std::string& user_funds,
+    const double user_funds,
     const std::string& address,
     const std::string& anon_address,
     const std::vector<uint8_t>& seed) {
-  const std::string amount = user_funds.empty() ? "0" : user_funds;
-
   base::Value denomination(base::Value::Type::DICTIONARY);
-  denomination.SetStringKey("amount", amount);
+  denomination.SetStringKey("amount", base::NumberToString(user_funds));
   denomination.SetStringKey("currency", "BAT");
 
   base::Value octets(base::Value::Type::DICTIONARY);
@@ -109,7 +108,7 @@ void WalletClaim::OnBalance(
   }
 
   if (ledger_->GetBooleanState(ledger::kStateAnonTransferChecked) &&
-      balance->user_funds == "0") {
+      balance->user_funds == 0) {
     BLOG(1, "Second ping with zero balance");
     callback(ledger::Result::LEDGER_OK);
     return;
@@ -144,7 +143,7 @@ void WalletClaim::OnBalance(
 
 void WalletClaim::TransferFunds(
     const ledger::Result result,
-    const std::string user_funds,
+    const double user_funds,
     ledger::ResultCallback callback) {
   auto wallets = ledger_->GetExternalWallets();
   auto wallet_ptr = braveledger_uphold::GetWallet(std::move(wallets));
diff --git a/vendor/bat-native-ledger/src/bat/ledger/internal/wallet/wallet_claim.h b/vendor/bat-native-ledger/src/bat/ledger/internal/wallet/wallet_claim.h
index abdddd9cd4a4..e46686c2b7d9 100644
--- a/vendor/bat-native-ledger/src/bat/ledger/internal/wallet/wallet_claim.h
+++ b/vendor/bat-native-ledger/src/bat/ledger/internal/wallet/wallet_claim.h
@@ -33,7 +33,7 @@ class WalletClaim {
 
   void TransferFunds(
       const ledger::Result result,
-      const std::string user_funds,
+      const double user_funds,
       ledger::ResultCallback callback);
 
   void OnTransferFunds(