diff --git a/src.ts/providers/provider-etherscan-base.ts b/src.ts/providers/provider-etherscan-base.ts
index 3153221fa..e85b218ef 100644
--- a/src.ts/providers/provider-etherscan-base.ts
+++ b/src.ts/providers/provider-etherscan-base.ts
@@ -274,6 +274,14 @@ export class BaseEtherscanProvider extends AbstractProvider {
             }
         }
 
+        if (req.method === "estimateGas") {
+            if (!message.match(/revert/i) && message.match(/insufficient funds/i)) {
+                assert(false, "insufficient funds", "INSUFFICIENT_FUNDS", {
+                    transaction: req.transaction
+                });
+            }
+        }
+
         if (req.method === "call" || req.method === "estimateGas") {
             if (message.match(/execution reverted/i)) {
                 let data = "";
@@ -287,7 +295,6 @@ export class BaseEtherscanProvider extends AbstractProvider {
             }
         }
 
-
         if (message) {
             if (req.method === "broadcastTransaction") {
                 const transaction = Transaction.from(req.signedTransaction);
diff --git a/src.ts/providers/provider-jsonrpc.ts b/src.ts/providers/provider-jsonrpc.ts
index 423631f8c..e73c57233 100644
--- a/src.ts/providers/provider-jsonrpc.ts
+++ b/src.ts/providers/provider-jsonrpc.ts
@@ -787,6 +787,15 @@ export abstract class JsonRpcApiProvider extends AbstractProvider {
         const { method } = payload;
         const { error } = _error;
 
+        if (method === "eth_estimateGas" && error.message) {
+            const msg = error.message;
+            if (!msg.match(/revert/i) && msg.match(/insufficient funds/i)) {
+                return makeError("insufficient funds", "INSUFFICIENT_FUNDS", {
+                    transaction: ((<any>payload).params[0]),
+                });
+            }
+        }
+
         if (method === "eth_call" || method === "eth_estimateGas") {
             const result = spelunkData(error);