diff --git a/src/primitives/transaction.h b/src/primitives/transaction.h
--- a/src/primitives/transaction.h
+++ b/src/primitives/transaction.h
@@ -272,10 +272,6 @@
     // size)
     unsigned int CalculateModifiedSize(unsigned int nTxSize = 0) const;
 
-    // Computes an adjusted tx size so that the UTXIs are billed partially
-    // upfront.
-    size_t GetBillableSize() const;
-
     /**
      * Get the total transaction size in bytes.
      * @return Total transaction size in bytes
diff --git a/src/primitives/transaction.cpp b/src/primitives/transaction.cpp
--- a/src/primitives/transaction.cpp
+++ b/src/primitives/transaction.cpp
@@ -113,10 +113,6 @@
     return nTxSize;
 }
 
-size_t CTransaction::GetBillableSize() const {
-    return ::GetSerializeSize(*this, SER_NETWORK, PROTOCOL_VERSION);
-}
-
 unsigned int CTransaction::GetTotalSize() const {
     return ::GetSerializeSize(*this, SER_NETWORK, PROTOCOL_VERSION);
 }
diff --git a/src/test/transaction_tests.cpp b/src/test/transaction_tests.cpp
--- a/src/test/transaction_tests.cpp
+++ b/src/test/transaction_tests.cpp
@@ -794,24 +794,4 @@
     BOOST_CHECK_EQUAL(state.GetRejectReason(), "bad-txns-undersize");
 }
 
-BOOST_AUTO_TEST_CASE(tx_transaction_fee) {
-    std::vector<size_t> sizes = {1, 2, 4, 8, 16, 32, 64, 128, 256, 512};
-    for (size_t inputs : sizes) {
-        for (size_t outputs : sizes) {
-            CMutableTransaction mtx;
-            mtx.vin.resize(inputs);
-            mtx.vout.resize(outputs);
-            CTransaction tx(mtx);
-            auto txBillableSize = tx.GetBillableSize();
-            auto txSize = tx.GetTotalSize();
-            BOOST_CHECK(txBillableSize > 0);
-            if (inputs > outputs) {
-                BOOST_CHECK(txBillableSize <= txSize);
-            } else {
-                BOOST_CHECK(txBillableSize >= txSize);
-            }
-        }
-    }
-}
-
 BOOST_AUTO_TEST_SUITE_END()