diff --git a/src/qt/coincontroldialog.cpp b/src/qt/coincontroldialog.cpp
--- a/src/qt/coincontroldialog.cpp
+++ b/src/qt/coincontroldialog.cpp
@@ -638,16 +638,8 @@
            "than the current dust threshold.");
 
     // how many satoshis the estimated fee can vary per byte we guess wrong
-    double dFeeVary;
-    if (payTxFee.GetFeePerK() > Amount::zero()) {
-        dFeeVary = std::max(GetRequiredFee(1000), payTxFee.GetFeePerK()) /
-                   (1000 * SATOSHI);
-    } else {
-        dFeeVary =
-            std::max(GetRequiredFee(1000),
-                     mempool.estimateSmartFee(nTxConfirmTarget).GetFeePerK()) /
-            (1000 * SATOSHI);
-    }
+    double dFeeVary = GetMinimumFee(1000, 2, mempool) / (1000 * SATOSHI);
+
     QString toolTip4 =
         tr("Can vary +/- %1 satoshi(s) per input.").arg(dFeeVary);
 
diff --git a/src/qt/sendcoinsdialog.cpp b/src/qt/sendcoinsdialog.cpp
--- a/src/qt/sendcoinsdialog.cpp
+++ b/src/qt/sendcoinsdialog.cpp
@@ -221,7 +221,8 @@
                 SLOT(updateGlobalFeeVariables()));
         connect(ui->checkBoxMinimumFee, SIGNAL(stateChanged(int)), this,
                 SLOT(coinControlUpdateLabels()));
-        ui->customFee->setSingleStep(GetRequiredFee(1000));
+
+        ui->customFee->setSingleStep(GetMinimumFee(1000, 2, mempool));
         updateFeeSectionControls();
         updateMinFeeLabel();
         updateSmartFeeLabel();
@@ -664,7 +665,7 @@
 
 void SendCoinsDialog::setMinimumFee() {
     ui->radioCustomPerKilobyte->setChecked(true);
-    ui->customFee->setValue(GetRequiredFee(1000));
+    ui->customFee->setValue(GetMinimumFee(1000, 2, mempool));
 }
 
 void SendCoinsDialog::updateFeeSectionControls() {
@@ -737,7 +738,7 @@
             tr("Pay only the required fee of %1")
                 .arg(BitcoinUnits::formatWithUnit(
                          model->getOptionsModel()->getDisplayUnit(),
-                         GetRequiredFee(1000)) +
+                         GetMinimumFee(1000, 2, mempool)) +
                      "/kB"));
 }
 
@@ -755,7 +756,7 @@
             BitcoinUnits::formatWithUnit(
                 model->getOptionsModel()->getDisplayUnit(),
                 std::max(CWallet::fallbackFee.GetFeePerK(),
-                         GetRequiredFee(1000))) +
+                         GetMinimumFee(1000, 2, mempool))) +
             "/kB");
         // (Smart fee not initialized yet. This usually takes a few blocks...)
         ui->labelSmartFee2->show();
@@ -764,7 +765,8 @@
         ui->labelSmartFee->setText(
             BitcoinUnits::formatWithUnit(
                 model->getOptionsModel()->getDisplayUnit(),
-                std::max(feeRate.GetFeePerK(), GetRequiredFee(1000))) +
+                std::max(feeRate.GetFeePerK(),
+                         GetMinimumFee(1000, 2, mempool))) +
             "/kB");
         ui->labelSmartFee2->hide();
         ui->labelFeeEstimation->setText(
diff --git a/src/wallet/fees.h b/src/wallet/fees.h
--- a/src/wallet/fees.h
+++ b/src/wallet/fees.h
@@ -15,12 +15,6 @@
 class CTxMemPool;
 struct FeeCalculation;
 
-/**
- * Return the minimum required fee taking into account the
- * floating relay fee and user set minimum transaction fee
- */
-Amount GetRequiredFee(unsigned int nTxBytes);
-
 /**
  * Estimate the minimum fee considering user set parameters
  * and the required fee
diff --git a/src/wallet/fees.cpp b/src/wallet/fees.cpp
--- a/src/wallet/fees.cpp
+++ b/src/wallet/fees.cpp
@@ -13,11 +13,6 @@
 #include "wallet/coincontrol.h"
 #include "wallet/wallet.h"
 
-Amount GetRequiredFee(unsigned int nTxBytes) {
-    return std::max(CWallet::minTxFee.GetFee(nTxBytes),
-                    GetConfig().GetMinFeePerKB().GetFee(nTxBytes));
-}
-
 Amount GetMinimumFee(unsigned int nTxBytes, unsigned int nConfirmTarget,
                      const CTxMemPool &pool, Amount targetFee) {
     Amount nFeeNeeded = targetFee;
@@ -34,7 +29,8 @@
     }
 
     // Prevent user from paying a fee below minRelayTxFee or minTxFee.
-    nFeeNeeded = std::max(nFeeNeeded, GetRequiredFee(nTxBytes));
+    nFeeNeeded =
+        std::max(nFeeNeeded, GetConfig().GetMinFeePerKB().GetFee(nTxBytes));
 
     // But always obey the maximum.
     if (nFeeNeeded > maxTxFee) {
diff --git a/src/wallet/init.cpp b/src/wallet/init.cpp
--- a/src/wallet/init.cpp
+++ b/src/wallet/init.cpp
@@ -26,11 +26,6 @@
         strprintf(_("A fee rate (in %s/kB) that will be used when fee "
                     "estimation has insufficient data (default: %s)"),
                   CURRENCY_UNIT, FormatMoney(DEFAULT_FALLBACK_FEE)));
-    strUsage += HelpMessageOpt(
-        "-mintxfee=<amt>",
-        strprintf(_("Fees (in %s/kB) smaller than this are considered zero fee "
-                    "for transaction creation (default: %s)"),
-                  CURRENCY_UNIT, FormatMoney(DEFAULT_TRANSACTION_MINFEE)));
     strUsage += HelpMessageOpt(
         "-paytxfee=<amt>",
         strprintf(
@@ -185,23 +180,6 @@
             _("The wallet will avoid paying less than the minimum relay fee."));
     }
 
-    if (gArgs.IsArgSet("-mintxfee")) {
-        Amount n = Amount::zero();
-        auto parsed = ParseMoney(gArgs.GetArg("-mintxfee", ""), n);
-        if (!parsed || Amount::zero() == n) {
-            return InitError(
-                AmountErrMsg("mintxfee", gArgs.GetArg("-mintxfee", "")));
-        }
-
-        if (n > HIGH_TX_FEE_PER_KB) {
-            InitWarning(AmountHighWarn("-mintxfee") + " " +
-                        _("This is the minimum transaction fee you pay on "
-                          "every transaction."));
-        }
-
-        CWallet::minTxFee = CFeeRate(n);
-    }
-
     if (gArgs.IsArgSet("-fallbackfee")) {
         Amount nFeePerK = Amount::zero();
         if (!ParseMoney(gArgs.GetArg("-fallbackfee", ""), nFeePerK)) {
diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
--- a/src/wallet/wallet.h
+++ b/src/wallet/wallet.h
@@ -46,8 +46,6 @@
 static const Amount DEFAULT_TRANSACTION_FEE = Amount::zero();
 //! -fallbackfee default
 static const Amount DEFAULT_FALLBACK_FEE(20000 * SATOSHI);
-//! -mintxfee default
-static const Amount DEFAULT_TRANSACTION_MINFEE(1000 * SATOSHI);
 //! minimum recommended increment for BIP 125 replacement txs
 static const Amount WALLET_INCREMENTAL_RELAY_FEE(5000 * SATOSHI);
 //! target minimum change amount
@@ -952,7 +950,6 @@
     template <typename ContainerType>
     bool DummySignTx(CMutableTransaction &txNew, const ContainerType &coins);
 
-    static CFeeRate minTxFee;
     static CFeeRate fallbackFee;
 
     bool NewKeyPool();
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -47,13 +47,6 @@
 const char *DEFAULT_WALLET_DAT = "wallet.dat";
 const uint32_t BIP32_HARDENED_KEY_LIMIT = 0x80000000;
 
-/**
- * Fees smaller than this (in satoshi) are considered zero fee (for transaction
- * creation)
- * Override with -mintxfee
- */
-CFeeRate CWallet::minTxFee = CFeeRate(DEFAULT_TRANSACTION_MINFEE);
-
 /**
  * If fee estimation does not have enough data to provide estimates, use this
  * fee instead. Has no effect if not using fee estimation.