diff --git a/src/qt/forms/sendcoinsdialog.ui b/src/qt/forms/sendcoinsdialog.ui
--- a/src/qt/forms/sendcoinsdialog.ui
+++ b/src/qt/forms/sendcoinsdialog.ui
@@ -856,28 +856,15 @@
                <item>
                 <layout class="QHBoxLayout" name="horizontalLayoutFee8">
                  <item>
-                  <widget class="QCheckBox" name="checkBoxMinimumFee">
-                   <property name="toolTip">
-                    <string>Paying only the minimum fee is just fine as long as there is less transaction volume than space in the blocks. But be aware that this can end up in a never confirming transaction once there is more demand for bitcoin transactions than the network can process.</string>
-                   </property>
-                   <property name="text">
-                    <string/>
-                   </property>
-                  </widget>
-                 </item>
-                 <item>
-                  <widget class="QLabel" name="labelMinFeeWarning">
+                  <widget class="QLabel" name="labelCustomFeeWarning">
                    <property name="enabled">
                     <bool>true</bool>
                    </property>
                    <property name="toolTip">
-                    <string>Paying only the minimum fee is just fine as long as there is less transaction volume than space in the blocks. But be aware that this can end up in a never confirming transaction once there is more demand for bitcoin transactions than the network can process.</string>
+                    <string>When there is less transaction volume than space in the blocks, miners as well as relaying nodes may enforce a minimum fee. Paying only this minimum fee is just fine, but be aware that this can result in a never confirming transaction once there is more demand for bitcoin transactions than the network can process.</string>
                    </property>
                    <property name="text">
-                    <string>(read the tooltip)</string>
-                   </property>
-                   <property name="margin">
-                    <number>5</number>
+                    <string>A too low fee might result in a never confirming transaction (read the tooltip)</string>
                    </property>
                   </widget>
                  </item>
@@ -970,9 +957,6 @@
                    <property name="text">
                     <string/>
                    </property>
-                   <property name="margin">
-                    <number>2</number>
-                   </property>
                   </widget>
                  </item>
                  <item>
@@ -987,9 +971,6 @@
                    <property name="text">
                     <string>(Smart fee not initialized yet. This usually takes a few blocks...)</string>
                    </property>
-                   <property name="margin">
-                    <number>2</number>
-                   </property>
                   </widget>
                  </item>
                  <item>
diff --git a/src/qt/sendcoinsdialog.h b/src/qt/sendcoinsdialog.h
--- a/src/qt/sendcoinsdialog.h
+++ b/src/qt/sendcoinsdialog.h
@@ -101,9 +101,7 @@
     void coinControlClipboardBytes();
     void coinControlClipboardLowOutput();
     void coinControlClipboardChange();
-    void setMinimumFee();
     void updateFeeSectionControls();
-    void updateMinFeeLabel();
     void updateSmartFeeLabel();
 
 Q_SIGNALS:
diff --git a/src/qt/sendcoinsdialog.cpp b/src/qt/sendcoinsdialog.cpp
--- a/src/qt/sendcoinsdialog.cpp
+++ b/src/qt/sendcoinsdialog.cpp
@@ -116,19 +116,15 @@
         settings.setValue("nTransactionFee",
                           qint64(DEFAULT_PAY_TX_FEE / SATOSHI));
     }
-    if (!settings.contains("fPayOnlyMinFee")) {
-        settings.setValue("fPayOnlyMinFee", false);
-    }
     ui->groupFee->setId(ui->radioSmartFee, 0);
     ui->groupFee->setId(ui->radioCustomFee, 1);
     ui->groupFee
         ->button(
             std::max<int>(0, std::min(1, settings.value("nFeeRadio").toInt())))
         ->setChecked(true);
+    ui->customFee->SetAllowEmpty(false);
     ui->customFee->setValue(
         int64_t(settings.value("nTransactionFee").toLongLong()) * SATOSHI);
-    ui->checkBoxMinimumFee->setChecked(
-        settings.value("fPayOnlyMinFee").toBool());
     minimizeFeeSection(settings.value("fFeeSectionMinimized").toBool());
 
     // Set the model properly.
@@ -190,16 +186,13 @@
                 &SendCoinsDialog::coinControlUpdateLabels);
         connect(ui->customFee, &BitcoinAmountField::valueChanged, this,
                 &SendCoinsDialog::coinControlUpdateLabels);
-        connect(ui->checkBoxMinimumFee, &QCheckBox::stateChanged, this,
-                &SendCoinsDialog::setMinimumFee);
-        connect(ui->checkBoxMinimumFee, &QCheckBox::stateChanged, this,
-                &SendCoinsDialog::updateFeeSectionControls);
-        connect(ui->checkBoxMinimumFee, &QCheckBox::stateChanged, this,
-                &SendCoinsDialog::coinControlUpdateLabels);
-
-        ui->customFee->setSingleStep(model->wallet().getRequiredFee(1000));
+        Amount requiredFee = model->wallet().getRequiredFee(1000);
+        ui->customFee->SetMinValue(requiredFee);
+        if (ui->customFee->value() < requiredFee) {
+            ui->customFee->setValue(requiredFee);
+        }
+        ui->customFee->setSingleStep(requiredFee);
         updateFeeSectionControls();
-        updateMinFeeLabel();
         updateSmartFeeLabel();
 
         if (model->wallet().privateKeysDisabled()) {
@@ -219,7 +212,6 @@
     settings.setValue("nFeeRadio", ui->groupFee->checkedId());
     settings.setValue("nTransactionFee",
                       qint64(ui->customFee->value() / SATOSHI));
-    settings.setValue("fPayOnlyMinFee", ui->checkBoxMinimumFee->isChecked());
 
     delete ui;
 }
@@ -656,7 +648,6 @@
 void SendCoinsDialog::updateDisplayUnit() {
     setBalance(model->wallet().getBalances());
     ui->customFee->setDisplayUnit(model->getOptionsModel()->getDisplayUnit());
-    updateMinFeeLabel();
     updateSmartFeeLabel();
 }
 
@@ -761,21 +752,13 @@
     }
 }
 
-void SendCoinsDialog::setMinimumFee() {
-    ui->customFee->setValue(model->wallet().getRequiredFee(1000));
-}
-
 void SendCoinsDialog::updateFeeSectionControls() {
     ui->labelSmartFee->setEnabled(ui->radioSmartFee->isChecked());
     ui->labelSmartFee2->setEnabled(ui->radioSmartFee->isChecked());
     ui->labelFeeEstimation->setEnabled(ui->radioSmartFee->isChecked());
-    ui->checkBoxMinimumFee->setEnabled(ui->radioCustomFee->isChecked());
-    ui->labelMinFeeWarning->setEnabled(ui->radioCustomFee->isChecked());
-    ui->labelCustomPerKilobyte->setEnabled(
-        ui->radioCustomFee->isChecked() &&
-        !ui->checkBoxMinimumFee->isChecked());
-    ui->customFee->setEnabled(ui->radioCustomFee->isChecked() &&
-                              !ui->checkBoxMinimumFee->isChecked());
+    ui->labelCustomFeeWarning->setEnabled(ui->radioCustomFee->isChecked());
+    ui->labelCustomPerKilobyte->setEnabled(ui->radioCustomFee->isChecked());
+    ui->customFee->setEnabled(ui->radioCustomFee->isChecked());
 }
 
 void SendCoinsDialog::updateFeeMinimizedLabel() {
@@ -794,17 +777,6 @@
     }
 }
 
-void SendCoinsDialog::updateMinFeeLabel() {
-    if (model && model->getOptionsModel()) {
-        ui->checkBoxMinimumFee->setText(
-            tr("Pay only the required fee of %1")
-                .arg(BitcoinUnits::formatWithUnit(
-                         model->getOptionsModel()->getDisplayUnit(),
-                         model->wallet().getRequiredFee(1000)) +
-                     "/kB"));
-    }
-}
-
 void SendCoinsDialog::updateCoinControlState(CCoinControl &ctrl) {
     if (ui->radioCustomFee->isChecked()) {
         ctrl.m_feerate = CFeeRate(ui->customFee->value());