diff --git a/basicswap/http_server.py b/basicswap/http_server.py
index 6715ff1..aae11d3 100644
--- a/basicswap/http_server.py
+++ b/basicswap/http_server.py
@@ -398,6 +398,11 @@ class HttpHandler(BaseHTTPRequestHandler):
                 page_data['from_fee_override'] = ci_from.format_amount(ci_from.make_int(from_fee_override, r=1))
                 parsed_data['from_fee_override'] = page_data['from_fee_override']
 
+                lock_spend_tx_vsize = ci_from.xmr_swap_alock_spend_tx_vsize()
+                lock_spend_tx_fee = ci_from.make_int(ci_from.make_int(from_fee_override, r=1) * lock_spend_tx_vsize / 1000, r=1)
+                page_data['amt_from_lock_spend_tx_fee'] = ci_from.format_amount(lock_spend_tx_fee // ci_from.COIN())
+                page_data['tla_from'] = ci_from.ticker()
+
             if coin_to == Coins.XMR:
                 if b'fee_rate_to' in form_data:
                     page_data['to_fee_override'] = form_data[b'fee_rate_to'][0].decode('utf-8')
@@ -565,6 +570,10 @@ class HttpHandler(BaseHTTPRequestHandler):
             data['a_fee_rate_verify_src'] = fee_source
             data['a_fee_warn'] = xmr_offer.a_fee_rate < int_fee_rate_now
 
+            lock_spend_tx_vsize = ci_from.xmr_swap_alock_spend_tx_vsize()
+            lock_spend_tx_fee = ci_from.make_int(xmr_offer.a_fee_rate * lock_spend_tx_vsize / 1000, r=1)
+            data['amt_from_lock_spend_tx_fee'] = ci_from.format_amount(lock_spend_tx_fee // ci_from.COIN())
+
         if offer.was_sent:
             data['auto_accept'] = 'True' if offer.auto_accept_bids else 'False'
 
diff --git a/basicswap/interface_btc.py b/basicswap/interface_btc.py
index 8ae4b3e..0ae458b 100644
--- a/basicswap/interface_btc.py
+++ b/basicswap/interface_btc.py
@@ -111,6 +111,10 @@ class BTCInterface(CoinInterface):
     def compareFeeRates(a, b):
         return abs(a - b) < 20
 
+    @staticmethod
+    def xmr_swap_alock_spend_tx_vsize():
+        return 147
+
     def __init__(self, coin_settings, network):
         super().__init__()
         self.rpc_callback = make_rpc_func(coin_settings['rpcport'], coin_settings['rpcauth'], host=coin_settings['rpchost'])
@@ -409,7 +413,7 @@ class BTCInterface(CoinInterface):
 
         witness_bytes = len(script_lock)
         witness_bytes += 33  # sv, size
-        witness_bytes += 73 * 2  # 2 signatures (72 + 1 byts size)
+        witness_bytes += 73 * 2  # 2 signatures (72 + 1 byte size)
         witness_bytes += 4  # 1 empty, 1 true witness stack values
         witness_bytes += getCompactSizeLen(witness_bytes)
         vsize = self.getTxVSize(tx, add_witness_bytes=witness_bytes)
diff --git a/basicswap/interface_part.py b/basicswap/interface_part.py
index 69c42d6..cce82c1 100644
--- a/basicswap/interface_part.py
+++ b/basicswap/interface_part.py
@@ -31,6 +31,10 @@ class PARTInterface(BTCInterface):
     def txVersion():
         return 0xa0
 
+    @staticmethod
+    def xmr_swap_alock_spend_tx_vsize():
+        return 213
+
     def __init__(self, coin_settings, network):
         self.rpc_callback = make_rpc_func(coin_settings['rpcport'], coin_settings['rpcauth'], host=coin_settings['rpchost'])
         self.txoType = CTxOutPart
diff --git a/basicswap/templates/offer.html b/basicswap/templates/offer.html
index a24ec3c..9efbe74 100644
--- a/basicswap/templates/offer.html
+++ b/basicswap/templates/offer.html
@@ -42,7 +42,7 @@
 <form method="post">
 {% if data.show_bid_form %}
 <br/><h4>New Bid</h4>
-<p>You will send {{ data.amt_to }} {{ data.tla_to }} and receive {{ data.amt_from }} {{ data.tla_from }}</p>
+<p>You will send {{ data.amt_to }} {{ data.tla_to }} and receive {{ data.amt_from }} {{ data.tla_from }} (excluding {{ data.amt_from_lock_spend_tx_fee }} {{ data.tla_from }} in tx fees). </p>
 <table>
 <tr><td>Send From Address</td><td>
 <select name="addr_from">
@@ -64,7 +64,6 @@
 <input type="hidden" name="formid" value="{{ form_id }}">
 </form>
 
-
 <h4>Bids</h4>
 <table>
 <tr><th>Bid ID</th><th>Bid Amount</th><th>Bid Status</th><th>ITX Status</th><th>PTX Status</th></tr>
diff --git a/basicswap/templates/offer_confirm.html b/basicswap/templates/offer_confirm.html
index 2978859..0ba9398 100644
--- a/basicswap/templates/offer_confirm.html
+++ b/basicswap/templates/offer_confirm.html
@@ -23,15 +23,16 @@
 </select>
 </td><td>Amount From</td><td><input type="text" name="amt_from" value="{{ data.amt_from }}" readonly></td><td>The amount you will send.</td></tr>
 {% if data.swap_style == 'xmr' %}
-</td><td>Fee Rate From</td><td><input name="fee_rate_from" value="{{ data.from_fee_override }}" readonly></td><td>Fee Rate Source</td><td>{{ data.from_fee_src }}</td></tr>
-</td><td>Fee From Confirm Target</td><td><input type="number" name="fee_from_conf" min="1" max="32" value="{{ data.fee_from_conf }}" readonly></td></tr>
-</td><td>Fee From Extra Fee</td><td>
+<tr><td>Fee Rate From</td><td><input name="fee_rate_from" value="{{ data.from_fee_override }}" readonly></td><td>Fee Rate Source</td><td>{{ data.from_fee_src }}</td></tr>
+<tr><td>Fee From Confirm Target</td><td><input type="number" name="fee_from_conf" min="1" max="32" value="{{ data.fee_from_conf }}" readonly></td></tr>
+<tr><td>Fee From Increase By</td><td>
 <select name="fee_from_extra_" disabled>
 <option value="0">None</option>
 <option value="10"{% if data.fee_from_extra==10 %} selected{% endif %}>10%</option>
 <option value="50"{% if data.fee_from_extra==50 %} selected{% endif %}>50%</option>
 <option value="100"{% if data.fee_from_extra==100 %} selected{% endif %}>100%</option>
 </select></td></tr>
+<tr><td>Lock Tx Spend Fee</td><td>{{ data.amt_from_lock_spend_tx_fee }} {{ data.tla_from }}</td></tr>
 {% endif %}
 
 <tr><td>Coin To</td><td>
@@ -42,9 +43,9 @@
 </select>
 </td><td>Amount To</td><td><input type="text" name="amt_to" value="{{ data.amt_to }}" readonly></td><td>The amount you will receive.</td></tr>
 {% if data.swap_style == 'xmr' and coin_to != '6' %}
-</td><td>Fee Rate To</td><td><input name="fee_rate_to" value="{{ data.to_fee_override }}" readonly></td><td>Fee Rate Source</td><td>{{ data.to_fee_src }}</td></tr>
-</td><td>Fee To Confirm Target</td><td><input type="number" name="fee_to_conf" min="1" max="32" value="{{ data.fee_to_conf }}" readonly></td></tr>
-</td><td>Fee To Extra Fee</td><td>
+<tr><td>Fee Rate To</td><td><input name="fee_rate_to" value="{{ data.to_fee_override }}" readonly></td><td>Fee Rate Source</td><td>{{ data.to_fee_src }}</td></tr>
+<tr><td>Fee To Confirm Target</td><td><input type="number" name="fee_to_conf" min="1" max="32" value="{{ data.fee_to_conf }}" readonly></td></tr>
+<tr><td>Fee To Increase By</td><td>
 <select name="fee_to_extra_" disabled>
 <option value="0">None</option>
 <option value="10"{% if data.fee_to_extra==10 %} selected{% endif %}>10%</option>
diff --git a/basicswap/templates/offer_new_2.html b/basicswap/templates/offer_new_2.html
index bb3a229..0e03b4e 100644
--- a/basicswap/templates/offer_new_2.html
+++ b/basicswap/templates/offer_new_2.html
@@ -23,8 +23,8 @@
 </select>
 </td><td>Amount From</td><td><input type="text" name="amt_from" value="{{ data.amt_from }}" readonly></td><td>The amount you will send.</td></tr>
 {% if data.swap_style == 'xmr' %}
-</td><td>Fee From Confirm Target</td><td><input type="number" name="fee_from_conf" min="1" max="32" value="{{ data.fee_from_conf }}"></td></tr>
-</td><td>Fee From Extra Fee</td><td>
+<tr><td>Fee From Confirm Target</td><td><input type="number" name="fee_from_conf" min="1" max="32" value="{{ data.fee_from_conf }}"></td></tr>
+<tr><td>Fee From Increase By</td><td>
 <select name="fee_from_extra">
 <option value="0">None</option>
 <option value="10"{% if data.fee_from_extra==10 %} selected{% endif %}>10%</option>
@@ -41,8 +41,8 @@
 </select>
 </td><td>Amount To</td><td><input type="text" name="amt_to" value="{{ data.amt_to }}" readonly></td><td>The amount you will receive.</td></tr>
 {% if data.swap_style == 'xmr' and coin_to != '6' %}
-</td><td>Fee To Confirm Target</td><td><input type="number" name="fee_to_conf" min="1" max="32" value="{{ data.fee_to_conf }}"></td></tr>
-</td><td>Fee To Extra Fee</td><td>
+<tr><td>Fee To Confirm Target</td><td><input type="number" name="fee_to_conf" min="1" max="32" value="{{ data.fee_to_conf }}"></td></tr>
+<tr><td>Fee To Increase By</td><td>
 <select name="fee_to_extra">
 <option value="0">None</option>
 <option value="10"{% if data.fee_to_extra==10 %} selected{% endif %}>10%</option>