I am working on a table and for some reason, when I added rowspan, the border is popping out a little bit on the right side.

Is there a way I can merge the border?

<div class="row">
                <table cellpadding="5" cellspacing="3">
                    <tr class="top_box" style="background-color:#001F5B;">
                        <td>Loan<br />Amount</td>
                        <td>Term</td>
                        <td>Monthly<br />Payment</td>
                        <td>Rate</td>
                    </tr>
                     <tr class="big_box">
                        <td style="background-color:#C7DDF3;">$1,000</td>
                        <td class="blue_1">24 months</td>
                        <td class="blue_2">  <br/>$45.68<br/>   </td>
                        <td class="blue_3">8.99% APR</td>
                    </tr>
                    <tr class="big_box">
                        <td style="background-color:#C7DDF3;">$5,000</td>
                        <td class="blue_1">36 months<br/>48 months<br/>60 months</td>
                        <td class="blue_2">$158.98<br/>$124.40<br/>$103.77</td>
                        <td rowspan="3" border-collapse="collapse" class="blue_3">Includes 0.75% <br/>promotional <br/>rate discount<br/> and 0.25% <br/>rate discount<br/> for auto debit</td>
                    </tr>
                    <tr class="big_box">
                        <td style="background-color:#C7DDF3;">$15,000</td>
                        <td class="blue_1">6 months<br/>48 months<br/>60 months</td>
                        <td class="blue_2">$476.93<br/>$373.20<br/>$311.30</td>
                        <td rowspan="3" border-collapse="collapse" class="blue_3"></td>
                    </tr>
                     <tr class="big_box">
                        <td style="background-color:#C7DDF3;">$25,000</td>
                        <td class="blue_1">6 months<br/>48 months<br/>60 months</td>
                        <td class="blue_2">$794.88.93<br/>$622.01<br/>$518.84</td>
                        <td rowspan="3" border-collapse="collapse" class="blue_3"></td>
                    </tr>
                </table>