diff --git a/src/accounting/static/js/summary-helper.js b/src/accounting/static/js/summary-helper.js
index 08e3b56..503cc79 100644
--- a/src/accounting/static/js/summary-helper.js
+++ b/src/accounting/static/js/summary-helper.js
@@ -78,6 +78,7 @@ class SummaryHelper {
         this.#initializeGeneralTripHelper();
         this.#initializeBusTripHelper();
         this.#initializeNumberHelper();
+        this.#initializeSuggestedAccounts();
         this.#initializeSubmission();
     }
 
@@ -89,6 +90,7 @@ class SummaryHelper {
     #switchToTab(tabId) {
         const tabs = Array.from(document.getElementsByClassName(this.#prefix + "-tab"));
         const pages = Array.from(document.getElementsByClassName(this.#prefix + "-page"));
+        const tagButtons = Array.from(document.getElementsByClassName(this.#prefix + "-" + tabId + "-btn-tag"));
         tabs.forEach(function (tab) {
             if (tab.dataset.tabId === tabId) {
                 tab.classList.add("active");
@@ -107,6 +109,14 @@ class SummaryHelper {
                 page.ariaCurrent = "false";
             }
         });
+        let selectedBtnTag = null;
+        for (const btnTag of tagButtons) {
+            if (btnTag.classList.contains("btn-primary")) {
+                selectedBtnTag = btnTag;
+                break;
+            }
+        }
+        this.#filterSuggestedAccounts(selectedBtnTag);
     }
 
     /**
@@ -117,6 +127,7 @@ class SummaryHelper {
         const buttons = Array.from(document.getElementsByClassName(this.#prefix + "-general-btn-tag"));
         const summary = document.getElementById(this.#prefix + "-summary");
         const tag = document.getElementById(this.#prefix + "-general-tag");
+        const helper = this;
         const updateSummary = function () {
             const pos = summary.value.indexOf("—");
             const prefix = tag.value === ""? "": tag.value + "—";
@@ -135,19 +146,26 @@ class SummaryHelper {
                 button.classList.remove("btn-outline-primary");
                 button.classList.add("btn-primary");
                 tag.value = button.dataset.value;
+                helper.#filterSuggestedAccounts(button);
                 updateSummary();
             };
         });
         tag.onchange = function () {
+            let isMatched = false;
             buttons.forEach(function (button) {
                 if (button.dataset.value === tag.value) {
                     button.classList.remove("btn-outline-primary");
                     button.classList.add("btn-primary");
+                    helper.#filterSuggestedAccounts(button);
+                    isMatched = true;
                 } else {
                     button.classList.remove("btn-primary");
                     button.classList.add("btn-outline-primary");
                 }
             });
+            if (!isMatched) {
+                helper.#filterSuggestedAccounts(null);
+            }
             updateSummary();
         };
     }
@@ -183,19 +201,26 @@ class SummaryHelper {
                 button.classList.remove("btn-outline-primary");
                 button.classList.add("btn-primary");
                 tag.value = button.dataset.value;
+                helper.#filterSuggestedAccounts(button);
                 updateSummary();
             };
         });
         tag.onchange = function () {
+            let isMatched = false;
             buttons.forEach(function (button) {
                 if (button.dataset.value === tag.value) {
                     button.classList.remove("btn-outline-primary");
                     button.classList.add("btn-primary");
+                    helper.#filterSuggestedAccounts(button);
+                    isMatched = true;
                 } else {
                     button.classList.remove("btn-primary");
                     button.classList.add("btn-outline-primary");
                 }
             });
+            if (!isMatched) {
+                helper.#filterSuggestedAccounts(null)
+            }
             updateSummary();
             helper.#validateGeneralTripTag();
         };
@@ -244,19 +269,26 @@ class SummaryHelper {
                 button.classList.remove("btn-outline-primary");
                 button.classList.add("btn-primary");
                 tag.value = button.dataset.value;
+                helper.#filterSuggestedAccounts(button);
                 updateSummary();
             };
         });
         tag.onchange = function () {
+            let isMatched = false;
             buttons.forEach(function (button) {
                 if (button.dataset.value === tag.value) {
                     button.classList.remove("btn-outline-primary");
                     button.classList.add("btn-primary");
+                    helper.#filterSuggestedAccounts(button);
+                    isMatched = true;
                 } else {
                     button.classList.remove("btn-primary");
                     button.classList.add("btn-outline-primary");
                 }
             });
+            if (!isMatched) {
+                helper.#filterSuggestedAccounts(null);
+            }
             updateSummary();
             helper.#validateBusTripTag();
         };
@@ -274,6 +306,33 @@ class SummaryHelper {
         };
     }
 
+    /**
+     * Filters the suggested accounts.
+     *
+     * @param btnTag {HTMLButtonElement|null} the tag button
+     */
+    #filterSuggestedAccounts(btnTag) {
+        const accountButtons = Array.from(document.getElementsByClassName(this.#prefix + "-account"));
+        if (btnTag === null) {
+            for (const btnAccount of accountButtons) {
+                btnAccount.classList.add("d-none");
+                btnAccount.classList.remove("btn-primary");
+                btnAccount.classList.add("btn-outline-primary");
+                this.#selectAccount(null);
+            }
+            return;
+        }
+        const suggested = JSON.parse(btnTag.dataset.accounts);
+        for (const btnAccount of accountButtons) {
+            if (suggested.includes(btnAccount.dataset.code)) {
+                btnAccount.classList.remove("d-none");
+            } else {
+                btnAccount.classList.add("d-none");
+            }
+            this.#selectAccount(suggested[0]);
+        }
+    }
+
     /**
      * Initializes the number helper.
      *
@@ -292,6 +351,46 @@ class SummaryHelper {
         };
     }
 
+    /**
+     * Initializes the suggested accounts.
+     *
+     */
+    #initializeSuggestedAccounts() {
+        const accountButtons = Array.from(document.getElementsByClassName(this.#prefix + "-account"));
+        const helper = this;
+        accountButtons.forEach(function (btnAccount) {
+            btnAccount.onclick = function () {
+                helper.#selectAccount(btnAccount.dataset.code);
+            };
+        });
+    }
+
+    /**
+     * Select a suggested account.
+     *
+     * @param selectedCode {string|null} the account code, or null to deselect the account
+     */
+    #selectAccount(selectedCode) {
+        const form = document.getElementById(this.#prefix);
+        if (selectedCode === null) {
+            form.dataset.selectedAccountCode = "";
+            form.dataset.selectedAccountText = "";
+            return;
+        }
+        const accountButtons = Array.from(document.getElementsByClassName(this.#prefix + "-account"));
+        accountButtons.forEach(function (btnAccount) {
+            if (btnAccount.dataset.code === selectedCode) {
+                btnAccount.classList.remove("btn-outline-primary");
+                btnAccount.classList.add("btn-primary");
+                form.dataset.selectedAccountCode = btnAccount.dataset.code;
+                form.dataset.selectedAccountText = btnAccount.dataset.text;
+            } else {
+                btnAccount.classList.remove("btn-primary");
+                btnAccount.classList.add("btn-outline-primary");
+            }
+        })
+    }
+
     /**
      * Initializes the summary submission
      *
@@ -512,9 +611,12 @@ class SummaryHelper {
      *
      */
     #submit() {
+        const form = document.getElementById(this.#prefix);
         const summary = document.getElementById(this.#prefix + "-summary");
         const formSummaryControl = document.getElementById("accounting-entry-form-summary-control");
         const formSummary = document.getElementById("accounting-entry-form-summary");
+        const formAccountControl = document.getElementById("accounting-entry-form-account-control");
+        const formAccount = document.getElementById("accounting-entry-form-account");
         const helperModal = document.getElementById(this.#prefix + "-modal");
         const entryModal = document.getElementById("accounting-entry-form-modal");
         if (summary.value === "") {
@@ -522,6 +624,12 @@ class SummaryHelper {
         } else {
             formSummaryControl.classList.add("accounting-not-empty");
         }
+        if (form.dataset.selectedAccountCode !== "") {
+            formAccountControl.classList.add("accounting-not-empty");
+            formAccount.dataset.code = form.dataset.selectedAccountCode;
+            formAccount.dataset.text = form.dataset.selectedAccountText;
+            formAccount.innerText = form.dataset.selectedAccountText;
+        }
         formSummary.dataset.value = summary.value;
         formSummary.innerText = summary.value;
         bootstrap.Modal.getInstance(helperModal).hide();
@@ -573,6 +681,7 @@ class SummaryHelper {
                 button.classList.remove("btn-primary");
             }
         });
+        this.#filterSuggestedAccounts(null);
         this.#switchToTab(this.#defaultTabId);
     }
 
@@ -626,12 +735,13 @@ class SummaryHelper {
         if (numberStr !== undefined) {
             number.value = parseInt(numberStr);
         }
-        buttons.forEach(function (button) {
+        for (const button of buttons) {
             if (button.dataset.value === tagName) {
                 button.classList.remove("btn-outline-primary");
                 button.classList.add("btn-primary");
+                this.#filterSuggestedAccounts(button);
             }
-        });
+        }
         this.#switchToTab("bus");
     }
 
@@ -666,12 +776,13 @@ class SummaryHelper {
         if (numberStr !== undefined) {
             number.value = parseInt(numberStr);
         }
-        buttons.forEach(function (button) {
+        for (const button of buttons) {
             if (button.dataset.value === tagName) {
                 button.classList.remove("btn-outline-primary");
                 button.classList.add("btn-primary");
+                this.#filterSuggestedAccounts(button);
             }
-        });
+        }
         this.#switchToTab("travel");
     }
 
@@ -689,12 +800,13 @@ class SummaryHelper {
         if (numberStr !== undefined) {
             number.value = parseInt(numberStr);
         }
-        buttons.forEach(function (button) {
+        for (const button of buttons) {
             if (button.dataset.value === tagName) {
                 button.classList.remove("btn-outline-primary");
                 button.classList.add("btn-primary");
+                this.#filterSuggestedAccounts(button);
             }
-        });
+        }
         this.#switchToTab("general");
     }
 
diff --git a/src/accounting/templates/accounting/transaction/include/summary-helper-modal.html b/src/accounting/templates/accounting/transaction/include/summary-helper-modal.html
index eb78296..fe5d75f 100644
--- a/src/accounting/templates/accounting/transaction/include/summary-helper-modal.html
+++ b/src/accounting/templates/accounting/transaction/include/summary-helper-modal.html
@@ -19,7 +19,7 @@ entry-form-modal.html: The modal of the summary helper
 Author: imacat@mail.imacat.idv.tw (imacat)
 First written: 2023/2/28
 #}
-<form id="accounting-summary-helper-{{ summary_helper.type }}" class="accounting-summary-helper" data-entry-type="{{ summary_helper.type }}" data-default-tab-id="general">
+<form id="accounting-summary-helper-{{ summary_helper.type }}" class="accounting-summary-helper" data-entry-type="{{ summary_helper.type }}" data-default-tab-id="general" data-selected-account-code="" data-selected-account-text="">
   <div id="accounting-summary-helper-{{ summary_helper.type }}-modal" class="modal fade" tabindex="-1" aria-labelledby="accounting-summary-helper-{{ summary_helper.type }}-modal-label" aria-hidden="true">
     <div class="modal-dialog">
       <div class="modal-content">
@@ -70,7 +70,7 @@ First written: 2023/2/28
 
             <div>
               {% for tag in summary_helper.general.tags %}
-                <button class="btn btn-outline-primary accounting-summary-helper-{{ summary_helper.type }}-btn-tag accounting-summary-helper-{{ summary_helper.type }}-general-btn-tag" type="button" tabindex="-1" data-value="{{ tag.name }}">
+                <button class="btn btn-outline-primary accounting-summary-helper-{{ summary_helper.type }}-btn-tag accounting-summary-helper-{{ summary_helper.type }}-general-btn-tag" type="button" tabindex="-1" data-value="{{ tag.name }}" data-accounts="{{ tag.account_codes|tojson|forceescape }}">
                   {{ tag }}
                 </button>
               {% endfor %}
@@ -87,7 +87,7 @@ First written: 2023/2/28
 
             <div>
               {% for tag in summary_helper.travel.tags %}
-                <button class="btn btn-outline-primary accounting-summary-helper-{{ summary_helper.type }}-btn-tag accounting-summary-helper-{{ summary_helper.type }}-travel-btn-tag" type="button" tabindex="-1" data-value="{{ tag.name }}">
+                <button class="btn btn-outline-primary accounting-summary-helper-{{ summary_helper.type }}-btn-tag accounting-summary-helper-{{ summary_helper.type }}-travel-btn-tag" type="button" tabindex="-1" data-value="{{ tag.name }}" data-accounts="{{ tag.account_codes|tojson|forceescape }}">
                   {{ tag }}
                 </button>
               {% endfor %}
@@ -128,7 +128,7 @@ First written: 2023/2/28
 
             <div>
               {% for tag in summary_helper.bus.tags %}
-                <button class="btn btn-outline-primary accounting-summary-helper-{{ summary_helper.type }}-btn-tag accounting-summary-helper-{{ summary_helper.type }}-bus-btn-tag" type="button" tabindex="-1" data-value="{{ tag.name }}">
+                <button class="btn btn-outline-primary accounting-summary-helper-{{ summary_helper.type }}-btn-tag accounting-summary-helper-{{ summary_helper.type }}-bus-btn-tag" type="button" tabindex="-1" data-value="{{ tag.name }}" data-accounts="{{ tag.account_codes|tojson|forceescape }}">
                   {{ tag }}
                 </button>
               {% endfor %}
@@ -161,6 +161,15 @@ First written: 2023/2/28
               <div id="accounting-summary-helper-{{ summary_helper.type }}-number-error" class="invalid-feedback"></div>
             </div>
           </div>
+
+          {# The suggested accounts #}
+          <div class="mt-3">
+            {% for account in summary_helper.accounts %}
+              <button class="btn btn-outline-primary d-none accounting-summary-helper-{{ summary_helper.type }}-account" type="button" role="button" data-code="{{ account.code }}" data-text="{{ account }}">
+                {{ account }}
+              </button>
+            {% endfor %}
+          </div>
         </div>
         <div class="modal-footer">
           <button type="button" class="btn btn-secondary accounting-summary-helper-{{ summary_helper.type }}-close" data-bs-toggle="modal" data-bs-target="">{{ A_("Cancel") }}</button>
diff --git a/src/accounting/transaction/summary_helper.py b/src/accounting/transaction/summary_helper.py
index 7fe2695..5805a62 100644
--- a/src/accounting/transaction/summary_helper.py
+++ b/src/accounting/transaction/summary_helper.py
@@ -34,8 +34,10 @@ class SummaryAccount:
         :param account: The account.
         :param freq: The frequency of the tag with the account.
         """
-        self.__account: Account = account
+        self.account: Account = account
         """The account."""
+        self.id: int = account.id
+        """The account ID."""
         self.code: str = account.code
         """The account code."""
         self.freq: int = freq
@@ -46,7 +48,7 @@ class SummaryAccount:
 
         :return: The string representation of the account.
         """
-        return str(self.__account)
+        return str(self.account)
 
     def add_freq(self, freq: int) -> None:
         """Adds the frequency of an account.
@@ -98,6 +100,14 @@ class SummaryTag:
         """
         return sorted(self.__account_dict.values(), key=lambda x: -x.freq)
 
+    @property
+    def account_codes(self) -> list[str]:
+        """Returns the account codes by the order of their frequencies.
+
+        :return: The account codes by the order of their frequencies.
+        """
+        return [x.code for x in self.accounts]
+
 
 class SummaryType:
     """A summary type"""
@@ -166,6 +176,26 @@ class SummaryEntryType:
         """
         self.__type_dict[tag_type].add_tag(name, account, freq)
 
+    @property
+    def accounts(self) -> list[SummaryAccount]:
+        """Returns the suggested accounts of all tags in the summary helper in
+        the entry type, in their frequency order.
+
+        :return: The suggested accounts of all tags, in their frequency order.
+        """
+        accounts: dict[int, SummaryAccount] = {}
+        freq: dict[int, int] = {}
+        for tag_type in self.__type_dict.values():
+            for tag in tag_type.tags:
+                for account in tag.accounts:
+                    accounts[account.id] = account
+                    if account.id not in freq:
+                        freq[account.id] = 0
+                    freq[account.id] \
+                        = freq[account.id] + account.freq
+        return [accounts[y] for y in sorted(freq.keys(),
+                                            key=lambda x: -freq[x])]
+
 
 class SummaryHelper:
     """The summary helper."""