diff --git a/CPSCore/src/main/java/community/icon/cps/score/cpscore/CPSCore.java b/CPSCore/src/main/java/community/icon/cps/score/cpscore/CPSCore.java
index 06957e67..d4ad1bf4 100644
--- a/CPSCore/src/main/java/community/icon/cps/score/cpscore/CPSCore.java
+++ b/CPSCore/src/main/java/community/icon/cps/score/cpscore/CPSCore.java
@@ -2564,25 +2564,27 @@ public Map<String, Object> getProposalsHistory(@Optional int startIndex) {
 
     @Override
     @External(readonly = true)
-    public List<Integer> getRemainingMilestones(String ipfsHash){
+    public List<Map<String,?>> getRemainingMilestones(String ipfsHash){
         String ipfsHashPrefix = proposalPrefix(ipfsHash);
         ArrayDB<Integer> milestoneIDs = milestoneIds.at(ipfsHashPrefix);
 
-        List<Integer> milestoneIdList = new ArrayList<>();
-        for (int i = 0; i < milestoneIDs.size(); i++) {
+        int size = milestoneIDs.size();
+        List<Map<String,?>> milestoneIdList = new ArrayList<>();
+        for (int i = 0; i < size; i++) {
             int milestoneId = milestoneIDs.get(i);
             String milestonePrefix = mileStonePrefix(ipfsHash, milestoneId);
-            int proposalTotalPeriod = proposalPeriod.at(ipfsHashPrefix).getOrDefault(0);
+            int proposalPeriod = ProposalDataDb.proposalPeriod.at(ipfsHashPrefix).getOrDefault(0);
             int completionPeriod = MilestoneDb.completionPeriod.at(milestonePrefix).getOrDefault(0);
 
-            int computedCompletionPeriod = proposalTotalPeriod + completionPeriod;
+            int computedCompletionPeriod = proposalPeriod + completionPeriod;
 
-            int currentPeriod = getPeriodCount();
-            if (computedCompletionPeriod > currentPeriod) {
-                int status = MilestoneDb.status.at(milestonePrefix).getOrDefault(0);
-                if (status != MILESTONE_REPORT_APPROVED ){
-                    milestoneIdList.add(milestoneId);
-                }
+            int status = MilestoneDb.status.at(milestonePrefix).getOrDefault(0);
+
+            if (status != MILESTONE_REPORT_APPROVED ){
+                milestoneIdList.add(Map.of(MILESTONE_ID,milestoneId,
+                        COMPLETION_PERIOD,computedCompletionPeriod,
+                        BUDGET,MilestoneDb.budget.at(milestonePrefix).getOrDefault(BigInteger.ZERO))
+                        );
             }
         }
         return milestoneIdList;
diff --git a/CPSTreasury/src/main/java/community/icon/cps/score/cpstreasury/CPSTreasury.java b/CPSTreasury/src/main/java/community/icon/cps/score/cpstreasury/CPSTreasury.java
index 0e87aeeb..e95ce67c 100644
--- a/CPSTreasury/src/main/java/community/icon/cps/score/cpstreasury/CPSTreasury.java
+++ b/CPSTreasury/src/main/java/community/icon/cps/score/cpstreasury/CPSTreasury.java
@@ -187,7 +187,6 @@ public BigInteger getOnsetPayment() {
                     BigInteger totalBudget = (BigInteger) proposal_details.get(consts.TOTAL_BUDGET);
                     BigInteger totalPaidAmount = (BigInteger) proposal_details.get(consts.WITHDRAW_AMOUNT);
 
-                    BigInteger remainingAmount = totalBudget.subtract(totalPaidAmount);
                     Map<String, ?> project_details = Map.of(
                             consts.IPFS_HASH, _ipfs_key,
                             consts.TOKEN, flag,
@@ -195,7 +194,7 @@ public BigInteger getOnsetPayment() {
                             consts.TOTAL_INSTALLMENT_PAID, totalPaidAmount,
                             consts.TOTAL_INSTALLMENT_COUNT, totalInstallment,
                             consts.TOTAL_TIMES_INSTALLMENT_PAID, totalPaidCount,
-                            consts.INSTALLMENT_AMOUNT, remainingAmount.divide(BigInteger.valueOf(totalInstallment - totalPaidCount)));
+                            consts.INSTALLMENT_AMOUNT, getInstallmetAmount(_ipfs_key));
 
                     projectDetails.add(project_details);
 
@@ -600,6 +599,11 @@ public void updateNewProjects(String oldHash, String newHash, int milestoneCount
 
     }
 
+    private BigInteger getInstallmetAmount(String ipfsHash){
+        List<Map<String,?>> remainingMilestones = callScore(List.class,getCpsScore(),"getRemainingMilestones",ipfsHash);
+        BigInteger installmentAmount = (BigInteger) remainingMilestones.get(0).get(consts.BUDGET);
+        return installmentAmount;
+    }
 
     public <T> T callScore(Class<T> t, Address address, String method, Object... params) {
         return Context.call(t, address, method, params);
diff --git a/CPSTreasury/src/main/java/community/icon/cps/score/cpstreasury/utils/consts.java b/CPSTreasury/src/main/java/community/icon/cps/score/cpstreasury/utils/consts.java
index a84965ef..fe450bd1 100644
--- a/CPSTreasury/src/main/java/community/icon/cps/score/cpstreasury/utils/consts.java
+++ b/CPSTreasury/src/main/java/community/icon/cps/score/cpstreasury/utils/consts.java
@@ -29,6 +29,7 @@ public consts() {
     public static final String INSTALLMENT_AMOUNT = "installment_amount";
     public static final String TOTAL_INSTALLMENT_COUNT = "total_installment_count";
     public static final String SPONSOR_BOND_AMOUNT = "sponsor_bond_amount";
+    public static final String BUDGET = "budget";
 
 
 }
diff --git a/score-lib/src/main/java/community/icon/cps/score/lib/interfaces/CPSCoreInterface.java b/score-lib/src/main/java/community/icon/cps/score/lib/interfaces/CPSCoreInterface.java
index d07d19b3..2212a955 100644
--- a/score-lib/src/main/java/community/icon/cps/score/lib/interfaces/CPSCoreInterface.java
+++ b/score-lib/src/main/java/community/icon/cps/score/lib/interfaces/CPSCoreInterface.java
@@ -266,7 +266,7 @@ public static class MilestoneVoteAttributes {
     Map<String, Object> getProposalsHistory(@Optional int startIndex);
 
     @External(readonly = true)
-    List<Integer> getRemainingMilestones(String ipfsHash);
+    List<Map<String,?>> getRemainingMilestones(String ipfsHash);
 
     //    EventLogs
     @EventLog(indexed = 1)