diff --git a/lib/api/api.js b/lib/api/api.js
index bf0d9f65d4..f1b32e61bb 100644
--- a/lib/api/api.js
+++ b/lib/api/api.js
@@ -146,6 +146,16 @@ const api = {
 
         const requestContexts = prepareRequestContexts(apiMethod, request,
             sourceBucket, sourceObject, sourceVersionId);
+
+        if (apiMethod === 'completeMultipartUpload' || apiMethod === 'abortMultipartUpload') {
+            // Request account quotas explicitly for MPU requests, to consider parts cleanup
+            // NOTE: we need quota for these, but it will be evaluated at the end of the API,
+            // once the parts have actually been deleted (not via standardMetadataValidateBucketAndObj)
+            requestContexts.forEach(context => {
+                context._needQuota = true; // eslint-disable-line no-param-reassign
+            });
+        }
+
         // Extract all the _apiMethods and store them in an array
         const apiMethods = requestContexts ? requestContexts.map(context => context._apiMethod) : [];
         // Attach the names to the current request
diff --git a/lib/api/apiUtils/object/abortMultipartUpload.js b/lib/api/apiUtils/object/abortMultipartUpload.js
index 97eda8ff4e..c860c5a7f1 100644
--- a/lib/api/apiUtils/object/abortMultipartUpload.js
+++ b/lib/api/apiUtils/object/abortMultipartUpload.js
@@ -5,6 +5,7 @@ const { data } = require('../../../data/wrapper');
 const locationConstraintCheck = require('../object/locationConstraintCheck');
 const { standardMetadataValidateBucketAndObj } =
     require('../../../metadata/metadataUtils');
+const { validateQuotas } = require('../quotas/quotaUtils');
 const services = require('../../../services');
 const metadata = require('../../../metadata/wrapper');
 
@@ -138,7 +139,22 @@ function abortMultipartUpload(authInfo, bucketName, objectKey, uploadId, log,
                     }
                     cb();
                 });
-            }, () => next(null, mpuBucket, storedParts, destBucket));
+            }, () => {
+                const length = locations.reduce((length, loc) => length + loc.size, 0);
+                return validateQuotas(request, destBucket, request.accountQuotas,
+                    ['objectDelete'], 'objectDelete', -length, false, log, err => {
+                        if (err) {
+                            // Ignore error, as the data has been deleted already: only inflight count
+                            // has not been updated, and will be eventually consistent anyway
+                            log.warn('failed to update inflights', {
+                                method: 'abortMultipartUpload',
+                                locations,
+                                error: err,
+                            });
+                        }
+                        next(null, mpuBucket, storedParts, destBucket);
+                    });
+            });
         },
         function deleteShadowObjectMetadata(mpuBucket, storedParts, destBucket, next) {
             let splitter = constants.splitter;
diff --git a/lib/api/completeMultipartUpload.js b/lib/api/completeMultipartUpload.js
index 0b5fc339d1..5117349a19 100644
--- a/lib/api/completeMultipartUpload.js
+++ b/lib/api/completeMultipartUpload.js
@@ -22,6 +22,7 @@ const locationKeysHaveChanged
     = require('./apiUtils/object/locationKeysHaveChanged');
 const { setExpirationHeaders } = require('./apiUtils/object/expirationHeaders');
 const { validatePutVersionId } = require('./apiUtils/object/coldStorage');
+const { validateQuotas } = require('./apiUtils/quotas/quotaUtils');
 
 const versionIdUtils = versioning.VersionID;
 
@@ -516,14 +517,27 @@ function completeMultipartUpload(authInfo, request, log, callback) {
         function batchDeleteExtraParts(extraPartLocations, destinationBucket,
             aggregateETag, generatedVersionId, next) {
             if (extraPartLocations && extraPartLocations.length > 0) {
-                return data.batchDelete(extraPartLocations, request.method,
-                    null, log, err => {
-                        if (err) {
-                            return next(err);
-                        }
-                        return next(null, destinationBucket, aggregateETag,
-                            generatedVersionId);
+                return data.batchDelete(extraPartLocations, request.method, null, log, err => {
+                    if (err) {
+                        return next(err);
+                    }
+
+                    const length = extraPartLocations.reduce((length, loc) => length + loc.size, 0);
+                    return validateQuotas(request, destinationBucket, request.accountQuotas,
+                        ['objectDelete'], 'objectDelete', -length, false, log, err => {
+                            if (err) {
+                                // Ignore error, as the data has been deleted already: only inflight count
+                                // has not been updated, and will be eventually consistent anyway
+                                log.warn('failed to update inflights', {
+                                    method: 'completeMultipartUpload',
+                                    extraPartLocations,
+                                    error: err,
+                                });
+                            }
+                            return next(null, destinationBucket, aggregateETag,
+                                generatedVersionId);
                     });
+                });
             }
             return next(null, destinationBucket, aggregateETag,
                 generatedVersionId);