diff --git a/packages/@n8n/config/src/configs/data-table.config.ts b/packages/@n8n/config/src/configs/data-table.config.ts
index f9178eaaf1a..256fad3b318 100644
--- a/packages/@n8n/config/src/configs/data-table.config.ts
+++ b/packages/@n8n/config/src/configs/data-table.config.ts
@@ -9,9 +9,10 @@ export class DataTableConfig {
 	/**
 	 * The percentage threshold at which a warning is triggered for data tables.
 	 * When the usage of a data table reaches or exceeds this value, a warning is issued.
+	 * Defaults to 80% of maxSize if not explicitly set via environment variable.
 	 */
 	@Env('N8N_DATA_TABLES_WARNING_THRESHOLD_BYTES')
-	warningThreshold: number = 45 * 1024 * 1024;
+	warningThreshold?: number;
 
 	/**
 	 * The duration in milliseconds for which the data table size is cached.
diff --git a/packages/@n8n/config/test/config.test.ts b/packages/@n8n/config/test/config.test.ts
index a84ae9c697c..99eec8cf166 100644
--- a/packages/@n8n/config/test/config.test.ts
+++ b/packages/@n8n/config/test/config.test.ts
@@ -54,7 +54,6 @@ describe('GlobalConfig', () => {
 		editorBaseUrl: '',
 		dataTable: {
 			maxSize: 50 * 1024 * 1024,
-			warningThreshold: 45 * 1024 * 1024,
 			sizeCheckCacheDuration: 60000,
 		},
 		database: {
diff --git a/packages/cli/src/modules/data-table/data-table-size-validator.service.ts b/packages/cli/src/modules/data-table/data-table-size-validator.service.ts
index 4121d63d2ad..c705e633fc4 100644
--- a/packages/cli/src/modules/data-table/data-table-size-validator.service.ts
+++ b/packages/cli/src/modules/data-table/data-table-size-validator.service.ts
@@ -70,9 +70,13 @@ export class DataTableSizeValidator {
 	}
 
 	sizeToState(sizeBytes: number): DataTableSizeStatus {
+		const warningThreshold =
+			this.globalConfig.dataTable.warningThreshold ??
+			Math.floor(0.8 * this.globalConfig.dataTable.maxSize);
+
 		if (sizeBytes >= this.globalConfig.dataTable.maxSize) {
 			return 'error';
-		} else if (sizeBytes >= this.globalConfig.dataTable.warningThreshold) {
+		} else if (sizeBytes >= warningThreshold) {
 			return 'warn';
 		}
 		return 'ok';