diff --git a/components/lib/tristatecheckbox/BaseTriStateCheckbox.vue b/components/lib/tristatecheckbox/BaseTriStateCheckbox.vue
new file mode 100644
index 000000000..92478ea89
--- /dev/null
+++ b/components/lib/tristatecheckbox/BaseTriStateCheckbox.vue
@@ -0,0 +1,75 @@
+<script>
+import BaseComponent from 'primevue/basecomponent';
+import { useStyle } from 'primevue/usestyle';
+
+const styles = ``;
+
+const classes = {
+    root: ({ instance, props }) => [
+        'p-checkbox p-component',
+        {
+            'p-checkbox-checked': props.modelValue === true,
+            'p-checkbox-disabled': props.disabled,
+            'p-checkbox-focused': instance.focused
+        }
+    ],
+    hiddenInputWrapper: 'p-hidden-accessible',
+    srOnlyAria: 'p-sr-only',
+    checkbox: ({ instance, props }) => [
+        'p-checkbox-box',
+        {
+            'p-highlight': props.modelValue != null,
+            'p-disabled': props.disabled,
+            'p-focus': instance.focused
+        }
+    ],
+    checkIcon: 'p-checkbox-icon',
+    uncheckIcon: 'p-checkbox-icon',
+    nullableIcon: 'p-checkbox-icon'
+};
+
+const { load: loadStyle, unload: unloadStyle } = useStyle(styles, { id: 'primevue_tristatecheckbox_style', manual: true });
+
+export default {
+    name: 'BaseTriStateCheckbox',
+    extends: BaseComponent,
+    props: {
+        modelValue: null,
+        inputId: {
+            type: String,
+            default: null
+        },
+        inputProps: {
+            type: null,
+            default: null
+        },
+        disabled: {
+            type: Boolean,
+            default: false
+        },
+        tabindex: {
+            type: Number,
+            default: 0
+        },
+        'aria-labelledby': {
+            type: String,
+            default: null
+        },
+        'aria-label': {
+            type: String,
+            default: null
+        }
+    },
+    css: {
+        classes
+    },
+    watch: {
+        isUnstyled: {
+            immediate: true,
+            handler(newValue) {
+                !newValue && loadStyle();
+            }
+        }
+    }
+};
+</script>
diff --git a/components/lib/tristatecheckbox/TriStateCheckbox.d.ts b/components/lib/tristatecheckbox/TriStateCheckbox.d.ts
index 5dde0de83..5cc2104c0 100755
--- a/components/lib/tristatecheckbox/TriStateCheckbox.d.ts
+++ b/components/lib/tristatecheckbox/TriStateCheckbox.d.ts
@@ -138,6 +138,11 @@ export interface TriStateCheckboxProps {
      * @type {TriStateCheckboxPassThroughOptions}
      */
     pt?: TriStateCheckboxPassThroughOptions;
+    /**
+     * When enabled, it removes component related styles in the core.
+     * @defaultValue false
+     */
+    unstyled?: boolean;
 }
 
 /**
@@ -147,15 +152,30 @@ export interface TriStateCheckboxSlots {
     /**
      * Custom check icon template.
      */
-    checkicon(): VNode[];
+    checkicon(scope: {
+        /**
+         * Style class of the icon.
+         */
+        class: string;
+    }): VNode[];
     /**
      * Custom uncheck icon template.
      */
-    uncheckicon(): VNode[];
+    uncheckicon(scope: {
+        /**
+         * Style class of the icon.
+         */
+        class: string;
+    }): VNode[];
     /**
      * Custom nullable icon template.
      */
-    nullableicon(): VNode[];
+    nullableicon(scope: {
+        /**
+         * Style class of the icon.
+         */
+        class: string;
+    }): VNode[];
 }
 
 /**
diff --git a/components/lib/tristatecheckbox/TriStateCheckbox.vue b/components/lib/tristatecheckbox/TriStateCheckbox.vue
index d22027461..45e77e857 100755
--- a/components/lib/tristatecheckbox/TriStateCheckbox.vue
+++ b/components/lib/tristatecheckbox/TriStateCheckbox.vue
@@ -1,6 +1,6 @@
 <template>
-    <div :class="containerClass" @click="onClick($event)" v-bind="ptm('root')">
-        <div class="p-hidden-accessible" v-bind="ptm('hiddenInputWrapper')">
+    <div :class="cx('root')" @click="onClick($event)" v-bind="ptm('root')">
+        <div :class="cx('hiddenInputWrapper')" :style="sx('hiddenAccessible', isUnstyled)" v-bind="ptm('hiddenInputWrapper')" :data-p-hidden-accessible="true">
             <input
                 ref="input"
                 :id="inputId"
@@ -16,57 +16,30 @@
                 v-bind="{ ...inputProps, ...ptm('hiddenInput') }"
             />
         </div>
-        <span class="p-sr-only" aria-live="polite" v-bind="ptm('srOnlyAria')">{{ ariaValueLabel }}</span>
-        <div ref="box" :class="['p-checkbox-box', { 'p-highlight': modelValue != null, 'p-disabled': disabled, 'p-focus': focused }]" v-bind="getPTOptions('checkbox')">
-            <slot v-if="modelValue === true" name="checkicon">
-                <component :is="'CheckIcon'" class="p-checkbox-icon" v-bind="ptm('checkIcon')" />
+        <span :class="cx('srOnlyAria')" aria-live="polite" v-bind="ptm('srOnlyAria')">{{ ariaValueLabel }}</span>
+        <div ref="box" :class="cx('checkbox')" v-bind="getPTOptions('checkbox')" :data-p-highlight="modelValue != null" :data-p-disabled="disabled" :data-p-focused="focused">
+            <slot v-if="modelValue === true" name="checkicon" :class="cx('checkIcon')">
+                <component :is="'CheckIcon'" :class="cx('checkIcon')" v-bind="ptm('checkIcon')" />
             </slot>
-            <slot v-else-if="modelValue === false" name="uncheckicon">
-                <component :is="'TimesIcon'" class="p-checkbox-icon" v-bind="ptm('uncheckIcon')" />
+            <slot v-else-if="modelValue === false" name="uncheckicon" :class="cx('uncheckIcon')">
+                <component :is="'TimesIcon'" :class="cx('uncheckIcon')" v-bind="ptm('uncheckIcon')" />
             </slot>
-            <slot v-else name="nullableicon">
-                <span class="p-checkbox-icon" v-bind="ptm('nullableIcon')"></span>
+            <slot v-else name="nullableicon" :class="cx('nullableIcon')">
+                <span :class="cx('nullableIcon')" v-bind="ptm('nullableIcon')"></span>
             </slot>
         </div>
     </div>
 </template>
 
 <script>
-import BaseComponent from 'primevue/basecomponent';
 import CheckIcon from 'primevue/icons/check';
 import TimesIcon from 'primevue/icons/times';
+import BaseTriStateCheckbox from './BaseTriStateCheckbox.vue';
 
 export default {
     name: 'TriStateCheckbox',
-    extends: BaseComponent,
+    extends: BaseTriStateCheckbox,
     emits: ['click', 'update:modelValue', 'change', 'keydown', 'focus', 'blur'],
-    props: {
-        modelValue: null,
-        inputId: {
-            type: String,
-            default: null
-        },
-        inputProps: {
-            type: null,
-            default: null
-        },
-        disabled: {
-            type: Boolean,
-            default: false
-        },
-        tabindex: {
-            type: Number,
-            default: 0
-        },
-        'aria-labelledby': {
-            type: String,
-            default: null
-        },
-        'aria-label': {
-            type: String,
-            default: null
-        }
-    },
     data() {
         return {
             focused: false
@@ -126,16 +99,6 @@ export default {
         }
     },
     computed: {
-        containerClass() {
-            return [
-                'p-checkbox p-component',
-                {
-                    'p-checkbox-checked': this.modelValue === true,
-                    'p-checkbox-disabled': this.disabled,
-                    'p-checkbox-focused': this.focused
-                }
-            ];
-        },
         ariaValueLabel() {
             return this.modelValue ? this.$primevue.config.locale.aria.trueLabel : this.modelValue === false ? this.$primevue.config.locale.aria.falseLabel : this.$primevue.config.locale.aria.nullLabel;
         }