diff --git a/apps/client/src/common/components/link/app-link/AppLink.tsx b/apps/client/src/common/components/link/app-link/AppLink.tsx
index 7135aff27..cc7a32ae7 100644
--- a/apps/client/src/common/components/link/app-link/AppLink.tsx
+++ b/apps/client/src/common/components/link/app-link/AppLink.tsx
@@ -1,9 +1,12 @@
 import { type PropsWithChildren } from 'react';
 import { useNavigate } from 'react-router-dom';
 
+import { cx } from '../../../utils/styleUtils';
+
 import style from './AppLink.module.scss';
 
 interface AppLinkProps {
+  className?: string;
   search: string;
 }
 
@@ -12,13 +15,13 @@ interface AppLinkProps {
  * Handles the path to respect Ontime Clouds base URL
  */
 export default function AppLink(props: PropsWithChildren<AppLinkProps>) {
-  const { search, children } = props;
+  const { className, search, children } = props;
   const navigate = useNavigate();
 
   const handleClick = () => navigate({ search });
 
   return (
-    <button onClick={handleClick} className={style.link}>
+    <button onClick={handleClick} className={cx([style.link, className])}>
       {children}
     </button>
   );
diff --git a/apps/client/src/common/hooks/useSocket.ts b/apps/client/src/common/hooks/useSocket.ts
index 0000a7650..1f8b91fca 100644
--- a/apps/client/src/common/hooks/useSocket.ts
+++ b/apps/client/src/common/hooks/useSocket.ts
@@ -41,6 +41,17 @@ export const useExternalMessageInput = createSelector((state: RuntimeStore) => (
   visible: state.message.timer.secondarySource === 'external',
 }));
 
+export const useTimerSchedule = createSelector((state: RuntimeStore) => ({
+  startedAt: state.timer.startedAt,
+  expectedFinish: state.timer.expectedFinish,
+  phase: state.timer.phase,
+  playback: state.timer.playback,
+}));
+
+export const useTimerCurrent = createSelector((state: RuntimeStore) => ({
+  current: state.timer.current,
+}));
+
 export const useMessagePreview = createSelector((state: RuntimeStore) => ({
   blink: state.message.timer.blink,
   blackout: state.message.timer.blackout,
@@ -114,6 +125,16 @@ export const setAuxTimer = {
   setDuration: (time: number) => socketSendJson('auxtimer', { '1': { duration: time } }),
 };
 
+export const useTimerSpeed = createSelector((state: RuntimeStore) => ({
+  speed: state.timer.speed,
+}));
+
+export const setTimerSpeed = {
+  calculateSpeed: () => socketSendJson('calculate-speed'),
+  getSpeed: () => socketSendJson('get-speed'),
+  setSpeed: (speed: number) => socketSendJson('set-speed', speed),
+};
+
 export const useSelectedEventId = createSelector((state: RuntimeStore) => ({
   selectedEventId: state.eventNow?.id ?? null,
 }));
diff --git a/apps/client/src/features/control/playback/PlaybackControl.tsx b/apps/client/src/features/control/playback/PlaybackControl.tsx
index 4c7210b07..10408bbbe 100644
--- a/apps/client/src/features/control/playback/PlaybackControl.tsx
+++ b/apps/client/src/features/control/playback/PlaybackControl.tsx
@@ -6,6 +6,7 @@ import AddTime from './add-time/AddTime';
 import { AuxTimer } from './aux-timer/AuxTimer';
 import PlaybackButtons from './playback-buttons/PlaybackButtons';
 import PlaybackTimer from './playback-timer/PlaybackTimer';
+import TimerSpeed from './timer-speed/TimerSpeed';
 
 import style from './PlaybackControl.module.scss';
 
@@ -14,7 +15,7 @@ export default function PlaybackControl() {
 
   return (
     <div className={style.mainContainer}>
-      <PlaybackTimer playback={data.playback as Playback}>
+      <PlaybackTimer playback={data.playback}>
         <AddTime playback={data.playback} />
       </PlaybackTimer>
       <PlaybackButtons
@@ -23,6 +24,7 @@ export default function PlaybackControl() {
         selectedEventIndex={data.selectedEventIndex}
         timerPhase={data.timerPhase}
       />
+      <TimerSpeed isPlaying={data.playback === Playback.Play} eventIndex={data.selectedEventIndex} />
       <AuxTimer />
     </div>
   );
diff --git a/apps/client/src/features/control/playback/add-time/AddTime.tsx b/apps/client/src/features/control/playback/add-time/AddTime.tsx
index 4bb9f1046..c842a4adc 100644
--- a/apps/client/src/features/control/playback/add-time/AddTime.tsx
+++ b/apps/client/src/features/control/playback/add-time/AddTime.tsx
@@ -1,3 +1,4 @@
+import { memo } from 'react';
 import { Tooltip } from '@chakra-ui/react';
 import { useLocalStorage } from '@mantine/hooks';
 import { IoAdd } from '@react-icons/all-files/io5/IoAdd';
@@ -16,7 +17,9 @@ interface AddTimeProps {
   playback: Playback;
 }
 
-export default function AddTime(props: AddTimeProps) {
+export default memo(AddTime);
+
+function AddTime(props: AddTimeProps) {
   const { playback } = props;
   const [time, setTime] = useLocalStorage({ key: 'add-time', defaultValue: 300_000 }); // 5 minutes
 
diff --git a/apps/client/src/features/control/playback/playback-timer/PlaybackTimer.module.scss b/apps/client/src/features/control/playback/playback-timer/PlaybackTimer.module.scss
index 1fd3fdbdb..b31ac2777 100644
--- a/apps/client/src/features/control/playback/playback-timer/PlaybackTimer.module.scss
+++ b/apps/client/src/features/control/playback/playback-timer/PlaybackTimer.module.scss
@@ -1,9 +1,6 @@
 .timeContainer {
   display: grid;
-  grid-template-areas:
-    'indicators timer  addtime'
-    'status     status addtime';
-  grid-template-rows: 1fr auto;
+  grid-template-areas: 'indicators timer addtime';
   grid-template-columns: 1.25rem 1fr 6.5rem;
   gap: $element-inner-spacing;
 }
@@ -50,29 +47,3 @@
     background-color: $playback-negative;
   }
 }
-
-// ---------> LABELS
-
-.status {
-  grid-area: status;
-  height: 1.5rem;
-  display: flex;
-  gap: $section-spacing;
-  margin-left: 1.5rem;
-}
-
-.tag {
-  color: $label-gray;
-  font-size: calc(1rem - 2px);
-  margin-right: 0.25rem;
-}
-
-.time {
-  color: $section-white;
-  font-size: $text-body-size;
-}
-
-.rolltag {
-  color: $ontime-roll;
-  font-size: $text-body-size;
-}
diff --git a/apps/client/src/features/control/playback/playback-timer/PlaybackTimer.tsx b/apps/client/src/features/control/playback/playback-timer/PlaybackTimer.tsx
index eb1a541a6..8b3c54e42 100644
--- a/apps/client/src/features/control/playback/playback-timer/PlaybackTimer.tsx
+++ b/apps/client/src/features/control/playback/playback-timer/PlaybackTimer.tsx
@@ -1,11 +1,8 @@
 import { PropsWithChildren } from 'react';
 import { Tooltip } from '@chakra-ui/react';
-import { MaybeNumber, Playback, TimerPhase } from 'ontime-types';
-import { dayInMs, millisToString } from 'ontime-utils';
+import { Playback, TimerPhase } from 'ontime-types';
 
-import AppLink from '../../../../common/components/link/app-link/AppLink';
 import { useTimer } from '../../../../common/hooks/useSocket';
-import useReport from '../../../../common/hooks-query/useReport';
 import { formatDuration } from '../../../../common/utils/time';
 import TimerDisplay from '../timer-display/TimerDisplay';
 
@@ -36,7 +33,16 @@ export default function PlaybackTimer(props: PropsWithChildren<PlaybackTimerProp
   const isOvertime = timer.phase === TimerPhase.Overtime;
   const hasAddedTime = Boolean(timer.addedTime);
 
-  const rollLabel = isRolling ? 'Roll mode active' : '';
+  const rollLabel = (() => {
+    if (!isRolling) {
+      return '';
+    }
+    if (isWaiting) {
+      return 'Roll: Countdown to start';
+    }
+
+    return 'Roll mode active';
+  })();
 
   const addedTimeLabel = resolveAddedTimeLabel(timer.addedTime);
 
@@ -52,55 +58,7 @@ export default function PlaybackTimer(props: PropsWithChildren<PlaybackTimerProp
         </Tooltip>
       </div>
       <TimerDisplay time={isWaiting ? timer.secondaryTimer : timer.current} />
-      <div className={style.status}>
-        {isWaiting ? (
-          <span className={style.rolltag}>Roll: Countdown to start</span>
-        ) : (
-          <RunningStatus startedAt={timer.startedAt} expectedFinish={timer.expectedFinish} playback={playback} />
-        )}
-      </div>
       {children}
     </div>
   );
 }
-
-interface RunningStatusProps {
-  startedAt: MaybeNumber;
-  expectedFinish: MaybeNumber;
-  playback: Playback;
-}
-function RunningStatus(props: RunningStatusProps) {
-  const { startedAt, expectedFinish, playback } = props;
-
-  if (playback === Playback.Stop) {
-    return <StoppedStatus />;
-  }
-
-  const started = millisToString(startedAt);
-  const finishedMs = expectedFinish !== null ? expectedFinish % dayInMs : null;
-  const finish = millisToString(finishedMs);
-
-  return (
-    <>
-      <span className={style.start}>
-        <span className={style.tag}>Started at</span>
-        <span className={style.time}>{started}</span>
-      </span>
-      <span className={style.finish}>
-        <span className={style.tag}>Expect end</span>
-        <span className={style.time}>{finish}</span>
-      </span>
-    </>
-  );
-}
-
-function StoppedStatus() {
-  const { data } = useReport();
-  const hasReport = Object.keys(data).length > 0;
-
-  if (hasReport) {
-    return <AppLink search='settings=feature_settings__report'>Go to report management</AppLink>;
-  }
-
-  return null;
-}
diff --git a/apps/client/src/features/control/playback/timer-display/TimerDisplay.module.scss b/apps/client/src/features/control/playback/timer-display/TimerDisplay.module.scss
index c93ddff23..2e5c3091f 100644
--- a/apps/client/src/features/control/playback/timer-display/TimerDisplay.module.scss
+++ b/apps/client/src/features/control/playback/timer-display/TimerDisplay.module.scss
@@ -9,6 +9,7 @@
   color: $timer-color;
   line-height: 0.9em;
   text-align: center;
+  align-self: center;
   letter-spacing: 0.1em;
   font-weight: 600;
   font-size: 3.5rem;
diff --git a/apps/client/src/features/control/playback/timer-speed/TimerSchedule.tsx b/apps/client/src/features/control/playback/timer-speed/TimerSchedule.tsx
new file mode 100644
index 000000000..55f50ff5a
--- /dev/null
+++ b/apps/client/src/features/control/playback/timer-speed/TimerSchedule.tsx
@@ -0,0 +1,88 @@
+import { Playback, TimerPhase } from 'ontime-types';
+import { dayInMs } from 'ontime-utils';
+
+import AppLink from '../../../../common/components/link/app-link/AppLink';
+import { useClock, useTimerCurrent, useTimerSchedule } from '../../../../common/hooks/useSocket';
+import useReport from '../../../../common/hooks-query/useReport';
+import { cx } from '../../../../common/utils/styleUtils';
+import { formatTime } from '../../../../common/utils/time';
+
+import style from './TimerSpeed.module.scss';
+
+interface MeetScheduleProps {
+  speed: number;
+  newSpeed: number;
+}
+
+/**
+ * We isolate this component since it has the potential to re-render on every second
+ */
+export default function TimerSchedule(props: MeetScheduleProps) {
+  const { speed, newSpeed } = props;
+  const { startedAt, expectedFinish, phase, playback } = useTimerSchedule();
+
+  const started = formatTime(startedAt);
+  const normalisedExpectedEnd = expectedFinish !== null ? expectedFinish % dayInMs : null;
+  const endTime = formatTime(normalisedExpectedEnd);
+
+  const isWaiting = phase === TimerPhase.Pending;
+  const hasNewSpeed = speed !== newSpeed;
+
+  if (isWaiting) {
+    return <div className={cx([style.entry, style.roll])}>Roll: Countdown to start</div>;
+  }
+
+  if (playback === Playback.Stop) {
+    return <StoppedStatus />;
+  }
+
+  return (
+    <div className={style.timers}>
+      <div className={style.entry}>
+        <div className={style.timerLabel}>Started at</div>
+        <div>{started}</div>
+      </div>
+      <div className={style.entry}>
+        <div className={style.timerLabel}>Expected end</div>
+        {hasNewSpeed ? <SpeedFinish newSpeed={newSpeed} /> : <div>{endTime}</div>}
+      </div>
+    </div>
+  );
+}
+
+// TODO: extract and test
+// calculate the new finish time
+function useExpectedTime(remainingTimeMs: number, speedFactor: number): number {
+  const { clock } = useClock();
+  const adjustedRemainingTimeMs = remainingTimeMs / speedFactor;
+  const newFinishTimeMs = clock + adjustedRemainingTimeMs;
+  return newFinishTimeMs;
+}
+
+function StoppedStatus() {
+  const { data } = useReport();
+  const hasReport = Object.keys(data).length > 0;
+
+  if (hasReport) {
+    return (
+      <AppLink className={style.entry} search='settings=feature_settings__report'>
+        Go to report management
+      </AppLink>
+    );
+  }
+
+  return <div className={style.entry}>No running playback</div>;
+}
+
+interface SpeedFinishProps {
+  newSpeed: number;
+}
+
+function SpeedFinish(props: SpeedFinishProps) {
+  const { newSpeed } = props;
+  const { current } = useTimerCurrent();
+
+  const newFinish = formatTime(useExpectedTime(current ?? 0, newSpeed));
+
+  return <div className={style.highlight}>{newFinish}</div>;
+}
diff --git a/apps/client/src/features/control/playback/timer-speed/TimerSpeed.module.scss b/apps/client/src/features/control/playback/timer-speed/TimerSpeed.module.scss
new file mode 100644
index 000000000..14fa0b4ef
--- /dev/null
+++ b/apps/client/src/features/control/playback/timer-speed/TimerSpeed.module.scss
@@ -0,0 +1,48 @@
+.panelContainer {
+  display: flex;
+  flex-direction: column;
+  gap: 0.5rem;
+  margin-top: 0.5rem;
+}
+
+.inlineApart {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  gap: 1rem;
+}
+
+.inlineSiblings {
+  display: flex;
+  gap: 0.5rem;
+}
+
+.timers {
+  display: grid;
+  grid-template-columns: 1fr 1fr;
+}
+
+.entry {
+  display: flex;
+  gap: 0.25rem;
+  height: 1.2rem;
+  align-items: end;
+  line-height: 1em;
+}
+
+.timerLabel {
+  color: $label-gray;
+  font-size: calc(1rem - 3px);
+}
+
+.roll {
+    color: $ontime-roll;
+}
+
+.highlight {
+  color: $highlight-orange;
+}
+
+.disabled {
+  opacity: $opacity-disabled;
+}
\ No newline at end of file
diff --git a/apps/client/src/features/control/playback/timer-speed/TimerSpeed.tsx b/apps/client/src/features/control/playback/timer-speed/TimerSpeed.tsx
new file mode 100644
index 000000000..465da7344
--- /dev/null
+++ b/apps/client/src/features/control/playback/timer-speed/TimerSpeed.tsx
@@ -0,0 +1,78 @@
+import { memo, useEffect, useState } from 'react';
+import { Button, Slider, SliderFilledTrack, SliderMark, SliderThumb, SliderTrack } from '@chakra-ui/react';
+import { MaybeNumber } from 'ontime-types';
+
+import { setTimerSpeed, useTimerSpeed } from '../../../../common/hooks/useSocket';
+import { cx } from '../../../../common/utils/styleUtils';
+
+import TimerSchedule from './TimerSchedule';
+
+import style from './TimerSpeed.module.scss';
+
+interface TimerSpeedProps {
+  isPlaying: boolean;
+  eventIndex: MaybeNumber;
+}
+
+export default memo(TimerSpeed);
+
+function TimerSpeed(props: TimerSpeedProps) {
+  const { isPlaying, eventIndex } = props;
+  const { speed } = useTimerSpeed();
+  const [newSpeed, setNewSpeed] = useState(1);
+  const { setSpeed } = setTimerSpeed;
+
+  // when a new timer is set, we want to reset the speed
+  useEffect(() => {
+    setNewSpeed(1);
+  }, [eventIndex]);
+
+  const handleApply = () => setSpeed(newSpeed);
+  const handleReset = () => {
+    setNewSpeed(1.0);
+    setSpeed(1.0);
+  };
+
+  const canReset = isPlaying && speed === newSpeed && newSpeed !== 1;
+  const canApply = isPlaying && speed !== newSpeed;
+  const willChangeSpeed = speed === 1 && !canApply;
+
+  return (
+    <div className={style.panelContainer}>
+      <TimerSchedule speed={speed} newSpeed={newSpeed} />
+      <div className={style.inlineApart}>
+        <div className={style.entry}>
+          <span className={cx([willChangeSpeed && style.disabled])}>{`${speed}x`}</span>
+          {newSpeed !== speed && <span className={style.highlight}>{` ⇢ ${newSpeed}x`}</span>}
+        </div>
+        <div className={style.inlineSiblings}>
+          <Button size='sm' variant='ontime-subtle-white' onClick={handleReset} isDisabled={!canReset}>
+            Reset
+          </Button>
+          <Button size='sm' variant='ontime-subtle-white' onClick={handleApply} isDisabled={!canApply}>
+            Apply
+          </Button>
+        </div>
+      </div>
+      <Slider
+        variant={newSpeed === 1 ? 'ontime' : 'ontime-highlight'}
+        defaultValue={newSpeed}
+        min={0.5}
+        max={2.0}
+        step={0.01}
+        onChange={(v) => setNewSpeed(v)}
+        value={newSpeed}
+        isDisabled={!isPlaying}
+      >
+        <SliderMark value={0.5}>0.5x</SliderMark>
+        <SliderMark value={1.0}>1.0x</SliderMark>
+        <SliderMark value={1.5}>1.5x</SliderMark>
+        <SliderMark value={2.0}>2.0x</SliderMark>
+        <SliderTrack>
+          <SliderFilledTrack />
+        </SliderTrack>
+        <SliderThumb />
+      </Slider>
+    </div>
+  );
+}
diff --git a/apps/client/src/theme/_ontimeStyles.scss b/apps/client/src/theme/_ontimeStyles.scss
index 6254e8534..269d3e917 100644
--- a/apps/client/src/theme/_ontimeStyles.scss
+++ b/apps/client/src/theme/_ontimeStyles.scss
@@ -16,6 +16,7 @@ $warning-orange: $orange-500;
 $info-blue: $blue-500;
 $opacity-disabled: 0.4;
 $active-red: $red-700;
+$highlight-orange: $orange-600;
 
 // playback colours
 $playback-start: $green-600;
diff --git a/apps/client/src/theme/ontimeButton.ts b/apps/client/src/theme/ontimeButton.ts
index 826e752de..81fe74913 100644
--- a/apps/client/src/theme/ontimeButton.ts
+++ b/apps/client/src/theme/ontimeButton.ts
@@ -17,7 +17,7 @@ export const ontimeButtonFilled = {
 
 export const ontimeButtonOutlined = {
   backgroundColor: '#2d2d2d', // $gray-1100
-  color: '#e2e2e2', // $blue-400
+  color: '#e2e2e2', // $gray-200
   border: '1px solid rgba(255, 255, 255, 0.10)', // white-10
   _hover: {
     backgroundColor: '#404040', // $gray-1000
@@ -74,5 +74,4 @@ export const ontimeButtonGhosted = {
 export const ontimeButtonSubtleWhite = {
   ...ontimeButtonSubtle,
   color: '#f6f6f6', // $gray-50
-  fontWeight: 600,
 };
diff --git a/apps/client/src/theme/ontimeSlider.tsx b/apps/client/src/theme/ontimeSlider.tsx
new file mode 100644
index 000000000..e283fccb1
--- /dev/null
+++ b/apps/client/src/theme/ontimeSlider.tsx
@@ -0,0 +1,25 @@
+export const ontimeSlider = {
+  thumb: {
+    background: '#f6f6f6', // $ui-white
+    width: '0.25rem',
+  },
+  filledTrack: {
+    background: '#779BE7', // $blue-400
+  },
+  track: {
+    background: '#303030', // $gray-1050
+  },
+  mark: {
+    color: '#b1b1b1', // $label-gray
+    mt: '2',
+    ml: '-2.5',
+    fontSize: 'calc(1rem - 3px)',
+  },
+};
+
+export const ontimeHighlightSlider = {
+  ...ontimeSlider,
+  filledTrack: {
+    background: '#FFAB33', // $highlight-orange
+  },
+};
diff --git a/apps/client/src/theme/theme.ts b/apps/client/src/theme/theme.ts
index 3003fb001..0a0f1d1fd 100644
--- a/apps/client/src/theme/theme.ts
+++ b/apps/client/src/theme/theme.ts
@@ -16,6 +16,7 @@ import { ontimeMenuOnDark } from './ontimeMenu';
 import { ontimeModal } from './ontimeModal';
 import { ontimeBlockRadio, ontimeRadio } from './ontimeRadio';
 import { ontimeSelect } from './ontimeSelect';
+import { ontimeHighlightSlider, ontimeSlider } from './ontimeSlider';
 import { ontimeSwitch } from './ontimeSwitch';
 import { ontimeTab } from './ontimeTab';
 import {
@@ -140,6 +141,12 @@ const theme = extendTheme({
         ontime: { ...ontimeSelect },
       },
     },
+    Slider: {
+      variants: {
+        ontime: { ...ontimeSlider },
+        'ontime-highlight': { ...ontimeHighlightSlider },
+      },
+    },
   },
 });
 
diff --git a/apps/server/src/api-integration/integration.controller.ts b/apps/server/src/api-integration/integration.controller.ts
index ded76835e..e44e4e5b5 100644
--- a/apps/server/src/api-integration/integration.controller.ts
+++ b/apps/server/src/api-integration/integration.controller.ts
@@ -259,6 +259,24 @@ const actionHandlers: Record<string, ActionHandler> = {
     }
     throw new Error('No matching method provided');
   },
+  /* Speed */
+  'calculate-speed': () => {
+    const factor = runtimeService.calculateSpeed();
+    return { payload: factor };
+  },
+  'get-speed': () => {
+    const factor = runtimeService.getSpeed();
+    return { payload: factor };
+  },
+  'set-speed': (payload) => {
+    const speedToSet = numberOrError(payload);
+    const speedSet = runtimeService.setSpeed(speedToSet);
+    return { payload: speedSet };
+  },
+  'reset-speed': () => {
+    const factor = runtimeService.resetSpeed();
+    return { payload: factor };
+  },
   /* Client */
   client: (payload) => {
     assert.isObject(payload);
diff --git a/apps/server/src/services/runtime-service/RuntimeService.ts b/apps/server/src/services/runtime-service/RuntimeService.ts
index 1dc486992..8002ef273 100644
--- a/apps/server/src/services/runtime-service/RuntimeService.ts
+++ b/apps/server/src/services/runtime-service/RuntimeService.ts
@@ -666,6 +666,42 @@ class RuntimeService {
       logger.info(LogOrigin.Playback, `${time > 0 ? 'Added' : 'Removed'} ${millisToString(time)}`);
     }
   }
+
+  /**
+   * Utility calculates the speed factor necessary to finish on time
+   * @returns {number} speed factor needed to meet schedule
+   */
+  public calculateSpeed(): number {
+    return runtimeState.calculateSpeed();
+  }
+
+  /**
+   * @returns {number} speed factor currently applied
+   */
+  public getSpeed(): number {
+    return runtimeState.getSpeed();
+  }
+
+  /**
+   * Applies a speed factor to current timer
+   * @param {number} speed - speed factor
+   * @returns {number} applied speed factor
+   */
+  public setSpeed(speed: number): number {
+    // TODO: validate state
+    // TODO: validate value
+    runtimeState.setSpeed(speed);
+    return runtimeState.getSpeed();
+  }
+
+  /**
+   * Resets the speed of the current timer
+   * @returns {number} applied speed factor
+   */
+  public resetSpeed(): number {
+    runtimeState.resetSpeed();
+    return runtimeState.getSpeed();
+  }
 }
 
 // calculate at 30fps, refresh at 1fps
diff --git a/apps/server/src/stores/__mocks__/runtimeState.mocks.ts b/apps/server/src/stores/__mocks__/runtimeState.mocks.ts
index 7c4d96839..bc4064f1a 100644
--- a/apps/server/src/stores/__mocks__/runtimeState.mocks.ts
+++ b/apps/server/src/stores/__mocks__/runtimeState.mocks.ts
@@ -32,6 +32,7 @@ const baseState: RuntimeState = {
     playback: Playback.Stop,
     secondaryTimer: null,
     startedAt: null,
+    speed: 1,
   },
   _timer: {
     forceFinish: null,
diff --git a/apps/server/src/stores/runtimeState.ts b/apps/server/src/stores/runtimeState.ts
index 3c01871e1..d0ea80a22 100644
--- a/apps/server/src/stores/runtimeState.ts
+++ b/apps/server/src/stores/runtimeState.ts
@@ -350,6 +350,33 @@ export function updateAll(rundown: OntimeRundown) {
   loadBlock(rundown);
 }
 
+export function setSpeed(speed: number) {
+  runtimeState.timer.speed = speed;
+}
+
+export function resetSpeed() {
+  runtimeState.timer.speed = 1.0;
+}
+
+export function getSpeed() {
+  return runtimeState.timer.speed;
+}
+
+export function calculateSpeed() {
+  // TODO: what should this return if no timer is running?
+  if (runtimeState.eventNow !== null) {
+    const timeToDesiredFinish = runtimeState.eventNow.timeEnd - runtimeState.clock;
+    const timeToActualFinish = runtimeState.timer.expectedFinish - runtimeState.clock;
+    const factor = 1 / (timeToDesiredFinish / timeToActualFinish);
+
+    // TODO: this can produce negative speeds (i.e. the desired finish time is in the past)
+    // TODO: should there be some clamping or rounding on this number?
+    return factor;
+  }
+
+  return 1.0;
+}
+
 export function start(state: RuntimeState = runtimeState): boolean {
   if (state.eventNow === null) {
     return false;
@@ -464,6 +491,7 @@ export type UpdateResult = {
 };
 
 export function update(): UpdateResult {
+  const timeSinceLastUpdate = clock.timeNow() - runtimeState.clock;
   // 0. there are some things we always do
   const previousClock = runtimeState.clock;
   runtimeState.clock = clock.timeNow(); // we update the clock on every update call
@@ -490,6 +518,12 @@ export function update(): UpdateResult {
     }
   }
 
+  const catchUpMultiplier = 1 - runtimeState.timer.speed;
+
+  if (runtimeState.timer.playback === Playback.Play) {
+    runtimeState.timer.addedTime += timeSinceLastUpdate * catchUpMultiplier;
+  }
+
   // update timer state
   runtimeState.timer.current = getCurrent(runtimeState);
   runtimeState.timer.expectedFinish = getExpectedFinish(runtimeState);
diff --git a/packages/types/src/definitions/runtime/RuntimeStore.ts b/packages/types/src/definitions/runtime/RuntimeStore.ts
index e9674ace4..45907b938 100644
--- a/packages/types/src/definitions/runtime/RuntimeStore.ts
+++ b/packages/types/src/definitions/runtime/RuntimeStore.ts
@@ -16,6 +16,7 @@ export const runtimeStorePlaceholder: RuntimeStore = {
     playback: Playback.Stop, // change initiated by user
     secondaryTimer: null, // change on every update
     startedAt: null, // change can only be initiated by user
+    speed: 1.0, // change initiated by user
   },
   onAir: false,
   message: {
diff --git a/packages/types/src/definitions/runtime/TimerState.type.ts b/packages/types/src/definitions/runtime/TimerState.type.ts
index 302f4e62e..6c3376450 100644
--- a/packages/types/src/definitions/runtime/TimerState.type.ts
+++ b/packages/types/src/definitions/runtime/TimerState.type.ts
@@ -30,4 +30,6 @@ export type TimerState = {
   secondaryTimer: MaybeNumber;
   /** only if timer has already started */
   startedAt: MaybeNumber;
+  /** the speed of the current timer 1.0 = realtime, 2.0 = double time */
+  speed: number;
 };