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Cooldown reduction

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Cooldown reduction (abbreviated as CDR) is a champion statistic that reduces the cooldown of abilities, or the amount of time you must wait before an ability can be used again once you activated it, by a percentage.

Cooldown reduction is granted by items, buffs, runes and masteries, as well as some passive abilities.

Cooldown reduction stacks additively. For example, if you have 5% cooldown reduction from masteries and 10% cooldown reduction from Stinger item.png Stinger, you will have 15% cooldown reduction.

  • Cooldown reduction cannot be increased beyond 40%.

Cooldown reduction is determined at the moment an ability is activated. Increasing/decreasing your cooldown reduction while the skill is on cooldown will not affect the cooldown.

Cooldown reduction does not apply on item active abilities such as that of Locket of the Iron Solari item.png Locket of the Iron Solari or item passive effects with cooldowns such as that of Guardian Angel item.png Guardian Angel. Most sources of cooldown reduction also do not apply on summoner spells unless specifically stated, e.g. the unique enchantment effect of Distortion item.png Distortion for boots. Cooldown Reduction does not apply to an Innate Ability of any kind.

Kindlegem item.png Kindlegem has been quoted by a Rioter to be the item of which cooldown reduction's gold value has been derived from. Cooldown reduction has the theoretical gold value of 31.67 Gold per unit. This yields about 317 gold for items with 10% CDR, 475 gold for 15% CDR, and 633 gold for 20% CDR.

Increasing cooldown reduction

Items

  • Ardent Censer item.png Ardent Censer: +10% cooldown reduction, +40 ability power, +100% base mana regeneration. Unique Passive: +8% movement speed. Unique Passive: Your heals and shields on another unit grant them 15% attack speed and 30 magic damage on-hit for 6 seconds. 2100 gold.
  • Athene's Unholy Grail item.png Athene's Unholy Grail: +20% cooldown reduction, +60 ability power, +25 magic resist, +100% base mana regeneration. Unique Passive: Restores 30% of your maximum mana on kill or assist. Unique Passive – Mana Font: Restores 2% of missing mana every 5 seconds. 2700 gold.
  • Banner of Command item.png Banner of Command: +10% cooldown reduction, +200 health, +60 ability power, +20 magic resist. Unique Aura – Legion: Grants nearby allies +20 magic resist and +75% base health regen. Unique Active – Promote: Greatly increases the power of a lane minion and grants it immunity to magic damage (120 second cooldown) (1200 range). 3000 gold.
  • Essence Reaver item.png Essence Reaver: 10% cooldown reduction, +80 attack damage, +10% life steal. Unique Passive: Basic attacks restore between 2% and 8% of the physical damage dealt as mana, based on your missing mana. 3200 gold.
  • Face of the Mountain item.png Face of the Mountain: +10% cooldown reduction, +500 health, +100% base health regeneration. Unique Passive – Spoils of War: Melee basic attacks execute minions below 400 + (100% AD) health. Killing a minion by any means heals yourself and the nearest allied champion for 50 + (1% of your maximum health) health and grants them kill gold. These effects require a nearby allied champion and consume a charge. Recharges every 30 seconds for a maximum of 4 charges. Unique Active: Shield target ally for 10% of your maximum health for 4 seconds. After 4 seconds, the shield explodes, dealing (100% of the target's AD) + (30% of the target's AP) magic damage, regardless of if the shield remained intact (60 second cooldown). You may only be in possession of 1 Gold Income item. 2200 gold.
  • Fiendish Codex item.png Fiendish Codex: Unique Passive: +10% cooldown reduction. +30 ability power. 820 gold.
  • Forbidden Idol item.png Forbidden Idol: Unique Passive: +10% cooldown reduction, +50% base mana regeneration. 600 gold.
  • Frost Queen's Claim item.png Frost Queen's Claim: +10% cooldown reduction, +50 ability power, +50% base mana regeneration, +2 gold per 10 seconds. Unique Passive – Tribute: Spells and basic attacks against champions or buildings deal 15 additional damage and grant 10 gold. This can occur up to 3 times every 30 seconds. Unique Active: Fires an ice lance that explodes dealing 50 + (5 × level) magic damage to nearby enemies and slowing their movement speed by 80%, decaying over 2 seconds (850 range) (225 radius) (60 second cooldown). You may only be in possession of 1 Gold Income item. 2200 gold.
  • Frozen Heart item.png Frozen Heart: +20% cooldown reduction, +100 armor, +400 mana. Unique Aura: Reduces the attack speed of nearby enemies by 15% (700 range). 2450 gold.
  • Glacial Shroud item.png Glacial Shroud: Unique Passive: +10% cooldown reduction, +20 armor, +250 mana. 950 gold.
  • Iceborn Gauntlet item.png Iceborn Gauntlet: +10% cooldown reduction, +60 armor, +30 ability power, +500 mana. Unique Passive – Spellblade: After using an ability, the next basic attack (on hit) deals 125% base AD bonus physical damage to enemies near the target, and creates a field around the target for 2 seconds that slows enemy movement speed by 30% (1.5 second cooldown) (half-sized field if ranged). 2900 gold.
  • Ionian Boots of Lucidity item.png Ionian Boots of Lucidity: Unique Passive: +15% cooldown reduction. Unique Passive – Enhanced Movement: +45 movement speed. 1000 gold.
  • Kindlegem item.png Kindlegem: Unique Passive: +10% cooldown reduction. +200 health. 850 gold.
  • Locket of the Iron Solari item.png Locket of the Iron Solari: +10% cooldown reduction, +400 health, +20 magic resistance. Unique Aura – Legion: Grants nearby allies +20 magic resist and +75% base health regeneration. Unique Active: Shield yourself and nearby allies for 5 seconds, absorbing up to 50 + (10 × level) damage (60 second cooldown). 2800 gold.
  • Mikael's Crucible item.png Mikael's Crucible: +10% cooldown reduction, +40 magic resist, +100% base mana regeneration. Unique Passive – Mana Font: Restores 2% of missing mana every 5 seconds. Unique Active: Removes all stuns, roots, taunts, fears, silences and slows on an allied champion and heals that champion for 150 + (10% of the targetmaximum health) (180 second cooldown). 2450 gold.
  • Morellonomicon item.png Morellonomicon: +20% cooldown reduction, +80 ability power, +100% base mana regeneration. nique Passive: Dealing magic damage to an enemy champion below 40% health inflicts Grievous Wounds icon Grievous Wounds to them for 4 seconds. 2300 gold.
  • Nashor's Tooth item.png Nashor's Tooth: Unique Passive: +20% cooldown reduction. +50% attack speed, +60 ability power. Unique Passive: Basic attacks deal 15 + (15% AP) bonus magic damage on hit. 2920 gold.
  • Spirit Visage item.png Spirit Visage: +10% cooldown reduction, +400 health, +55 magic resistance, +100% base health regen. Unique Passive: Increases effectiveness of self-healing, health regen, life steal and spell vamp by 20%. 2750 gold.
  • Stinger item.png Stinger: Unique Passive: +10% cooldown reduction. +40% attack speed. 1250 gold.
  • Talisman of Ascension item.png Talisman of Ascension: +10% cooldown reduction, +100% base health regeneration, +100% base mana regeneration, +20 movement speed, +2 gold per 10 seconds. Unique Passive – Favor: Grants 4 gold and restores 10 health each time a nearby enemy minion dies that you didn't kill (1400 range). Unique Active: Grants nearby allies +40% movement speed for 3 seconds (40 second cooldown) (600 range). You may only be in possession of 1 Gold Income item. 2200 gold.
  • The Black Cleaver item.png The Black Cleaver: +20% cooldown reduction, +400 health, +40 attack damage. Unique Passive: Dealing physical damage to an enemy champion Cleaves them, reducing their armor by 5% for 6 seconds (stacks up to 6 times, up to 30%). Unique Passive – Rage: Dealing physical damage grants 20 movement speed for 2 seconds. Assists on Cleaved enemy champions or kills on any unit grant 60 movement speed for 2 seconds instead. This movement speed bonus is halved for ranged champions. 3000 gold.
  • The Brutalizer item.png The Brutalizer: Unique Passive: +10% cooldown reduction. +25 attack damage. Unique Passive: +10 armor penetration. 1337 gold.
  • Twin Shadows item.png Twin Shadows: +10% cooldown reduction, +80 ability power, +6% movement speed. Unique Active – Hunt: Summons up to 2 invulnerable ghosts that seek out the 2 nearest enemy champions for 6 seconds. If a ghost reaches its target, it reveals the target and reduces their movement speed by 40% for 2.5 seconds. If a ghost cannot find a target, it tries to return to the caster. Ghosts that successfully return in this way reduce the item's cooldown by 20 / 40 seconds (60 / 120 second cooldown). 2400 gold.
  • Will of the Ancients item.png Will of the Ancients: +10% cooldown reduction, +80 ability power. Unique Passive: +20% spell vamp. 2500 gold.
  • Youmuu's Ghostblade item.png Youmuu's Ghostblade: +10% cooldown reduction, +30 attack damage, +15% critical strike chance. Unique Passive: +20 armor penetration. Unique Active: Grants +20% movement speed and +40% attack speed for 6 seconds (45 second cooldown). 2700 gold.
  • Zeke's Herald item.png Zeke's Herald: +20% cooldown reduction, +250 health. Unique Aura: Grants nearby allied champions +10% life steal and +20 attack damage. 2450 gold.
  • Zephyr item.png Zephyr: +10% cooldown reduction, +25 attack damage, +50% attack speed, +10% movement speed. Unique Passive – Tenacity: Reduces the duration of stuns, slows, taunts, fears, silences, blinds and immobilizes by 35%. 2850 gold.

Variable Availability

  • CH Hextech Sweeper item.png Hextech Sweeper: +20% cooldown reduction, +225 health, +250 mana, +25 armor. Unique Passive – Trap Detection: Nearby stealthed enemy traps are revealed. Unique Active – Hunter's Sight: A stealth-detecting mist grants vision in the target area for 5 seconds, revealing enemy champions that enter for 3 seconds (60 second cooldown). 2130 gold.
  • S Mejai's Soulstealer item.png Mejai's Soulstealer: At 20 stacks, grants +15% cooldown reduction. +20 ability power. Unique Passive: Grants +8 ability power per stack and 5 stacks upon first purchase. Grants 2 stacks for a kill or 1 stack for an assist (max 20 stacks). Half of the stacks are lost upon death. 1400 gold.

Champion abilities

Masteries

  • Sorcery mastery s4.png Sorcery increases cooldown reduction by 1.25 / 2.5 / 3.75 / 5%.
  • Intelligence mastery s4.png Intelligence increases cooldown reduction by 2 / 3.5 / 5%.

Runes

Name Type Tier 1 (Lesser) Tier 2 (Normal) Tier 3 (Greater)
Cooldown reduction Mark

GMarks (1)

X X 0.2 %

410 IP

Seal

GSeals (1)

X X 0.36 %

410 IP

Glyph

GGlyphs (1)

0.47 %

5 IP

0.67 %

35 IP

0.83 %

820 IP

Quintessence

GQuintessences (1)

1.4 %

15 IP

1.95 %

100 IP

2.5 %

2050 IP

Cooldown Reduction, Scaling

(Cooldown Reduction per level)

Mark X X X
Seal X X X
Glyph

GGlyphs (2)

X X 0.09 % per level (1.67 %)

410 IP

Quintessence

GQuintessences (2)

X X 0.28 % per level (5 %)

1025 IP

Neutral buffs

Lowering cooldowns

Some champions have abilities that decrease their cooldowns by a flat amount, either their base cooldown or current cooldown, or entirely refresh their cooldown. Base reduction occurs before cooldown reduction takes effect while flat reduction occurs after cooldown reduction takes effect. By using those, a champion can disregard the 40% cooldown reduction cap.

Note: Only the cooldown reduction of these abilities is shown here, to read more information on each of these abilities, follow the link on each of them.

Base reduction

Flat reduction

Percentage reduction

  • GnarSquare.png Gnar's Boomerang Throw.png Boomerang Throw cooldown is reduced by 45 / 50 / 55 / 60% if he can catch it when its return (scales with GNAR!.png GNAR!'s level).
    • Boulder Toss.png Boulder Toss cooldown is reduced by 60% if he picks up his boulder after using the ability.
  • MasterYiSquare.png Master Yi's Highlander.png Highlander's passive component allows him to reduce the current cooldown on all of his basic abilities by 70% for every kill or assist he scores.
  • YasuoSquare.png Yasuo's Steel Tempest.png Steel Tempest's cooldown is reduced by 1% for every 1.72% bonus attack speed he has.
  • ChoGathSquare.png Cho'Gath's Feast.png Feast's cooldown is reduced by 50% if it kills a minion or monster.

Cooldown refreshing


Trivia

[Last updated 29/6/2015 on patch 5.12]

One cost and efficient way to reach maximum cooldown reduction (40%) is:

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