Mastery

Mastery is a secondary system of levels tied to individual items within a skill. Each item in a non-combat skill (with the exception of

Mastery

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Alt. Magic

spells) has a level associated with it.

The bonuses unlocked by leveling Mastery depend on the specific skill the Mastery is associated with. To see a full list of bonuses for a given skill, check the in-game Mastery section of the completion log, or visit the wiki page for that skill.

Earning Mastery XP

Each time a player completes an action with an associated Mastery Level, they will receive Mastery XP for that item. The XP per action calculation is:

[math]\displaystyle{ \Biggl \lfloor \biggl[ \Bigl( \text{Unlocked Actions} \times \frac{\text{Player Total Mastery for Skill}}{\text{Total Mastery for Skill}} \Bigr) + \Bigl( \text{Item Mastery Level} \times \frac{\text{Total Items in Skill}}{10} \Bigr) \biggr] \times \text{Action Time} \times 0.5 \times \left ( 1 + \text{Bonus} \right ) \Biggr \rfloor }[/math]

Where:

Unlocked Actions is the number of actions the player has unlocked for the relevant skill. The mastery actions for a skill can be seen in game by either clicking the "Spend Mastery Pool XP" button on the skill's page, or by clicking "Progress" for the skill within the mastery section of the completion log - note however that this does display all mastery actions, not just those that the player has met the skill level requirement for.
Player Total Mastery for Skill and Total Mastery for Skill are both numbers shown on each skill tile within the mastery section of the completion log
Item Mastery Level is the mastery level of the item/action currently being crafted/performed
Total Items in Skill is the number of items/actions within the relevant skill, and can also be expressed as [math]\displaystyle{ \tfrac{\text{Total Mastery for Skill}}{99} }[/math]
Action Time varies depending on the skill:
- For
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  Farming, this is the amount of time (in hours) it took the crop to grow
- For gathering skills (
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  Woodcutting,
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  Mining,
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  Agility,
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  Thieving,
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  Fishing and
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  Astrology), this is the number of seconds taken to complete the action. As a result for these skills the Mastery XP gained per second remains the same even when the action time is decreased, however it is still worth reducing the action time to increase the amount of resources gained over time
- For artisan skills (which consume resources to produce items), the action time is a fixed value regardless of the actual time it takes the player to complete an action. Therefore for these skills, reducing the action time increases the Mastery XP gained per second:

Skill	Seconds per Action
Error creating thumbnail: File missing Firemaking	60% of the log's base burn interval
Error creating thumbnail: File missing Cooking	85% of the recipe's base cooking interval
Error creating thumbnail: File missing Smithing	1.7
Error creating thumbnail: File missing Fletching	1.3
Error creating thumbnail: File missing Crafting	1.65
Error creating thumbnail: File missing Runecrafting	1.7
Error creating thumbnail: File missing Herblore	1.7
Error creating thumbnail: File missing Summoning	4.85

Bonus is the percentage increase to experience gained. All available bonuses are detailed within the Bonuses section below

Also note the following

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Farming

specific details:

To arrive at the mastery XP granted by harvesting a plot, the result of the above formula requires a couple of adjustments: First the result should be multiplied by the quantity harvested, and then divided by an adjustment factor (3 for allotment & herb patches, 10 for trees)
Each plot harvested counts as its own action, therefore in the case where the player harvests multiple plots simultaneously using the "Harvest All" button the mastery XP gained from each plot is calculated individually, taking into account mastery level increases between each plot harvested

In other words, there are two main factors that are added together to determine the XP per action:

The first is based on how many total Mastery levels the player has in the skill. Each item in a skill adds up to +1 to this factor depending on its current Mastery level.
The second is based on the Mastery level of the specific item gaining XP multiplied by one tenth of the total number of items in the skill.

After both of these factors are added together, they are multiplied by half of the time per action as measured in seconds.

There are three important takeaways from this:

Mastery XP per action increases substantially as Mastery level in an item increases.
Mastery XP is gained much more quickly for skills with a lot of items (such as
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Smithing) than it is for skills with only a few (such as
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Woodcutting).
Decreasing the action time is always beneficial: For artisan skills doing so can significantly increase the rate of Mastery XP gained, while for gathering skills this increases the rate of resources gained.

Bonuses

Aside from increasing the factors mentioned in the formula above, there are several ways to increase the Mastery XP gained:

Name	Description
Ancient Ring of Mastery	The Ancient Ring of Mastery is a rare drop that can be found while Error creating thumbnail: File missing Fishing. It increases Mastery XP gained by 7%.
Clown Hat	The Clown Hat can be purchased from the Error creating thumbnail: File missing Township section of the Shop. It provides a +10% bonus to Mastery XP at a cost of reducing Skill XP by 5% and resource preservation chance by 10%.
Skillers Outfit	When all four pieces of the skillers outfit are equipped, Mastery XP for all skills is increased by 8%.
Error creating thumbnail: File missing Firemaking	Each Firemaking item at level 99 Mastery grants +0.25% Mastery XP to other skills. In addition, reaching the 95% Mastery Pool Checkpoint for Firemaking increases global Mastery XP by +5%.
Pets	Once acquired, multiple pets provide a Mastery XP bonus: Error creating thumbnail: File missing Ty provides +3%, Saki provides +1%, Party Rock provides +4% and Harold provides +5%.
Mastery Pool Checkpoints	The 10% Mastery Pool checkpoint for each skill (except Error creating thumbnail: File missing Thieving) is a +5% bonus to Mastery XP gained for that skill.
Error creating thumbnail: File missing Agility Obstacles	Several Agility Obstacles provide bonuses to Mastery XP for one or more skills. However, others will reduce the amount of Mastery XP earned, so players focused on levelling Mastery should make sure their Agility course isn't slowing them down.
Error creating thumbnail: File missing Astrology Modifiers	Astrology can give you a buff of up to 8% Mastery XP for most skills. The Error creating thumbnail: File missing Rosaniya constellation also adds up to 5% global Mastery XP.

The Mastery Pool

Whenever the player gains Mastery XP, 25% of the amount received is also added to the Mastery Pool for that skill. After Skill level 99, the "Skill Mastery" perk increases this to 50% of the item's Mastery XP. The maximum Mastery Pool XP for a given skill is equal to 500,000 multiplied by the total number of items in that skill.

Mastery XP Pool has two uses:

First, it can be spent to level up any item mastery for a skill. Mastery Pool XP spent this way is converted to item mastery XP at a 1:1 rate.

Second, Checkpoints are reached when the Mastery Pool reaches 10%, 25%, 50%, and 95% filled. These bonuses vary by skill, but are often quite powerful. Checkpoints only remain active as long as the Mastery Pool has enough XP in it to meet the requirement - If enough Mastery Pool XP is spent on levelling items to dip below the threshold for a given checkpoint, the bonus will be lost until enough XP is gained to reach it again.

Mastery tokens can be claimed from either the bank or the spend mastery XP interface, doing so fills the Mastery Pool for the relevant skill by 0.1% of the maximum pool XP.

The cap of the mastery pool can be increased with Cape of Completion or Harold, which increase the pool cap by 25% and 50% respectively. Increasing the pool cap makes it easier to maintain the 95% checkpoint bonus without risking the mastery pool completely filling while training a skill.

Mastery Level XP

Mastery Experience follows the same XP progression as skills do.

The experience difference between level [math]\displaystyle{ L-1 }[/math] and level [math]\displaystyle{ L }[/math] is approximately [math]\displaystyle{ \left\lfloor \frac{1}{4} \left( L-1+300\times 2^{\frac{L-1}{7}} \right) \right\rfloor }[/math]. The table below shows this experience difference for each level and also the cumulative experience from level 1 to level [math]\displaystyle{ L }[/math]. Note that experience levels are nonlinear and so the amount of experience between 1 and 92 is the same as the amount of experience between 92 and 99. Experience also doubles about every 7 levels. For example, the experience between 7 and 8 is 138 and the experience between 14 and 15 is 274, which is roughly double.

Skill Exp Table

The base game has a maximum skill and

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Mastery

level of 99, with the Throne of the Herald Expansion the skill level maximum is increased to 120.

Level	XP	Difference	Level	XP	Difference	Level	XP	Difference	Level	XP	Difference	Level	XP	Difference
1	0	0	26	8,740	898	51	111,945	10,612	76	1,336,443	126,022	101	15,889,109	1,497,949
2	83	83	27	9,730	990	52	123,660	11,715	77	1,475,581	139,138	102	17,542,976	1,653,867
3	174	91	28	10,824	1,094	53	136,594	12,934	78	1,629,200	153,619	103	19,368,992	1,826,016
4	276	102	29	12,031	1,207	54	150,872	14,278	79	1,798,808	169,608	104	21,385,073	2,016,081
5	388	112	30	13,363	1,332	55	166,636	15,764	80	1,986,068	187,260	105	23,611,006	2,225,933
6	512	124	31	14,833	1,470	56	184,040	17,404	81	2,192,818	206,750	106	26,068,632	2,457,626
7	650	138	32	16,456	1,623	57	203,254	19,214	82	2,421,087	228,269	107	28,782,069	2,713,437
8	801	151	33	18,247	1,791	58	224,466	21,212	83	2,673,114	252,027	108	31,777,943	2,995,874
9	969	168	34	20,224	1,977	59	247,886	23,420	84	2,951,373	278,259	109	35,085,654	3,307,711
10	1,154	185	35	22,406	2,182	60	273,742	25,856	85	3,258,594	307,221	110	38,737,661	3,652,007
11	1,358	204	36	24,815	2,409	61	302,288	28,546	86	3,597,792	339,198	111	42,769,801	4,032,140
12	1,584	226	37	27,473	2,658	62	333,804	31,516	87	3,972,294	374,502	112	47,221,641	4,451,840
13	1,833	249	38	30,408	2,935	63	368,599	34,795	88	4,385,776	413,482	113	52,136,869	4,915,228
14	2,107	274	39	33,648	3,240	64	407,015	38,416	89	4,842,295	456,519	114	57,563,718	5,426,849
15	2,411	304	40	37,224	3,576	65	449,428	42,413	90	5,346,332	504,037	115	63,555,443	5,991,725
16	2,746	335	41	41,171	3,947	66	496,254	46,826	91	5,902,831	556,499	116	70,170,840	6,615,397
17	3,115	369	42	45,529	4,358	67	547,953	51,699	92	6,517,253	614,422	117	77,474,828	7,303,988
18	3,523	408	43	50,339	4,810	68	605,032	57,079	93	7,195,629	678,376	118	85,539,082	8,064,254
19	3,973	450	44	55,649	5,310	69	668,051	63,019	94	7,944,614	748,985	119	94,442,737	8,903,655
20	4,470	497	45	61,512	5,863	70	737,627	69,576	95	8,771,558	826,944	120	104,273,167	9,830,430
21	5,018	548	46	67,983	6,471	71	814,445	76,818	96	9,684,577	913,019
22	5,624	606	47	75,127	7,144	72	899,257	84,812	97	10,692,629	1,008,052
23	6,291	667	48	83,014	7,887	73	992,895	93,638	98	11,805,606	1,112,977
24	7,028	737	49	91,721	8,707	74	1,096,278	103,383	99	13,034,431	1,228,825
25	7,842	814	50	101,333	9,612	75	1,210,421	114,143	100	14,391,160	1,356,729