Experience

Killing monsters and fulfilling certain tasks will grant players experience (also known as xp, exp) which they can accumulate to increase their levels in professions. Players will start a profession with zero experience, and are able to level their professions to level 500.

Experience table

The following table shows the relationship between the profession level, the experience required for that level, and the experience difference from the previous level:

Level	Experience	XP needed for level up	Knowledge XP
Novice
0	0	500
1	500	515
2	1,015	530
3	1,545	545
4	2,090	561
5	2,651	578
6	3,229	1,189
7	4,418	1,224
8	5,642	1,260
9	6,902	1,297
10	8,199	1,335
11	9,534	1,374
12	10,908	2,828
13	13,736	2,911
14	16,647	2,997
15	19,644	3,084
16	22,728	3,175
17	25,903	3,268
18	29,171	3,364
19	32,535	3,462
Apprentice
20	35,997	17,818	+4455 XP
21	53,815	18,164	+4542 XP
22	71,979	18,517	+4630 XP
23	90,496	18,877	+4720 XP
24	109,373	19,244	+4812 XP
25	128,617	19,619	+4905 XP
26	148,236	20,000	+5000 XP
27	168,236	20,389	+5098 XP
28	188,625	20,785	+5197 XP
29	209,410	21,189	+5298 XP
30	230,599	21,601	+5401 XP
31	252,200	22,011	+5506 XP
32	274,221	22,449	+5613 XP
33	296,670	22,886	+5722 XP
34	319,556		+5833 XP
35	342,887		+5833 XP
36	366,671		+5947 XP
37	390,918		+6062 XP
38	415,636		+6180 XP
39	440,834		+6300 XP
40	466,522		+6423 XP
41	492,710		+6547 XP
42	519,407		+6675 XP
43	546,623		+6804 XP
44	574,368		+6937 XP
45	602,652		+7072 XP
46	631,486		+7209 XP
47	660,881		+7349 XP
48	690,847		+7492 XP
49	721,396		+7638 XP
Journeyman
50	752,539		+7938 XP
51	784,287		+8092 XP
52	816,652		+8249 XP
53	849,646		+8409 XP
54	883,282		+8573 XP
55	917,572		+8740 XP
56	952,528		+8909 XP
57	988,164		+9083 XP
58	1,024,493		+9259 XP
59	1,061,528		+9439 XP
60	1,099,283		+9623 XP
61	1,137,772		+9810 XP
62	1,177,009		+10000 XP
63	1,217,009		+10195 XP
64	1,257,787		+10393 XP
65	1,299,357		+10595 XP
66	1,341,736		+10801 XP
67	1,384,938		+11011 XP
68	1,428,980		+11225 XP
69	1,473,878		+11443 XP
70	1,519,649		+11666 XP
71	1,566,310		+11893 XP
72	1,613,878		+12124 XP
73	1,662,371		+12359 XP
74	1,711,807		+12600 XP
75	1,762,204		+12845 XP
76	1,813,581		+13094 XP
77	1,865,956		+13349 XP
78	1,919,350		+13608 XP
79	1,973,782		+13873 XP
80	2,029,272		+14143 XP
81	2,085,841		+14418 XP
82	2,143,509		+14698 XP
83	2,202,298		+14984 XP
84	2,262,230		+15275 XP
85	2,323,327		+15572 XP
86	2,385,612		+15875 XP
87	2,449,108		+16183 XP
88	2,513,838		+16498 XP
89	2,579,827		+16818 XP
90	2,647,099		+17145 XP
91	2,715,679		+17479 XP
92	2,785,592		+17818 XP
93	2,856,864		+18165 XP
94	2,929,521		+18518 XP
95	3,003,591		+18878 XP
96	3,079,101		+19245 XP
97	3,156,079		+19619 XP
98	3,234,553		+20000 XP
99	3,314,553		+20389 XP
Adept
100	3,396,108		+20786 XP
117	5,052,218		+28285 XP
125	6,040,195		+33636 XP
150	10,319,013		+54432 XP
175	17,243,259		+88085 XP
Expert
200	28,448,494		+142544 XP
210	51,859,319		+150151 XP
225	89,611,386		+164689 XP
250	160,276,100		+190274 XP
275	241,918,762		+219833 XP
300	336,244,832		+253985 XP
325	445,224,715		+293442 XP
337	503,395,645		+312692 XP
350	571,134,915		+339029 XP
375	716,605,603		+391698 XP
400	884,675,555		+452549 XP
425	1,078,855,621		+522854 XP
450	1,303,202,085		+604080 XP
475	1,562,401,381		+697925 XP
Ultimate
500	1,861,867,939		+801706 XP

Required experience amount breakpoints

Based on the above table, we can notice a few breakpoints in the experience formula:

For the sake of being rigorous, the following data has been observed based on an incomplete chart, not datamined.

Novice:

Levels 0-6 : every level requires around 2,95% more experience than the previous one;

Levels 7-12: every level still requires 2,95% more experience, but the required experience is also doubled;

Levels 13-20: again, every level requires 2,95% more experience, but it is once again doubled.

For example, going from level 13 to level 14 requires slightly more than 4x the experience required from level 4 to level 5.

Apprentice to expert:

Levels 21-200: the required experience, per level, has been quintupled (explaining why you suddenly feel like you hit a wall once you are at skill level 20), and every new level from 21 to 200 requires 1,94% more experience than the previous one.

Expert to ultimate:

Levels 201-500: the required experience per level is once again quadrupled, then every new level requires around 0,60% more experience than the previous one.

To say it differently: at level 20, you've got 4,8% of the experience to level 50, 1% of the experience to level 100, 0,13% of the experience to level 200 and 0,002% of the experience to level 500.

At level 100, you've got 12% of the experience to level 200, and 0,2% of the experience to level 500.

At level 200, you've got 1,5% of the experience to level 500.

At level 350, you've got 30,7% of the experience to level 500.

Conclusions:

While I haven't checked the increase in experience gained per action yet, I assume it follows a fairly similar formula regarding the percentage increases, but completely ignores the multipliers at specific breakpoints. It'd mean that you have indirect penalties if you do underleveled content, but that each level takes a similar amount of actions if you do "on-level" content (barring the breakpoint multipliers).

Levels 0-20 are certainly made easier for the sake of allowing players to explore new professions quickly.

Levels 21-200 look like the intended regular levels, requiring some dedication.

Finally, levels 201+ require an absurd amount of experience and are likely here to make sure players end up specializing in something if they want to pursue leaderboards and the ultimate cape.

Additional data needed:

Providing exp gained per action isn't quadrupled either for levels 201+, it would be interesting to know whether converting knowledge into experience ends up being the fastest way to level past this point, considering knowledge conversion seems to be granting around 20-25% of a full level. I don't have a high level skill personally so additional data would be very helpful.