Why Plank Making is Profitable in 2026
Construction is one of the most expensive skills in OSRS, and players training it need millions of planks. Most players buy planks directly from the GE rather than making them manually because it saves time. This creates opportunity for you to be the supplier and profit from the convenience markup.
The Plank Make Spell Advantage
Before the Plank Make spell (added in 2006), players had to physically visit the Sawmill operator northeast of Varrock with logs and coins. This was tedious and slow. The Plank Make spell lets you convert logs to planks from anywhere — bank, POH, even GE. This convenience comes at a cost (runes), but the time saved makes it profitable.
At 86 Magic with Dream Mentor completed, you can cast Plank Make which costs 2 Astral runes + 15 Earth runes per plank. The spell also deducts the sawmill fee (250 GP for oak, 500 GP for teak, 1,500 GP for mahogany). Total cost is much lower than buying finished planks from GE, creating your profit margin.
Which Plank Type Makes Most Money?
Oak planks typically have the best GP/hr because you can make 800-900 per hour. Profit is ~150 GP per plank, so 800 × 150 = 120k+ GP/hr. Mahogany planks have higher profit per plank (~300 GP) but you make fewer per hour (600-700) due to higher cost and slower pace, netting similar total GP/hr.
Teak planks are middle ground but generally worst profit because cost and sell price are both mid-tier. Always check current GE prices at GE Tracker before committing to large batches.
Alternative: Butler Method
If you have 50+ Construction, you can use the Demon Butler in your POH to make planks. This is faster than Sawmill but slower than Plank Make spell. Butler charges 10k per 26 planks unnoted, which cuts into profit. Only worth it if you don't have 86 Magic yet.
When NOT to Make Planks
If log prices spike or plank prices crash, margins disappear. For example, if oak logs jump to 40 GP and oak planks drop to 420 GP, your profit per plank falls from 150 GP to 80 GP — not worth the time. Check prices daily and only make planks when margins are healthy (100+ GP per plank minimum).
Related Methods
Other Lunar spellbook money makers include String Jewellery (converting jewelry into wearable forms), Tan Leather (converting hides to leather), and Superglass Make (making molten glass). All follow similar arbitrage model: buy raw materials, process with spell, sell finished product for profit.