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1% chance per rank to deal 1% extra damage per rank, at the cost of 1 gold coin per extra point of damage dealt.
Release date 25 January 2016 (Update)
Gizmo type Weapon
Maximum rank 5

Spendthrift is an Invention perk that has a chance to deal extra damage, but at the cost of consuming coins. It can be created in weapon gizmos.

The exact effects of spendthrift are difficult to calculate as damage is not evenly distributed; however, rough calculations of its effects can be created if a scenario is created where every attack does the same amount of damage.

For the table below, a rate of 100,000 damage per minute spread across 50 attacks has been used.

Spendthrift does not increase the damage from bleed attacks, such as Dismember. Spendthrift will first take coins from your inventory, and then coin pouch.

When the perk triggers, it prompts the message:

Spendthrift has activated and dealt an additional [xxx] damage, costing that amount in coins too!
Cost of spendthrift
Rank Chance Damage/Attack
DPM Cost/Minute (per hour)
None 0% 2,000.0 100,000 0 0
1 1% 2,000.2 100,010 10 600
2 2% 2,000.8 100,040 40 2,400
3 3% 2,001.8 100,090 90 5,400
4 4% 2,003.2 100,160 160 9,600
5 5% 2,005.0 100,250 250 15,000


MaterialRarityPerk ranks with X materials
Magic parts.png
Magic partsCommon00011–2
Precious components.png
Precious componentsUncommon011–21–31–4
Saradomin components.png
Saradomin componentsRare01–22–33–45
Fortunate components.png
Fortunate componentsRare01–21–31–41–5