D&D Action Economy Explained (5e): Actions, Bonus Actions, and Reactions

16 May 2026

Veterans say action economy like it is a law of physics. New players hear it and picture a spreadsheet. Both are half right.

Action economy is simply: who gets to do how much, and when. Fifth edition gives each creature a small budget each round. Spend it well and a modest character feels heroic. Waste it and a high-level sheet still stumbles.

If you are learning the fight loop cold, read how D&D combat works first. This article is the zoom-in on what you spend.

One turn, four pockets (usually)

On your turn, you typically juggle:

Free object interaction (draw a weapon, open a door) rides along once per turn unless you spend an action for more.

Your action is the headline

The action is the main decision. Common choices:

• Attack (weapon or unarmed)
• Cast a spell (casting time 1 action)
• Dash, Disengage, Dodge, Help, Hide, Ready, Search, Use an Object

If nothing on your sheet says you can do it as an action, you probably cannot.

Movement + action combos: dodge, dash, disengage.

Bonus actions are coupons, not a second action

You get at most one bonus action per turn, and only when a feature or spell grants one.

• Rogue Cunning Action
• Healing word (bonus action cast)
• Two-weapon fighting’s extra attack
• Many class features

“I bonus action to…” without a rule is the most common economy mistake after “I full attack twice because I have two weapons.”

Full tour: bonus actions in D&D 5e.

Reactions happen off-turn

A reaction is one per round, refreshed at the start of your next turn.

Triggers include:

• Opportunity attack (foe leaves your reach)
• Ready action going off
• Shield, counterspell, and subclass timing

Hoarding your reaction “for later” and never firing it is a silent DPS leak.

Deep dive: how reactions work.

Movement is not an action (but it competes)

Moving costs feet of speed, not your action. You can move, attack, move if you have speed left.

Costs that surprise new players:

• Standing from prone: half your speed
• Difficult terrain: 2 feet of movement per foot moved
• Grappled: speed 0

Readied actions vs bonus actions vs reactions

Ready (action on your turn): choose action + trigger. When trigger happens, you spend reaction to do it. Your turn then ends for action purposes.

You cannot Ready a bonus action you do not have. You cannot turn a normal action into two bonus actions.

Read: ready action.

Why action economy wins fights

Four level 3 PCs get roughly four actions and four reactions per round (plus movement and bonus actions sprinkled in). One adult dragon gets one turn but hits like a truck.

Designers balance monsters and classes around scarcity:

• Control eats actions (grapple, stun, fear)
• AoE punishes clustered turns
• Healing word trades spell power for speed (bonus action)

When players complain a boss died too fast, action economy often explains it: five turns of focused fire beats one big stat block unless the block interrupts.

Table habits that keep economy crisp

Players

• Declare action + target in one breath: “Attack goblin A with longsword.”
• Pre-pick bonus action on your turn if you have one.
• Say when your reaction is “open” after you use it.

DMs

• Remind once per session: one bonus action, one reaction per round.
• NPCs use the same limits; that is why minions matter.

Everyone

• When in doubt, read the feature. If it does not say bonus action or reaction, it is probably an action.

Keep studying

Full combat walkthrough: how D&D combat works. Faster fights at the table: run combat faster. Two-weapon confusion: two-weapon fighting.