Rules edition: This guide uses the 2014 Fighter and multiclassing rules. The revised 2024 rules use different class features and character-building options; do not mix their progression with the examples here.
Fighter levels can add armor and weapon training, a Fighting Style, Action Surge, and a Martial Archetype to another class. The tradeoff is slower progress in both classes. Choose a multiclass because a particular feature supports your character’s plan, then compare that delay with what your main class would gain at the same total character level.
Check ability-score prerequisites
Under the 2014 rules, you need at least 13 in the required ability scores for both your existing class and the new class. To take Fighter levels, you need Strength 13 or Dexterity 13. The second class may add another requirement: Paladin requires Strength 13 and Charisma 13; Ranger requires Dexterity 13 and Wisdom 13; Wizard requires Intelligence 13; and Barbarian requires Strength 13. Check the exact list for your chosen class before planning a split.
Know what a Fighter level gives
If Fighter is your first class, you receive its starting proficiencies, including heavy armor and Constitution saving throws. If you multiclass into Fighter later, you gain a narrower proficiency list: light armor, medium armor, shields, simple weapons, and martial weapons. You do not gain the Fighter’s starting equipment or saving-throw proficiencies from the multiclass.
Track features by class level, not total character level. Fighter 1 grants Second Wind and a Fighting Style; Fighter 2 grants Action Surge; Fighter 3 grants a Martial Archetype; Fighter 4 grants an Ability Score Improvement; and Fighter 5 grants Extra Attack. The Fighter gains additional Extra Attack improvements at Fighter levels 11 and 20. A multiclass character receives those features only after reaching the listed Fighter level, so early dips delay them.
Extra Attack features from different classes do not add together. If your Fighter and another class both grant Extra Attack, follow the multiclass rule rather than counting both features. Compare the new class’s other benefits against the attacks, subclass features, and Ability Score Improvements you postpone.
Understand Action Surge in a multiclass
Action Surge at Fighter level 2 lets you take one additional action on your turn. You can use that action for an option available to you, such as another Attack action or a spell with a casting time of one action. It does not grant a second bonus action, and it does not remove the action, target, or resource limits of another feature. The 2014 rules also have specific restrictions when you cast a spell as a bonus action, so check those before planning multiple spells on the same turn.
Compare common combinations
- Fighter/Barbarian: Both classes can support a Strength-focused martial character. Rage’s benefits require that you not wear heavy armor, and Rage prevents casting spells or concentrating on them while it lasts. Extra Attack does not stack between the classes, so consider whether more Barbarian levels or Fighter’s Action Surge and subclass features better fit the plan.
- Fighter/Rogue: Dexterity can support both classes. Rogue features can add skills and mobility, while Sneak Attack requires a finesse or ranged weapon and its own qualifying conditions. Sneak Attack is once per turn, not once per attack; extra Fighter attacks can create more chances to land a qualifying hit, but do not multiply the feature automatically.
- Fighter/Paladin: This combination can pair weapon attacks with Paladin features, but it requires Strength 13 and Charisma 13. Fighter levels delay Paladin progression, including access to higher-level Paladin spells and features. A spell slot does not by itself let a Paladin prepare a spell above the level their Paladin class permits.
- Fighter/Wizard or Fighter/Warlock: Spellcasting can add defensive or utility options, but check ability prerequisites, armor training, and action economy. For a Fighter/Eldritch Knight and Wizard combination, the 2014 multiclass spell-slot rules combine only the appropriate portions of each class. Spells known or prepared still depend on each class’s own level. Warlock Pact Magic uses its separate rules alongside the Spellcasting feature.
Choose a progression with a reason
Decide which class is the character’s main progression and which specific feature justifies the dip. Fighter 2 is the earliest point for Action Surge, but reaching it costs two levels in the other class. Fighter 3 adds a subclass; Fighter 5 brings Extra Attack. A later dip can keep your main class’s spells or subclass features on schedule, while an early dip may make sense if its proficiencies or first-level feature define the character.
Check your campaign’s level range as well. A split that looks powerful at level 15 may feel weak if the group is expected to stop at level 8. Write the character’s class levels at each upcoming total level and compare them with the features you would gain by staying single-classed.
Official Rules Sources
- Basic Rules (2014): multiclass prerequisites, proficiencies, Extra Attack, and spell slots
- Basic Rules (2014): Fighter features and class progression
A Fighter multiclass is most useful when its levels solve a clear character problem. Confirm the prerequisites, account for delayed class features, and use each multiclass rule to calculate exactly what your character can do.