The guard captain isn’t in the 2014 SRD 5.1; this is its stat block from the SRD 5.2. For the 2014 version of its kin, see the Guard.
How many guard captains for a fight?
A guard captain is worth 1,100 XP. Using the 2024 encounter budgets (SRD 5.2), this is how many guard captains fit each difficulty for a party of four characters of the same level. A dash means even one would be over the budget.
Party level
Low
Moderate
High
3rd
—
—
1
4th
—
1
1
5th
1
2
4
6th
2
3
5
7th
2
4
6
8th
3
6
7
9th
4
7
9
10th
5
8
11
11th
6
10
12+
12th
8
12+
12+
13th
9
12+
12+
14th
10
12+
12+
15th
12
12+
12+
Budgets add up every monster’s XP, so you can swap some for other creatures of the same total. Try other party sizes and mixes in the encounter calculator.
How the guard captain compares at CR 4
Against the 15 other challenge 4 monsters in the SRD 5.1, the guard captain has more hit points than 2 of them, which makes it one of the frailest at its CR. See every CR 4 monster.