An open raise is the first voluntary raise in a hand, made when the pot is still unopened. In online poker games, this is one of your highest frequency decisions, and it quietly drives your win rate because it sets the price of entry, defines your range, and decides who gets to realize equity.
If you learn to open correctly, the rest of preflop gets easier. If you open poorly, you spend the entire hand trying to repair the damage with postflop heroics. We are not here for hope; we are here for clean EV.
What Counts as an Open Raise
An action is an open raise when nobody has raised before you. That means you are facing folds and maybe limps, but not a raise. You can open from any position, UTG through BTN and even from the SB when it folds to you.
What does not count as an open raise. If someone has already raised and you raise again, that is a 3-bet, not an open. If you call, you did not open. If you limp, you are choosing the lowest EV option in most online environments, especially once rake is considered.
Why We Open Raise Instead of Limping
Open raising wins money in three channels, and you want all three working for you at the same time.
- Fold equity preflop, you win the blinds immediately some percentage of the time.
- Initiative, you often get to make the first aggressive move postflop, which matters a lot in single raised pots.
- Equity realization, you deny opponents the chance to see flops cheaply with hands that play well against you.
Limping fails on all three. You give up fold equity, you invite multi way pots, and you allow the blinds to realize equity at a discounted price. Add online rake, and small pots that you split often become losing pots. Passive preflop lines get taxed.
Open Raising Has a Hierarchy, Position Comes First
When you ask what you should open, start with a simple hierarchy.
- Position, later positions open wider because fewer players are left to act and you will play more pots in position.
- Who is left to act, tight players behind you tighten your life less, aggressive 3-bettors behind you force you to tighten and choose hands that respond well.
- Table conditions, stack sizes, rake, and how the blinds defend will change your thresholds.
Context dictates strategy. A BTN open is not the same thing as an UTG open, even if the hand is identical. The hand does not change, your situation does.
What Your Open Raise Range Is, Conceptually
Your opening range is the set of hands you choose to open raise from a given position. Think of it as a portfolio. You are buying hands that do well when called, and that also perform well when facing a 3-bet.
In early position, your range leans toward hands with strong raw equity and robust playability, like AQ+, KQs, TT+. In late position, you add hands that gain EV mainly from position and fold equity, like suited connectors, suited gappers, and more offsuit broadways.
This is not about being fancy. It is about keeping your overall opening strategy profitable against the two most common outcomes in online cash games, the blinds fold, or you get called by the blinds.
Open Raise Sizing, Small Is Usually Smart Online
In most online sites, smaller opens tend to perform well because they keep your risk lower while still applying meaningful pressure to the blinds. Typical sizing is 2x to 2.5x from most positions. From the SB, many players go a bit larger because you will be out of position postflop and you want to discourage the BB from realizing equity too easily.
Do not treat sizing like a magic trick. A better mental model is simple. Your open size trades off risk versus fold equity. If the pool folds too much, you can open small and print. If the pool calls too wide, you should still open, but you want hands that dominate their calling range and you may consider slight size adjustments based on how sticky the blinds are.
Relative Hand Strength and Playability
Relative strength is everything. A hand can look good in a vacuum and still be a bad open if it performs poorly against the ranges that continue.
Example. KJo on the BTN can be fine because you often play heads up in position, and you win by c-betting and value betting. That same hand UTG is a leak because too many players can wake up with hands that dominate you, and even when you make a pair you face tougher ranges.
Hands that make strong top pairs and hands that make disguised strong draws are your bread and butter. Hands that make weak pairs and dominated top pairs are the troublemakers, and you need to control how often they appear in your early position opens.
Rake Matters, but It Is Not Your Only Variable
Online rake punishes small edges, especially in multi way pots and limp pots. This pushes you toward open raising and away from limping, and it also means your marginal opens from early position should be more disciplined.
That said, do not blame rake for everything. Position, opponent tendencies, and stack depth often matter more. Rake is a tax, not a strategy. Your job is to build a plan that wins even after the tax.
Common Mistakes Students Make with Open Raises
- Opening too loose from early position, you end up dominated and forced into low EV bluff catching later.
- Opening too tight on the BTN, you miss the most profitable seat in poker.
- Auto opening without tracking who is left to act, one aggressive 3-bettor on your left should change your entire range composition.
- Overlimping and set mining, you pay rake, you invite squeezes, and you rely on rare events to justify a bad preflop decision.
- Using random sizes, your range gets harder to execute and you create unnecessary variance.
Hand Scenario: Button Pressure Pays
Online 6 max cash, 100bb effective. It folds to Hero on the BTN with K♠ Q♠. SB folds, BB is a fairly standard defender.
Hero makes an open raise to 2.2bb. BB calls. Flop comes Q♥ 7♣ 2♦.
BB checks. Hero c-bets 33 percent pot. BB calls. Turn is 3♠. BB checks. Hero bets 60 percent pot for value and protection. BB folds.
This is the open raise doing its job. You opened a hand that plays well in position, you retained initiative, and you used sizing that keeps dominated queens in while charging random backdoor equity. You did not limp and hope to hit. You took control of the pot from the first decision.
Key Takeaway
An open raise is the first raise when the pot is unopened, and it is your primary way to generate EV preflop. Build position based opening ranges, use consistent small sizes that work well online, and always account for who is left to act. Raise hands that realize equity well when called, and stop donating EV through limps and passive set mining.
