H-1B Lottery Odds & Multiple Registration Strategy Tool

Estimate selection odds with the cap structure and rule set you actually care about

The H-1B registration season creates a practical planning question: given the number of registrations in the system, how likely is one beneficiary to be selected? This calculator estimates single-beneficiary odds under the general cap, adds the extra advanced-degree chance when relevant, and changes the model by season. FY 2025 and FY 2026 use beneficiary-centric random selection. FY 2027 and later use a wage-level-weighted educational model.

That distinction matters. Multiple employers for the same beneficiary do not multiply odds in the beneficiary-centric model. In the FY 2027+ weighted model, if same-beneficiary registrations list different equivalent wage levels, this page uses the lowest equivalent wage level for weighting.

The output is still an estimate, not a promise. USCIS selection mechanics, later rounds, denied petitions, duplicate screening, and other real-world factors can shift the exact outcome in a way no short calculator can perfectly predict. But a good estimate is still extremely useful. It lets you compare one season with another, explain why a master's registration generally has better odds than a non-master's registration, and see why extra employers used to matter more than they do under the newer beneficiary-based approach. Used that way, the calculator becomes a compact planning aid for beneficiaries, employers, recruiters, and anyone trying to interpret lottery headlines without building a spreadsheet from scratch.

What each input means in plain language

Total General-Cap Registrations is the broadest pool in the model. Enter the total number of eligible registrations competing for the regular 65,000 cap slots in the filing season you want to examine. Advanced-degree registrations belong inside this total because they are first considered in the general draw before any remaining advanced-degree registrants move to the extra 20,000 master's-cap draw. If you are using USCIS season data, this input is the big headline number most articles cite.

Total Advanced-Degree Registrations (subset of general) is the smaller group of registrations that qualify for the advanced-degree exemption. This number must logically be less than or equal to the general pool because it sits inside it. Think of this input as the part of the overall registration pool that gets a possible second chance. A higher master's pool can increase competition within that bonus round, while a lower master's pool means each remaining advanced-degree registration has a better shot at one of the 20,000 advanced-degree cap slots.

Number of Employers Filing for You is the strategy input. Under legacy modeling, the calculator treats those filings as multiple independent entries and uses a standard probability complement formula to estimate how much an additional filing could have raised the chance of being selected. Under FY 2025/FY 2026 beneficiary-centric modeling and FY 2027+ weighted modeling, that same input becomes a comparison device rather than a probability booster. You can still enter 2, 3, or 4 employers to illustrate the old effect, but the current-season result stays anchored to one beneficiary.

Do you qualify for the advanced-degree exemption? should be set to yes only when the beneficiary truly qualifies for the master's-cap treatment you want to model. In this calculator, turning the option on means the person participates in the general cap first and then, if not selected there, is estimated to receive one more chance in the advanced-degree cap. Turning it off means the estimate uses only the general-cap lottery.

Season is the policy switch. FY 2025 and FY 2026 use a beneficiary-centric random model. FY 2027+ uses equivalent wage level weighting, so higher wage levels receive higher modeled selection odds. This is still educational and must be checked against current USCIS instructions.

General Cap Slots and Advanced-Degree Cap Slots are the available selections in each draw. The defaults match the usual statutory structure of 65,000 general slots and 20,000 advanced-degree slots. In most cases you will leave those values alone, but the fields are editable so you can test hypothetical policy changes or special explanatory scenarios. The defaults are examples of a common real-world setup, not a recommendation and not a forecast.

If you are unsure which season's numbers to use, the cleanest approach is to run at least two scenarios: one with the latest official registration counts you can verify and one with a more conservative or more crowded pool. That gives you a useful range instead of a single percentage that looks more precise than it really is.

How the calculator turns those inputs into odds

The first step is the simplest one: estimate the general-cap single-entry probability by dividing the number of general cap slots by the total general registration pool. The calculator then clamps the result between 0 and 1 so a strange input combination cannot display an impossible probability greater than 100%.

Here, G is the total general registration pool and C_general is the number of regular cap slots. If you enter 343,981 general registrations and 65,000 general cap slots, the general-cap single-entry estimate is about 18.9%.

For a master's-cap-eligible beneficiary, the calculator then estimates how many advanced-degree registrations would be expected to clear the general draw first. It subtracts that expected number from the master's pool and uses the remainder as the pool competing for the advanced-degree cap. The combined advanced-degree single-entry probability is the chance of winning in the general draw plus the chance of missing the general draw and then winning in the advanced-degree draw.

In this expression, M is the advanced-degree registration pool and C_masters is the number of advanced-degree cap slots. This is still a simplification because the calculator uses an expected value for the number already selected in the general draw rather than a full draw-by-draw simulation. For planning purposes, though, it produces a clear and interpretable estimate.

The next step depends on the rule set. If you are modeling a legacy season in which multiple employer registrations could act like multiple independent chances, the calculator applies the complement formula below, where n is the number of employers and p is the single-entry probability.

Under beneficiary-centric and FY 2027+ models, the calculator deliberately does not apply a same-beneficiary multi-registration boost. The beneficiary's probability remains a single-beneficiary probability, with FY 2027+ adjusted by equivalent wage level.

If you prefer abstract notation, the same idea can be viewed more generally as a function of inputs and weighted components. The two MathML blocks below are preserved from the original page because they are still a useful way to describe the calculator's overall modeling pattern.

Those generic formulas are a reminder that the result is driven by a small number of interpretable variables: the size of the competing pool, the size of each cap, the candidate's degree status, the season, and for FY 2027+ the equivalent wage level.

Worked example using the default values

Suppose you leave the FY 2026 defaults in place: 343,981 total general-cap registrations, 150,000 advanced-degree registrations inside that total, 65,000 general cap slots, and 20,000 advanced-degree cap slots. Start with a non-master's candidate. The general-cap estimate is 65,000 divided by 343,981, which is about 18.9%. If only one employer files, that 18.9% is the current-season single-beneficiary estimate. If three employers could each file under the legacy model, the simplified multi-entry comparison would rise to roughly 46.7%, but the FY 2026 beneficiary-centric model stays at the single-beneficiary result.

Now look at a master's-cap-eligible beneficiary using the same pool sizes. The calculator first estimates the expected number of advanced-degree registrations selected in the general draw: 18.9% of 150,000, or about 28,344. That leaves roughly 121,656 master's registrations still competing for the 20,000 advanced-degree slots. The advanced-degree bonus-round chance is therefore about 16.4%, but it only applies to people who were not selected in the general draw. Once the calculator combines those two stages, the estimated master's single-entry selection probability is about 32.2%, depending on rounding.

That result is the key intuition many users want from the page. A master's-cap-eligible registration is not simply competing in a different pool from the start. It first competes in the same general lottery as everyone else and then, if not selected, may receive another chance in the advanced-degree round. That is why the advanced-degree estimate is higher than the regular-cap estimate without being the simple sum of 18.9% and 16.4%.

That table is not meant to encourage a filing strategy. It is meant to make the output easier to interpret. If you change only one input and the result moves in the direction you expect, the model is probably reflecting the policy logic correctly. If the result surprises you, check whether the master's pool is entered as a subset of the general pool and whether the rule toggle matches the season you actually want to analyze.

How to read the result without over-reading it

When you click Calculate Odds, the result panel produces a short plain-language summary. It always starts with the single-entry estimate because that is the foundation of every other scenario. If the advanced-degree exemption is on, the single-entry estimate represents the two-stage chance for a master's-eligible beneficiary. If it is off, the single-entry estimate is just the general-cap probability.

The next sentence tells you whether multiple employers change anything in the selected rule environment. In FY 2025, FY 2026, and FY 2027+ modes, the result should explicitly say that multiple employers do not raise the modeled current-season odds. That is a good sanity check. If you enter four employers and the current result still matches the single-beneficiary probability, the calculator is behaving as intended. The optional pre-2025 comparison can still show how the old independent-entry math would have behaved.

A useful way to work with the tool is to test one assumption at a time. First, keep the pool sizes fixed and switch between master's eligible and non-master's. Then keep the candidate type fixed and switch seasons. Finally, vary the total registration pools to see how sensitive the estimate is to a more crowded or less crowded year. This step-by-step approach is better than changing five inputs at once, because you can still explain why the result moved.

You should also perform a quick reality check on scale. If you raise the number of total general registrations while keeping cap sizes unchanged, the odds should fall. If you raise the cap sizes while keeping the pools unchanged, the odds should rise. If you increase the number of employers under legacy mode, the odds should go up but with diminishing returns, because each additional employer helps less than the previous one once the baseline probability is already substantial. Those direction checks catch most entry mistakes immediately.

Assumptions, edge cases, and limits of the model

This tool is intentionally compact, so it relies on a few simplifying assumptions. They are reasonable for fast scenario analysis, but they matter when you interpret the answer:

• The advanced-degree pool is assumed to be a subset of the general pool. If you enter a master's pool larger than the general pool, the numbers no longer represent the real lottery structure.
• Legacy multiple filings are modeled as independent chances. That is useful for historical comparison, but it is still an approximation rather than a reproduction of every procedural detail.
• The advanced-degree second round is estimated from expected remaining registrations. The calculator does not run a full probabilistic simulation of every draw order.
• The model does not predict later rounds, denial rates, or petition-stage outcomes. It estimates selection probability at the registration stage only.
• The result is educational and strategic, not legal advice. Filing compliance, beneficiary eligibility, and current USCIS rules should always be confirmed from authoritative sources.

Those caveats do not make the tool weak; they make it honest. A transparent estimate is often more useful than a more complicated black box. If you know which assumptions drive the answer, you can communicate the result clearly to a candidate, manager, or client and then decide whether you need deeper legal or statistical analysis. For everyday planning, that is usually exactly the right balance.

Source metadata: USCIS H-1B electronic registration data for FY 2025 and FY 2026 where available; FY 2027+ wage-level weighting is modeled educationally from the public rule description. Effective years: FY 2025, FY 2026, FY 2027+. Last updated on AgentCalc: May 13, 2026. Limitation: this is not legal advice and does not predict petition approval, later rounds, or agency discretion.

Below the calculator, you will also find a short optional mini-game that turns the rule difference into a visual challenge. It is purely educational and does not change the math above, but it gives you a fast intuition for why extra registrations once acted like extra shots and why the unique-beneficiary rules collapse them back into one.