Weighted voting: use cases and best practices

What is weighted voting?

Weighted voting means assigning each voter a number of votes or a weight determined in advance. As a result, not all participants have the same influence on the final outcome.

This mechanism is used when a voter:

• represents several people;
• owns more units in a condominium;
• holds a larger share of capital;
• benefits from voting rights defined by bylaws or regulations.

In practical terms, each person votes only once, but their ballot is counted according to the weight assigned to them.

Who uses weighted voting?

Weighted voting meets common needs in organizations where participants do not all have the same level of representation or the same rights.

Associations and federations

In some associations or federations, a representative may vote on behalf of several members, clubs, or local bodies. Their vote is then weighted according to the number of members they represent.

This is especially common in multi-level organizations, for example local, regional, and national structures.

Condominium associations

In a condominium association, co-owners’ voting rights are generally calculated according to the ownership shares or unit fractions attached to the lots they own. All co-owners take part in the vote, but their voting weight is not the same.

Companies and shareholder meetings

In a company, voting rights may depend on the number of shares or equity interests held. A partner or shareholder with a larger participation may therefore carry more weight in the final result.

A simple example of weighted voting

Take a vote in which:

• 2 voters each have a weight of 10;
• 8 voters each have a weight of 1.

If the 2 voters with a weight of 10 vote “yes” and the other 8 vote “no,” the result is:

• Yes: 20 votes
• No: 8 votes

“Yes” therefore wins, even though fewer people chose it. What matters here is not the number of voters, but the total weight of the votes cast.

Weighted voting, proxy voting, plural voting: what is the difference?

The terminology varies depending on the context.

In associations, people often speak of proxy voting when a participant directly represents other members. In that case, the logic is based on the number of proxies or delegated votes.

The term weighted voting is broader. It applies both when the weights correspond to proxies and when they reflect shares, unit fractions, or any other allocation key.

In politics, the term plural voting is sometimes used. In the corporate context, people may also refer to multiple voting rights, depending on the situation.

How do you set up weighted voting on an online voting platform?

Compared with a standard vote, one additional piece of data is required: each voter’s weight.

In practice, this usually involves importing a voter file containing a column that specifies each participant’s weight or number of votes.

The platform must then use this data when counting the votes.

Whole-number or decimal weights

Depending on the use case, weights may be whole numbers or decimals.

In condominium associations, for example, voting rights are often expressed as decimals. If a voting platform only supports whole-number weights, it may be necessary to multiply all weights by a common factor, such as 1,000 or 10,000, in order to convert them into integers.

Direct weighting or tiered weighting

When a voter represents members, the weight can be defined in two ways:

• direct weighting: 1 member = 1 vote;
• tiered weighting: the number of votes depends on thresholds defined in the bylaws.

Example: a club may have 2 votes for every 10 members up to 50 members, then 1 additional vote for every 10 members beyond that point.

How can confidentiality be preserved in weighted voting?

This is a key issue.

If a ballot remains visible with its own specific weight, it may be possible to identify who cast it. For example, if only one voter has a weight of 12 and only one ballot carries that weight, it becomes possible to link that ballot to that person.

To preserve ballot secrecy, the weight should not be directly attached to an individual ballot.

One solution is to convert the weight into several equivalent unit ballots. In the previous example, a voter with a weight of 12 would be counted as 12 ballots with a weight of 1. The ballots can then no longer be distinguished by their weight.

For an online voting platform, this issue is central. Weighted voting must not weaken the confidentiality guarantees provided by the platform.

Weighted voting and cumulative voting: do not confuse them

Weighted voting should not be confused with cumulative voting.

In standard weighted voting, the voter expresses one choice, and that choice is simply assigned a certain weight.

In cumulative voting, the voter has a pool of votes that they can distribute among several candidates or options.

Example: a voter holding 10 proxies has 20 votes to elect 2 positions from among 3 candidates. They may:

• assign 10 votes to two candidates;
• or distribute their votes, for example by assigning 10 votes to one candidate and 5 votes to each of the other two.

When the number of votes that can be assigned to the same candidate is limited by the number of proxies, this is called capped cumulative voting. Otherwise, it is uncapped cumulative voting.

Key points to check before organizing a weighted vote

Before launching a vote, several points should be verified:

• the weighting rule provided for in the bylaws, internal rules, or applicable legal texts;
• the accuracy of the weights assigned to each voter;
• the correct integration of these weights into the voter file;
• whether cumulative voting must be allowed;
• the confidentiality safeguards.

A poorly configured weighted vote can undermine the validity of the process. A specialized platform helps reduce that risk.

Conclusion

Weighted voting is used in many types of organizations, including associations, condominium associations, federations, and companies. It makes it possible to comply with governance rules under which not all voters have the same weight.

But this type of voting requires rigor. Voting rights must be managed correctly, vote counting must be reliable, and ballot secrecy must be preserved.

A suitable online voting platform can simplify the process, prevent calculation errors, and provide a safer framework for weighted voting.