Seat lab · Chamber of Deputies, 400 seats
Same votes,
another law.
Italy has changed its electoral law five times since 1993. The 2022 Parliament was elected under the Rosatellum; the next one will be elected under Legge 9 ottobre 2026, n. 180, in force since 24 October 2026. Rerun 2022 under either.
201 for a majority of 400
National stage only, as the law computes it before seats are placed in circoscrizioni (DPR 361/1957 art. 83). The Rosatellum option reproduces 2022's 245 list seats exactly. Single-member colleges and the eight seats abroad are kept as won in 2022.
Rosatellum · legge 165/2017 · used in 2018 and 2022
One mark,
two counts.
Three in eight seats were single-member colleges won by plurality; the rest went by list PR. There was one ballot and one vote.
- Mark a list
The vote counts for that list and for the coalition's candidate in the college.
- Mark only the candidate
The vote is spread over the lists backing them, in proportion to their votes in the college — 1.027.135 votes in 2022.
- Split your ticket and the ballot is void
Voting for one coalition's candidate and another's list (voto disgiunto) is not allowed.
- Thresholds
3% for a list, 10% for a coalition with at least one 3% list; lists under 1% do not count for their coalition. 10,8% of 2022's list votes went to lists that won no list seats.
2022 · Chamber · share of the vote → share of the seats
| Bloc | Votes | Colleges | List | Abroad | Seats |
|---|---|---|---|---|---|
| Centre-right | 43,8% | 121 | 114 | 2 | 237 59,3% |
| Centre-left | 26,1% | 12 | 68 | 4 | 84 21,0% |
| Movimento 5 Stelle | 15,4% | 10 | 41 | 1 | 52 13,0% |
| Azione – Italia Viva | 7,8% | 0 | 21 | 0 | 21 5,3% |
| Südtiroler Volkspartei – PATT | 0,4% | 2 | 1 | 0 | 3 0,8% |
| Sud chiama Nord | 0,8% | 1 | 0 | 0 | 1 0,3% |
| Vallée d'Aoste – Autonomie Progrès Fédéralisme | — | 1 | 0 | 0 | 1 0,3% |
| MAIE | — | 0 | 0 | 1 | 1 0,3% |
Votes: Italy, list votes after candidate-only votes are spread. Source: Interior Ministry open data, computed here.
Legge 9 ottobre 2026, n. 180 · “Stabilicum”
Proportional,
with a prize.
Passed by the Senate 113–71 on 15 September 2026 and by the Chamber 227–164 on 8 October 2026, after three confidence votes.
- No more single-member colleges
Except one in Valle d'Aosta and Trentino-Alto Adige's; every other seat is shared by list PR in multi-member colleges.
- Preferences return
Up to three preferences among a list's candidates; the head of the list is elected first and cannot be voted for by name.
- A bonus at 42%
The list or coalition first in both chambers with at least 42% in each gets 70 of the 400 deputies (35 of the 200 senators) on top of its proportional share — never more than 220 deputies and 113 senators. Otherwise all seats are proportional; there is no run-off.
- Same thresholds
3% and 10%, but the best list under 3% in each qualifying coalition still wins seats; each list names its candidate for Prime Minister.
Legge costituzionale 1/2020 · referendum 20 September 2020
945 became
600.
Voters approved cutting the Chamber from 630 to 400 and the elected Senate from 315 to 200 — 69,6% yes in Italy on 53,8% turnout. Each deputy now represents about 151,000 residents instead of 96,000.
Every referendum →