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The Hiring Calendar Nobody Publishes: Seasonal Demand for Skilled Migrant Roles in the UK and Ireland

Every sector has a demand calendar. Every visa route has a permission calendar. Employers who plan to the first and forget the second lose the season. Here is how the two fit together in 2026 for construction, engineering and agriculture.

Skilled migration into the UK and Ireland runs on two calendars. The sector sets one: daylight, weather, plant shutdowns, harvests and budget cycles. The state sets the other: sponsor licences, certificates of sponsorship, employment permits and entry visas, each with its own queue. They line up only when someone works backwards from the date the worker is needed on site.

The permission calendar first

In the UK, a new sponsor licence takes around eight weeks and a Skilled Worker visa decision runs three to eight weeks depending on the season. An employer that already holds a licence can go from offer to start in six to eight weeks; a first time sponsor should plan on three to six months (Tarve, 2026).

In Ireland, a standard employment permit takes four to eight weeks, or two to four for a Trusted Partner. Visa required nationals then wait a further four to eight weeks for an entry visa. Decision to worker on site is typically four to six months (Recruitroo, 2026).

A vacancy that must be filled in April cannot be opened in March.

Construction and trades

Construction demand follows daylight. Groundworks, roofing, bricklaying and external finishes run hardest from March to October and stall in the dark months. Budgets and tender awards are settled in the first quarter, which is when contractors discover how many people they are short.

To have overseas trades on site for a spring start, UK paperwork needs to be moving by December. For Ireland, where an entry visa follows the permit, November is safer for visa required nationals.

The rules moved this year. In the UK, most trades sit below the graduate skill threshold and can only be sponsored through the Temporary Shortage List, which expires on 31 December 2026 and does not allow new entrants to bring dependants (DavidsonMorris, 2026). On 24 July 2026 the Migration Advisory Committee recommended 28 occupations for a further 18 months of access from January 2027, among them bricklayers, roofers, plumbers, carpenters and joiners, plasterers, wall tilers and construction supervisors. That recommendation takes effect only if the Government accepts it (Electronic Immigration Network, July 2026). Employers relying on a Temporary Shortage List role should have certificates assigned and applications lodged before the year end.

Ireland widened access. Regulations in force from 22 May 2026 opened General Employment Permits to steel fixers, concrete pump operators, curtain wallers and fencing erectors, and added construction planners to the Critical Skills list, with a General Employment Permit salary floor of €36,605 (Lewis Silkin, May 2026). Construction took 1,246 permits in the first half of 2026 (Department of Enterprise, Tourism and Employment, reported by IrishTalents, July 2026).

Engineering and manufacturing

Manufacturing runs to a different clock. Planned shutdowns cluster in late summer and over Christmas, and the fitters, welders, pipe fitters and electrical technicians who cover them are booked a full quarter ahead. Capital projects are signed off in the first quarter and start in the autumn, so there are two hiring pushes a year with a quieter stretch between.

Demand is recovering rather than falling. Mechanical engineering vacancy postings dropped from 231,000 in 2023 to 110,000 in 2025 and are forecast to climb back toward 160,000 within twelve months (Lightcast, reported by Enginuity, June 2026). Competition for the same permits will rise with it.

In the UK, welding trades, engineering technicians, metal working fitters, sheet metal workers, pipe fitters and electricians all sit within the 28 recommended occupations, so the same December deadline applies. Roles that clear the graduate threshold use the main Skilled Worker route, where the salary floor is £41,700, English must be proven at B2 since 8 January 2026, and the Immigration Skills Charge rose by 32 per cent in December 2025 (Centuro Global, 2026). Those costs are fixed; the timing is not.

In Ireland, the May 2026 changes renewed a quota of 1,000 permits for motor mechanics (Lewis Silkin, May 2026). Trusted Partner status turns a permit round in two to four weeks, which is the single most useful lever for shutdown cover.

Farming and agriculture

Agriculture is the most seasonal of the three and the most tightly rationed. The UK Seasonal Worker visa is capped at 41,000 places for horticulture and 1,900 for poultry in 2026, each worker limited to six months in any ten month period, and the scheme has been extended for a further five years (Defra, reported by NFU, May 2026). Horticulture runs from April to October; poultry recruitment concentrates in the autumn ahead of Christmas. Scheme operators recruit in the winter for spring arrivals.

No agricultural occupation sits on the UK Temporary Shortage List, so permanent farm roles such as herd managers must clear the graduate threshold on the main Skilled Worker route (DavidsonMorris, 2026).

Ireland's own data shows the season plainly. The agriculture, forestry and fishing sector received 1,343 employment permits in the first half of 2026, up 26 per cent on the same period in 2025: 173 in January, 136 in February, 135 in March, then 328 in April, 343 in May and 228 in June (Department of Enterprise, Tourism and Employment, reported by Agriland, July 2026). Most went to meat processing, mushroom growers and dairy farms. A separate horticulture seasonal permit allowing up to seven months of work has completed its first pilot, and a second phase is recommended for the 2027 growing season (Irish Examiner, June 2026).

For employers

Work backwards from the date you need people on site, and treat the quiet quarter as the filing quarter. In the UK, lodge any Temporary Shortage List application before 31 December 2026 rather than assume the successor list will be in place on 1 January. In Ireland, apply for Trusted Partner status now if you expect to hire more than once. Salary and English requirements are known in advance; the only variable you control is when you start.

For candidates

Apply against the calendar, not the job board. Construction applications made in the autumn land for spring starts. Shutdown cover is arranged in the first quarter for the summer and in early autumn for Christmas. Seasonal agricultural work is placed in the winter for the spring. Hold your B2 English certificate before you apply for a UK role, and understand that a Temporary Shortage List visa will not bring your family with you. In Ireland, a complete application matters more than a fast one: a returned form resets the clock by three to four weeks.

CAS Recruitment Group places skilled workers with construction, engineering and agri food employers across the UK and Ireland, and manages the permit and visa stages alongside the placement. Timing is most of the work.

Employers: when do you open your overseas hiring for the season, and has that date moved this year? Candidates: which month have you found gives you the best chance of an offer? Add your view below, or send a message for a quieter conversation.

Sources

Tarve, How long does UK visa sponsorship take, 2026

Recruitroo, Ireland work permit processing times 2026

DavidsonMorris, Temporary Shortage List guide, 2026

Electronic Immigration Network, MAC recommends 28 occupations for Temporary Shortage List, 24 July 2026

Lewis Silkin, Ireland's employment permit occupations lists: what's changed in May 2026, 27 May 2026

Department of Enterprise, Tourism and Employment, employment permit statistics 2026, reported by IrishTalents (June 2026 insight) and Agriland (July 2026)

Centuro Global, UK immigration 2026 changes

Enginuity, Skills Insight June 2026 (Lightcast data)

NFU, Seasonal Worker Scheme information page, updated 21 May 2026 (Defra allocations)

Irish Examiner, Department recommends second pilot phase of horticulture seasonal worker permit, June 2026