What Happens After the Viva or Thesis Defense?

The deliberation: what happens while you wait

You leave the room. The examiners stay behind. In the UK this pause is typically 10 to 20 minutes; in the US, committee deliberation after the closed session usually runs about 15 minutes. There is no reliable way to read the duration — a longer wait does not mean they are arguing about whether to pass you.

When you are called back in, the lead examiner (or in the US, your committee chair) delivers the outcome verbally. In the UK, this is the examiners' recommendation to the institution — formal written confirmation follows later, along with the list of any corrections required. In the US, the committee chair typically signs the approval form on the day if the defense is passed.

Most candidates describe the moment of being called back in as the most stressful part of the entire process. That is reasonable. It passes quickly.

The possible outcomes and how common each is

UK regulations specify a defined set of outcome categories, though the exact wording varies by institution. A study of 26,076 PhD candidates from 14 UK universities (covering vivas from 2006 to 2017) found the following distribution:

• Pass with no corrections: awarded to roughly 5% of candidates. The thesis is accepted as submitted. This outcome is genuinely rare and should not be used as a benchmark.
• Pass with minor corrections: the most common outcome, received by approximately 79% of candidates in the UK study. The thesis is provisionally accepted; the candidate must address a defined list of corrections — typically typographical errors, clarifications, and localised additions — within a set period (usually three months, though timelines vary by institution).
• Pass with major corrections (sometimes called 'major revisions'): approximately 16% of UK candidates in the same dataset. The thesis passes in principle but requires more substantive work — new analysis, restructured chapters, or extended sections. Candidates normally have six months to complete major corrections, though again this varies. The degree is not conferred until the corrections are approved by the supervisor or examiner.
• Referral or resubmission: the thesis is not yet at doctoral standard but the candidate may substantially revise and resubmit, usually within 12 to 18 months. A further oral examination may or may not be required. This outcome is uncommon.
• Award of MPhil rather than PhD: the examiners judge that the work meets the standard for a Master of Philosophy but not a doctorate. Very rare. Among the roughly 4% of candidates who did not receive a PhD in the UK study, the large majority were offered an MPhil.
• Fail with no award: the rarest outcome. Represented around 3% of the unsuccessful candidates in the UK study — which itself was around 4% of the total — making outright failure without any award uncommon to the point of statistical rarity at the viva stage.

US dissertation defenses use different language — 'pass', 'pass with revisions', and occasionally 'fail' or 'defer' — and there is no equivalent large-scale dataset. The structural logic is the same: most candidates who reach the defense pass with some revisions required, and outright failure is uncommon.

What corrections actually involve

Minor corrections are exactly that. The examiners provide a written list — usually one to three pages — identifying sections that need attention. Common items: typographical errors, references that need completing, a paragraph where the argument is unclear, a table that needs a caption, a claim that needs a citation. Most candidates complete minor corrections in two to four weeks, well inside the three-month maximum typical in UK regulations.

Major corrections involve more substantive work. A chapter may need restructuring. A gap in the literature review may need filling. Additional analysis may be required to support a claim the examiners found insufficiently evidenced. The corrections list will be specific; the work required is real. Candidates generally have six months. Some finish in six weeks; others use most of the time.

In both cases, completed corrections are reviewed by one or both examiners (depending on institutional rules and the nature of the corrections). The supervisor signs off that the corrections are complete, or the examiner checks them directly. Once approved, the candidate receives formal notification and can proceed to final submission.

For a detailed breakdown of what examiners include on correction lists, typical workloads, and how to approach the revision process, see the dedicated corrections guide linked below.

From corrections approval to 'Dr': the administrative steps

Once your corrections are signed off, you submit the final thesis — the hardbound copy, the institutional repository deposit, or both, depending on your university's requirements. In the UK this submission triggers the formal award process. The research degrees committee (or equivalent) confirms the award, and the degree is entered on your record.

Formal conferral is not always immediate. Many UK universities confer research degrees at specific points in the academic calendar, tied to Senate or Council meetings. The gap between corrections approval and formal conferral can be a few weeks to a couple of months. You can usually request a letter confirming your degree has been recommended for award in the meantime — useful if you need evidence for a job offer or a post-doctoral position.

Graduation ceremonies — where you collect the physical award — are a separate step again. Most UK universities hold ceremonies twice a year; you do not have to attend at the first available date. The degree is conferred regardless of whether you attend a ceremony.

In the US, the timeline is governed by semester deadlines. Your institution sets a date by which the approved dissertation must be submitted to the graduate school for conferral in a given term. Miss that date and conferral shifts to the following term. If you defend in late spring and corrections take a few weeks, you may graduate in August or the following December depending on your program's calendar. Confirm the deadlines with your graduate school before you defend.

Corrections are the norm, not the exception

Nearly all candidates leave the room with something to fix. That figure — roughly 95% of passed UK candidates receiving either minor or major corrections — is worth sitting with. The viva is not a test with a clean pass or fail; it is a professional examination that almost always concludes with a working list of improvements. This is by design.

The purpose of the corrections process is to ensure the thesis that goes into the institutional repository and the British Library is the best version of the work. Examiners are not penalising you by finding things to correct. They are doing the job.

Major corrections, in particular, carry a stigma they do not deserve. Sixteen percent of candidates receive them. That is one in six. Many go on to publish from those corrected chapters. The corrections period — with its defined task and finite deadline — can be considerably easier to manage than the open-ended years of the PhD itself.

There is a real difficulty in the immediate aftermath: you have spent years on this thesis, the examination is over, and you are not yet 'done'. That gap — between the viva and formal conferral — is real and sometimes takes longer than expected to process. Knowing that most people experience it does not make it smaller. But it is finite, and it ends.