IB retake score improvement: what one or two higher grades actually change

First identify the outcome, then calculate the gap

Write down six subject grades, their levels, your TOK and EE outcome, CAS completion and the exact wording of any university offer. Distinguish three goals: obtaining the Diploma, increasing the total, and meeting a named subject requirement. They can require different retake choices.

The examples use three HL and three SL subjects. All assessments have grades, the core outcome is valid and CAS is complete except in example 6. Other award and registration requirements must also be satisfied; a table is not an official award decision. If you have four HL subjects, the three highest HL grades count towards the HL minimum; with two SL subjects the SL minimum is five points.

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1. Moving from 23 to 24 points

The original HL subtotal is already 12 and the SL subtotal is 10. The only numerical shortfall is the overall total: 12 + 10 + 1 = 23. Raising the first HL subject from 4 to 5 produces 24. Under the stated assumptions, the numerical award conditions are now met. This does not mean that a one-grade increase is easy or guaranteed; compare component evidence and realistic preparation needs before choosing the subject.

2. A higher total does not replace the HL minimum

This candidate has 27 points but only 11 at HL. Raising an SL grade would increase the total without fixing that problem. Instead, the HL grade of 3 rises to 4: HL becomes 12 and the total becomes 28. The useful improvement is the one that changes the failed condition. Keep a separate HL subtotal in your plan so a reassuring overall score does not hide the actual obstacle.

3. Fixing an SL shortfall

The initial total is 27, but the three SL grades add to only 8. Changing the SL grade of 2 to 3 raises that subtotal to 9 and the total to 28. The three resulting SL grades of 3 do not exceed the limit of three grades of 3 or below. Raising an already strong HL subject would not solve the SL shortfall. Recheck all low-grade conditions after every proposed change.

4. Two improvements meet a two-part offer

Assume a fictional offer requires 35 points including Chemistry HL 6, and admissions has agreed to consider this retake session. Chemistry is the second HL grade, initially 5. Raising it to 6 and the final SL grade from 4 to 5 moves the total from 33 to 35 and satisfies the stated subject condition. This is arithmetic, not a real university policy. The result deadline, transcript and any additional offer conditions still matter.

5. The same two points, but the wrong subjects

Use the same fictional offer and original results as example 4. Here two SL subjects rise by one grade each. The total reaches 35, but Chemistry HL remains 5, so the stated Chemistry condition is still unmet. The equal points gain hides an unequal admissions outcome. Before adding a second retake, ask whether it addresses a separate requirement or merely improves a total that is no longer the limiting factor.

6. More points cannot complete CAS

This candidate starts with 31 points and reaches 32 after one HL grade improves. However, CAS is incomplete. An extra exam point does not complete CAS and cannot remove that separate obstacle to the Diploma award. Contact the responsible school about the missing requirement before paying for another exam. The same principle applies to missing assessment outcomes or an invalid TOK/EE outcome: diagnose the particular condition rather than relying on the total.

Subject grades are not raw exam marks

A change from grade 5 to grade 6 adds one Diploma point. It does not mean one more raw mark in an exam. Subject grades follow the aggregation of weighted assessment components and the applicable grade boundaries. Ask your coordinator for the scaled total and component information before deciding where improvement is feasible.

For a purely illustrative component weighted at 20%, moving from 50% to 70% on that component adds 4 percentage points to the weighted subject total: (70 − 50) × 0.20 = 4. It does not add four Diploma points or guarantee a higher subject grade. Real component weighting, scaling and rounding depend on the subject and assessment model.

Previous boundaries describe a previous assessment session. They can guide a diagnostic exercise but cannot establish next session's boundary or the probability of your improvement. A general IB pass rate is not a retaker success rate. We do not have a verified dataset showing how often students with these exact starting results achieve the proposed gains.

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Turn the calculation into a retake decision

Make a short plan for each candidate subject: the required outcome, evidence from recent timed work, preparation available, syllabus compatibility and a willing host school. Do not choose only by the number of points on offer. A low grade with a major coursework problem may be less straightforward than an exam weakness you can identify and address.

If an offer is involved, get written confirmation about retake acceptance, the named subject and level, and the final date for results. IBretake helps search for an exam host; it does not decide Diploma awards or university admission and does not provide new IA or coursework supervision.

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• Calculate both the total and the HL/SL subtotals.
• Check the low-grade, core and CAS conditions separately.
• Identify the smallest subject set that would meet the actual goal.
• Check the syllabus and any existing coursework before registration.
• Confirm the session, school cutoff and university results deadline.