Edexcel Combined Science Grade Boundaries Explained
GCSE combined science Edexcel grade boundaries explained using 2025 marks, double grades, tiers and practical advice for GCSE results day 2026.
Results day has a strange way of making six science papers feel like one unanswered question. The reassuring part is that GCSE Combined Science Edexcel grade boundaries follow a clear system: Pearson adds your marks from all six papers, then compares the total with the boundary for your tier.
For the June 2026 series, GCSE results will be released to candidates on Thursday 20 August 2026. The final 2026 boundaries will not be known until results are released, so the latest confirmed comparison is June 2025. This guide explains those official boundaries without treating them as a prediction.
Edexcel Combined Science results day checklist
Before worrying about individual papers, remember five things:
- Edexcel Combined Science has qualification code 1SC0.
- You sit six papers: two Biology, two Chemistry and two Physics.
- Each paper is worth 606060 marks, giving 360360360 marks altogether.
- Your result is one double grade worth two GCSEs.
- The grade is based on your total mark, not separate Biology, Chemistry and Physics grades.
You can review the course structure through the Edexcel GCSE Combined Science revision hub and check the latest published figures on MathsGenie's Edexcel GCSE grade boundaries page.
A student opens a results envelope while Biology, Chemistry and Physics squeeze through one combined doorway
How Edexcel Combined Science grades are calculated
Pearson's specification confirms that the six papers are equally weighted. The structure is:
6×60=3606 \times 60 = 3606×60=360All six raw marks are added together. One stronger science can therefore compensate for a weaker performance elsewhere. Individual papers are not awarded official GCSE grades.
Combined Science is a double award, so results appear as equal or adjacent grades. Possible outcomes run from 9-99\text{-}99-9 down to 1-11\text{-}11-1, creating 171717 grade combinations. A result such as 7-67\text{-}67-6 is possible; 7-57\text{-}57-5 is not.
Foundation tier normally provides access from 1-11\text{-}11-1 to 5-55\text{-}55-5. Higher tier provides access from 4-44\text{-}44-4 to 9-99\text{-}99-9, with 4-34\text{-}34-3 available as a safety-net grade when a candidate falls a small number of marks below the 4-44\text{-}44-4 boundary.
Edexcel Combined Science grade boundaries for 2025
The following are Pearson's official June 2025 overall boundaries for specification 1SC0. Each figure is the minimum total required out of 360360360. They are useful context for GCSE Combined Science results day, but they do not determine 2026 grades.
| Double grade | Foundation minimum | Higher minimum |
|---|---|---|
| 9-99\text{-}99-9 | Not available | 284284284 |
| 9-89\text{-}89-8 | Not available | 269269269 |
| 8-88\text{-}88-8 | Not available | 255255255 |
| 8-78\text{-}78-7 | Not available | 241241241 |
| 7-77\text{-}77-7 | Not available | 227227227 |
| 7-67\text{-}67-6 | Not available | 207207207 |
| 6-66\text{-}66-6 | Not available | 187187187 |
| 6-56\text{-}56-5 | Not available | 167167167 |
| 5-55\text{-}55-5 | 215215215 | 147147147 |
| 5-45\text{-}45-4 | 194194194 | 127127127 |
| 4-44\text{-}44-4 | 174174174 | 107107107 |
| 4-34\text{-}34-3 | 151151151 | 979797 |
| 3-33\text{-}33-3 | 128128128 | Not available |
| 3-23\text{-}23-2 | 105105105 | Not available |
| 2-22\text{-}22-2 | 828282 | Not available |
| 2-12\text{-}12-1 | 595959 | Not available |
| 1-11\text{-}11-1 | 373737 | Not available |
The two tiers have different papers and therefore different boundaries. A lower numerical boundary on Higher does not mean that Higher was easier: its questions assess more demanding content and skills.
Why grade boundaries change
Grade boundaries are not fixed targets chosen before students sit the examination. Awarding organisations set them after marking, using evidence about the difficulty of the papers and student performance. Their purpose is to keep the standard represented by a grade reasonably consistent when paper difficulty changes.
That is why a boundary from 2025 can guide revision but cannot guarantee a 2026 result. A sensible target includes some breathing room rather than aiming for the exact previous boundary.
A student consults last year's grade-boundary crystal ball while a friend points towards results day
What your result means on results day
Your results slip should show the overall double grade. It does not mean the first number belongs to Biology and the second to Chemistry or Physics. Both numbers describe your combined achievement across the entire qualification.
Entry requirements vary between sixth forms, colleges and courses. Check the exact wording of your offer rather than assuming that every provider interprets double grades identically. If your result is unexpected or close to an important requirement, speak to your school's examinations officer or a teacher before making decisions about a review of marking.
Using boundaries to improve revision
Grade boundaries are most useful when they lead to action. Complete Edexcel Combined Science past papers, mark them carefully and record your total across a complete set of six papers. Compare trends across several attempts rather than trusting one unusually strong or weak paper.
Then repair specific gaps with the Edexcel Combined Science revision guides. Maths skills matter here too. Graphs, proportional reasoning, rearranging formulae and units can protect marks across science and GCSE maths. Useful starting points include motion graphs and vectors and circuits, current and potential difference.
Balance calculations with knowledge retrieval. The periodic table revision guide and plant transport and transpiration guide are useful examples of board-specific revision rather than generic science notes.
Common mistakes when reading the boundaries
- Treating an old boundary as a forecast. The 2025 table is confirmed history, not a promised 2026 threshold.
- Using a single-paper boundary as an official grade. Pearson awards the qualification from the 360360360-mark total.
- Mixing Foundation and Higher figures. Always check the tier shown on your entry and papers.
- Reading the two grades as separate sciences. They form one combined double award.
- Comparing raw marks with AQA or OCR. Exam boards have different papers, specifications and maximum marks.
- Rounding estimated marks too confidently. Teacher estimates are useful for revision, but only marked scripts produce the final total.
Turn the boundary into a plan
A grade boundary is a line drawn after the examination. Your revision plan is what you can control before it.
Use MathsGenie's free Edexcel Combined Science resources to move from reading to retrieval, then to timed practice. Begin with the revision guides, complete practice questions and mini tests, and finish with past or predicted papers. Mark schemes show where credit is earned; worked and video solutions help turn missed marks into a method you can repeat.
Start at the MathsGenie Edexcel GCSE Combined Science revision hub, choose one weak topic, and make your next revision session measurable.
