Cost reporting and commercial control for JCT & NEC contracts
Coreloops gives you a live cost position on every job and tools to stick to your contract terms, so nothing lands on you at final account that you didn't see coming.
One system, not twenty spreadsheets.
"…clause 4.20 is amended by the deletion of the words 'provided that the total amount retained shall not exceed 2.5 per cent of the Contract Sum'."
| Cost code | Committed | Actual | Accrued | Forecast final cost | Margin |
|---|---|---|---|---|---|
| DEM01 Strip out & demolition | £96,000 | £92,400 | £0 | £96,000 | 14.2% |
| GRD02 Groundworks | £265,000 | £248,600 | £8,500 | £268,000 | 11.2% |
| FRM03 Frame & upper floors | £198,000 | £121,000 | £12,000 | £214,000 | 12.8% |
| ENV04 Roof & envelope | £232,000 | £96,500 | £10,000 | £286,000 | 9.4% |
| MEP05 Mechanical & electrical | £189,000 | £74,000 | £14,000 | £372,000 | 11.1% |
| FIN06 Internal finishes | £78,000 | £24,000 | £6,000 | £268,000 | 12.9% |
| EXT07 External works | £42,000 | £18,000 | £3,000 | £168,000 | 9.7% |
| PRE08 Preliminaries | £132,000 | £98,000 | £5,000 | £336,000 | -5.9% |
| PLT09 Plant & temp works | £64,000 | £32,500 | £2,000 | £143,000 | 8.1% |
| STF10 Site staff | £48,000 | £7,000 | £1,000 | £138,000 | 10.4% |
| Project | £1,344,000 | £812,000 | £61,500 | £2,289,000 | 10.8% |
Trusted by UK contractors
Real-time cost reporting
Committed, actual, accrued, forecast final cost and margin, moving as invoices, purchase orders, timesheets and accruals land.
| Cost code | Description | Committed | Actual | Accrued | Forecast final cost | Margin | Applied vs certified |
|---|---|---|---|---|---|---|---|
| DEM01 | Strip out & demolition | £96,000 | £92,400 | £0 | £96,000 | 14.2% | £0 |
| GRD02 | Groundworks & substructure | £265,000 | £248,600 | £8,500 | £268,000 | 11.2% | £0 |
| FRM03 | Frame & upper floors | £198,000 | £121,000 | £12,000 | £214,000 | 12.8% | -£4,200 |
| ENV04 | Roof & external envelope | £232,000 | £96,500 | £10,000 | £286,000 | 9.4% | 3 periods-£18,400 |
| MEP05 | Mechanical & electrical | £189,000 | £74,000 | £14,000 | £372,000 | 11.1% | -£12,900 |
| FIN06 | Internal walls & finishes | £78,000 | £24,000 | £6,000 | £268,000 | 12.9% | £0 |
| EXT07 | External works & drainage | £42,000 | £18,000 | £3,000 | £168,000 | 9.7% | £0 |
| PRE08 | Preliminaries | £132,000 | £98,000 | £5,000 | £336,000 | -5.9% | -£6,600 |
| PLT09 | Plant & temporary works | £64,000 | £32,500 | £2,000 | £143,000 | 8.1% | -£4,200 |
| STF10 | Site staff & supervision | £48,000 | £7,000 | £1,000 | £138,000 | 10.4% | £0 |
| Project | 10 cost codes · sell value £2,566,400 | £1,344,000 | £812,000 | £61,500 | £2,289,000 | 10.8% | -£46,300 |
Contract management
Every term comes back with the clause it came from, the page number and a confidence score, for a human to accept. Nothing is assumed and nothing is decided for you.
| Date | Deadline | Basis | Reminder | Status |
|---|---|---|---|---|
| 21/08/2026 | Application 8 submission Applied to date £1,010,300 across 7 valuations | 7 days before valuation | Sent to 3 people | Due in 6 days |
| 04/09/2026 | Due date | 7 days after valuation | Not required | Scheduled |
| 09/09/2026 | Payment notice check Compare the certified sum against what you applied for | 5 days after due date | Queued | Scheduled |
| 13/09/2026 | Pay less notice deadline | 5 days before final date | Queued | Scheduled |
| 18/09/2026 | Final date for paymentAmended Read from the schedule of amendments, not the standard form. | 14 days after due date Schedule of amendments | Queued | Amdt cl. 4.13.1 |
Coreloops brings cost reporting, contract management and subcontractor orders into one connected platform. No more importing and exporting between tools, or copying and pasting from different spreadsheets.
One loop, per job, every valuation
A report rebuilt by hand each month was out of date the day it was issued. Live position instead, updated as costs land.
POs raised, work instructed, day works run without a sheet. Commitments and accruals sit in the report before the invoice arrives.
The 14 days that became 30. The capped retention that became uncapped. Extracted, shown, applied.
| Ref | Variation | Valuation basis | Value | Cost incurred | Status | Open |
|---|---|---|---|---|---|---|
| VO-012 | Substation slab thickening | Contract rates, cl. 5.6.1 | £18,400 | £17,900 | Approved | — |
| VO-013 | Drainage diversion, block C | Star rate, cl. 5.6.2 | £42,700 | £41,200 | Awaiting approval | 34 days |
| VO-014 | Additional roof lights, 14 no. | Contract rates, cl. 5.6.1 | £26,900 | £25,400 | Awaiting approval | 21 days |
| VO-015 | Ground gas membrane upgrade | Daywork, cl. 5.7 | £31,200 | £33,800 | Instructed, not valued | 28 days |
| VO-016 | Sprinkler tank relocation | Fair valuation, cl. 5.6.3 | £38,600 | £36,100 | Awaiting approval | 12 days |
| VO-017 | Car park lighting revisions | Contract rates, cl. 5.6.1 | £14,900 | £9,600 | Instructed, not valued | 9 days |
| VO-018 | Asbestos removal, plant room | Daywork, cl. 5.7 | £10,000 | £11,700 | Rejected, resubmit | 43 days |
| Unapproved total, 6 variations | £164,300 | £157,800 |
The platform
Committed, actual, accrued, forecast final cost and margin by cost code, updating as costs land.
JCT SBC, DB, IC and MW. NEC4 ECC, options A to F, secondary options X5, X6, X7, X16, W2. Amendments and Z-clauses read and captured, not assumed away.
Every one of the five payment dates, calculated from your contract particulars, not a default. Including the ones your employer amended.
| Payment date | Offset | Source |
|---|---|---|
| Application submission | 7 days before valuation date | cl. 4.9 · p. 29 |
| Due date | 7 days after valuation date | cl. 4.11 · p. 30 |
| Payment notice | 5 days after due date | cl. 4.10.1 · p. 30 |
| Pay less notice | 5 days before final date | cl. 4.10.4 · p. 31 |
| Final date for payment | 14 days after due date | Amdt cl. 4.13.1 |
Assessment dates, X16 retention and X7 delay damages, run against your live cost position.
| Term | Value | Source |
|---|---|---|
| X16 retention | 3% after £250k retention-free | X16.1 · CD1 p. 4 |
| Retention release | ½ at Completion, rest at Defects Cert. | X16.2 · p. 41 |
| Payment | 3 weeks after assessment date | cl. 51.2 · p. 22 |
| Defects date | 52 weeks after Completion | CD1 p. 3 |
| X7 delay damages | £1,250 per day, cap deleted | Z12 · p. 48 |
Coreloops runs the commercial layer above your accounts, not instead of them. Your ledger stays where it is.
Purchase invoices and nominal codes in step with your ledger.
Multi-entity posting for groups running more than one company.
Invoices, credit notes and contacts kept in sync both ways.
Costs coded in Coreloops, posted to your chart of accounts.
Contracts and supporting documents read from where they already sit.
Deadline reminders and application emails from your own mailbox.
Running it in spreadsheets? Bring your current cost report to the demo and we'll rebuild it live.
Book a demoYou don't have a contracts department. Your commercial director reads the contract once, at signing, then works from memory for the next eighteen months. Nobody is checking whether the job is being run the way it was signed.
You're the one handed the amended contract, not writing it. The employer's solicitor drafted the amendments. You accepted them at tender and inherited every one.
When it goes wrong, they have a contracts team and you have a QS with four other jobs on. The record you didn't keep is the case you can't make.
The contract knowledge of a contracts department, without the overhead.
Coreloops isn't document control, and it isn't a spreadsheet replacement for your commercial team. It's the layer between the two: it holds what your contract says, and makes sure every number that follows — applications, retention, variations, cost reports — agrees with it.
We're not lawyers, and this isn't legal advice. Coreloops doesn't interpret your contract, tell you whether a term is fair, or argue your case. It reads what's there, puts it where you can see it, and keeps your numbers consistent with it. What you do about a term is still your call, and your solicitor's.
Bring a real contract to the demo, ideally an amended one. We'll show you the terms you're carrying in about ten minutes.
From a customer
“We had a clear audit trail of every approved CEs with proof attached to it. There was no way for the client to dispute it.”
Samuel Maddison, Director, Project Safe · £100k NEC dispute resolved without escalation