Short answer: compare the billing against the cost weight of the stages actually finished — never against how far along the house looks, and never against how many months have passed. Those two instincts are exactly what an inflated billing relies on. When the roof is on and the walls are up, most owners feel the house is 80% done. It is about 55% of the money.
A bad quote costs you a premium. Overpaying against progress costs you leverage. Once the money released exceeds the work in place, the only thing keeping the contractor on site is goodwill — you have already paid for work you do not have, and the remaining budget no longer covers the remaining scope. Every abandoned house in the Philippines has this same arithmetic behind it.
Construction looks finished long before it is paid for. The frame and the roof are dramatic and fast; the finishing trades are slow, fiddly and expensive. That mismatch is the whole problem.
The weights below are derived from our own 2026 house construction cost breakdown. Overhead and contingency, about 11% of that breakdown, is spread across the whole job rather than earned at any one stage, so it is excluded here and the remaining trades are rescaled to 100%.
| # | Stage | Share of contract | Cumulative | What it looks like |
|---|---|---|---|---|
| 1 | Site works & foundation | 13.5% | 13.5% | A hole and some concrete. Feels like nothing |
| 2 | Superstructure — columns, beams, slab | 18.0% | 31.5% | The single biggest stage |
| 3 | Masonry walls & plastering | 13.5% | 45.0% | Suddenly it looks like a house |
| 4 | Roofing system | 10.1% | 55.1% | Feels ~80% done. It is 55% |
| 5 | Electrical rough-in | 4.5% | 59.6% | Invisible. Conduits in walls and slab |
| 6 | Plumbing rough-in | 3.9% | 63.5% | Also invisible, also essential |
| 7 | Doors, windows & ceiling | 11.2% | 74.7% | Enclosure complete |
| 8 | Tiles & finishes | 14.6% | 89.3% | Slow, expensive, and where jobs stall |
| 9 | Painting | 4.5% | 93.8% | Looks finished, is not |
| 10 | Electrical fixtures & devices | 3.4% | 97.2% | Outlets, switches, lights |
| 11 | Plumbing fixtures | 2.8% | 100.0% | The last 3% takes forever |
Two rows deserve attention. Row 4 is where owners overpay, because the house has never looked more finished relative to how much has been spent. Row 8 is where jobs die — tiles and finishes are almost 15% of the contract, and by then a contractor who has been paid ahead has very little reason to keep going.
Mark off what is genuinely finished on site. It works out your weighted accomplishment, applies retention and advance recoupment the way the procurement rules do, and tells you whether the money you have released is ahead of the work.
Philippine government infrastructure contracts run on a codified set of rules. Private house contracts do not — but the government rules are the only written benchmark in the country, and a fair private contract usually mirrors them. The implementing rules of RA 12009 require five deductions from the certified gross amount of every progress payment:
Delivered Is Not Installed
The IRR of RA 12009 says it plainly: except as otherwise stipulated, materials and equipment delivered on the site but not completely put in place shall not be included for payment.
This is the most common way a progress billing gets quietly inflated. A pallet of tiles in the yard is inventory, not accomplishment — it can still be removed, damaged, or used on somebody else's project. If your contract does allow payment against delivered materials, insist on three things: the material tagged and stored on your site, insured, and with title transferred to you on payment. Without all three you are financing someone else's working capital.
Retention is the only real leverage an owner keeps at the end of a job, when the punch list is long and the contractor's attention has moved to the next project. The rule under the IRR of RA 12009 is specific, and worth quoting because it is routinely misdescribed:
Progress payments are subject to retention of ten percent (10%), based on the total amount due before any deduction, retained from every progress payment until fifty percent (50%) of the value of works is completed. After that point, if the work is satisfactory and on schedule, no additional retention is made. If it is not, the 10% continues, though it may be reduced to 5% for justifiable cause. The total is released on final acceptance of the works.
So on a well-run job, retention tops out at about 5% of the contract sum — 10% of the first half — and sits there until handover. That is a meaningful amount of money and it is the reason contractors come back to fix things.
Government infrastructure caps advance payment at 15% of the contract price, and only against an irrevocable standby letter of credit, bank guarantee or callable-on-demand surety bond. Private residential practice in the Philippines routinely runs 20–30%, with no security at all. That gap is where most homeowner losses live. If you are paying more than 15% up front, you are extending unsecured credit — so at minimum, tie it to a written mobilisation and materials schedule with dates.
In government contracts, liquidated damages run at at least one-tenth of one percent (0.1%) of the cost of the unperformed portion, per day of delay, and when accumulated damages reach 10% of the contract price the owner may rescind the contract outright.
Private contracts only have a liquidated damages clause if somebody wrote one in. Most homeowner contracts do not, which is why a completion date in a typical residential contract is a hope rather than an obligation. A date with no consequence attached is not a deadline.
That last point is the whole game. In a government contract the procuring entity's project engineer checks the statement of work accomplished and certifies the amount payable. On a private house, most owners have nobody in that role — so the contractor measures their own work, certifies their own accomplishment, and bills against it.
Stage weights are derived from our 2026 house construction cost breakdown, rescaled to exclude overhead and contingency, and are planning figures — your contract's own bill of quantities governs. Retention, advance payment, deduction and liquidated damages provisions are quoted from the Implementing Rules and Regulations of Republic Act 12009, 1st Edition, which apply to government procurement. Private construction contracts in the Philippines are governed by the Civil Code and by whatever the parties agree; the rules above are used here as the country's standard benchmark, not as law binding your builder. For a contract of any size, have it reviewed before signing.
How do I know if my contractor's progress billing is fair?
Compare the billed percentage against the cost weight of the stages actually finished, not against how far along the job looks or how many months have passed. Each stage of a house carries a different share of the contract: the structural frame is roughly 18 percent of the cost, masonry and plastering about 13 percent, roofing about 10 percent, and tiles and finishes about 15 percent. A house with the roof on and the walls up looks nearly finished to most owners but is only about 55 percent of the money. If the billing is well ahead of the weighted accomplishment, ask which specific line items justify the difference before releasing anything.
What is retention money in construction?
Retention money is a percentage held back from every progress payment as security that defects will be corrected. Under the implementing rules of Republic Act 12009, the New Government Procurement Act, progress payments on government infrastructure are subject to retention of ten percent, based on the total amount due before any other deduction, retained from every progress payment until fifty percent of the value of works is completed. After that point, if the work is satisfactory and on schedule, no additional retention is made. The total retention is due for release upon final acceptance of the works. Private construction contracts are not bound by that rule, but it is the standard Philippine benchmark and a fair private contract usually mirrors it.
Should materials delivered to site be included in a progress billing?
Under the government procurement rules the answer is no. The implementing rules of RA 12009 state plainly that, except as otherwise stipulated in the bidding documents, materials and equipment delivered on the site but not completely put in place shall not be included for payment. This matters because delivered-but-uninstalled material is one of the most common ways a progress billing gets inflated: a pile of tiles or steel in the yard is not accomplishment, it is inventory, and it can still be removed, damaged or used on another project. If your contract allows payment for delivered materials, insist on offsite storage insurance, clear tagging and transfer of title.
How much downpayment should I give a contractor in the Philippines?
For government infrastructure, the implementing rules of RA 12009 cap advance payment at fifteen percent of the total contract price, and even then only on the contractor's written request and against an irrevocable standby letter of credit, bank guarantee or callable-on-demand surety bond. Private residential practice in the Philippines commonly runs higher, often twenty to thirty percent, usually with no security at all behind it. That gap is the single largest source of loss for homeowners when a contractor abandons a job. If you are paying more than fifteen percent up front, treat the excess as unsecured credit you are extending, and tie it to a specific mobilisation and materials schedule.
What can be deducted from a progress payment?
The implementing rules of RA 12009 list five deductions from the certified gross amount of a progress payment: the cumulative value of work previously certified and paid for, the portion of the advance payment being recouped, retention money in accordance with the contract, any amount to cover third-party liabilities, and any amount to cover uncorrected discovered defects in the works. That last one is the item most often forgotten by owners. If there is defective work that has been identified and not yet corrected, its cost is a legitimate deduction from the next payment, not a separate argument to be had later.
What happens if a contractor is late in the Philippines?
In government infrastructure contracts, liquidated damages are set at at least one-tenth of one percent of the cost of the unperformed portion of the works for every day of delay, and once accumulated liquidated damages reach ten percent of the total contract price the procuring entity may rescind or terminate the contract. Private contracts must state their own liquidated damages clause to have one, which is why so many homeowner contracts have no practical remedy for delay at all. A contract with a completion date but no damages for missing it gives you a date and nothing else.
The single change that prevents overpayment is separating the person who measures the work from the person who invoices it. That is what project oversight is.