KS-2 KS-3 Online 2026: how to fill construction completion acts without an estimator
Closing a construction phase, no in-house estimator — filling KS-2 manually in Excel, mixing up units, forgetting VAT in KS-3. The client returns documents for revision, payment is delayed, the relationship sours. Errors in KS-2/KS-3 lead to VAT deduction refusals and financial disputes. In 2026, an AI system generates a linked KS-2 + KS-3 pair in 10 minutes from a work description, automatically matching GESN rates.
Key facts
- Manual filling of one KS-2 + KS-3 pair takes 1.5-3 hours for an experienced estimator
- Errors in KS-2/KS-3 lead to VAT deduction refusals and payment delays
- KS-2 and KS-3 are valid only as a pair — one without the other has no legal force
- AI generates correctly linked documents with GESN rates in 10 minutes
What we checked for this article: whether "KS-2 KS-3 Online 2026: how to fill construction completion acts without an esti…" answers a real buyer question with practical constraints, risks, and next steps.
Which KS-2 and KS-3 Filling Method to Choose?
The best option eliminates errors and requires no knowledge of rate codes. AI tools solve this without training.
| Method | Pros | Cons | Price |
|---|---|---|---|
| Excel / Word template | Free, familiar format | No auto rate matching, easy formula and VAT errors, no KS-2 to KS-3 link | Free |
| Online services (service-online.su, rftk.ru) | Step-by-step field filling | Must enter each item manually, no GESN database, no labor cost calculation | Free |
| Estimating software (Grand Smeta, 1C:BIT.Construction) | Full rate database, auto formulas | Expensive, complex interface, requires training, tied to PC | from $500/year |
| TimeMaterial AI | Fill by work description, auto GESN matching, linked KS-2 + KS-3, Excel export | Currently only GESN-2020 | $50/mo |
How to fill KS-2 and KS-3 in 3 steps?
Step 1. Send work list to Telegram bot
Open @timematerial_bot and send: - Text description of completed work - Excel file with item list - Screenshot of the work log (KS-6a form)
Format does not matter — AI automatically detects descriptions, volumes and units of measurement.
Step 2. AI matches GESN rates and calculates cost
For each item, the bot: 1. Finds the matching rate from GESN-2020 database 2. Recalculates units of measurement for your volume 3. Calculates work cost (without VAT) and total amount
You confirm or adjust each item in the dialog.
Step 3. Get ready KS-2 and KS-3 in Excel
The system generates: - KS-2 act with filled header, work table and totals - KS-3 certificate with cost calculation, VAT and total payable amount - Both documents are linked — KS-3 data is automatically pulled from KS-2
Download ready files in .xlsx format, print and sign.
See also
- GESN Rates 2026: how to find in 3 seconds
- Excel to Construction Estimate Converter 2026
- Construction Estimate Automation with AI 2026
- Time and Material Pricing Calculator 2026
Frequently Asked Questions
Is it mandatory to use the standard KS-2 and KS-3 forms?
For government contracts and budget construction — yes. In other cases, since 2013 modified forms are allowed, but with mandatory primary document requisites (Federal Law 402-FZ).
Can KS-2 and KS-3 be filled without an estimator?
Yes. TimeMaterial matches GESN rates automatically by work description. You do not need to know rate codes — just describe the work in plain words.
How are KS-2 and KS-3 forms related?
KS-2 contains the list and cost of completed work. Based on it, KS-3 is generated — an invoice-certificate for payment including VAT. The system automatically transfers data from KS-2 to KS-3.
Does the system account for VAT?
Yes. In KS-2, cost is stated without VAT (as required by the form), and in KS-3 a VAT line and total payable amount are automatically added.
Automation cost — $300 per project. Write on Telegram: @onoutnoxon — we will review your estimating task.
Learn more about features — on TimeMaterial — AI Estimate Automation page.
Article prepared by TimeMaterial team. Updated: 2026-03-05.
Sources: - https://www.consultant.ru/document/cons_doc_LAW_26303/dcaa7085e4a308d45f6b131e6506737ef9230c7c/ - https://www.gazeta-unp.ru/articles/14951-ks-2-i-ks3-formy-obraztsy-zapolneniya-2023 - https://gectaro.com/blog/tpost/v9gb81rtf1-chto-takoe-akt-ks-2-i-spravka-ks-3-v-str - https://service-online.su/forms/buh/ks-2/ - https://newprospect.ru/news/articles/zapolnenie-unificirovannyh-form-ks-2-i-ks-3/ - https://www.buhgalteria.ru/article/formy-ks-2-i-ks-3-kak-zapolnit-i-otrazit-v-bukhgalterskom-uchete
About the service "KS-2 KS-3 Online 2026: how to fill construction completion acts without an estimator"
Fill KS-2 and KS-3 forms online in 10 minutes instead of 2 hours. AI auto-fills GESN rates, calculates volumes, generates the act and certificate. 50 USDT/month.