FWD (Falling Weight Deflectometer) testing in India typically costs Rs. 600 to Rs. 1,200 per test point, with most NHAI and state PWD projects landing in the Rs. 750 to Rs. 950 band. Final pricing depends on test-point spacing (250 m / 500 m / 1 km), back-calculation deliverable (deflection summary only vs full layer-moduli with overlay-design recommendation), terrain, traffic management requirement, and report format. Network-level surveys above 100 km commonly achieve lower per-point rates through volume; project-level overlay-design surveys with full IRC 115 deliverables sit at the upper end.
Headline FWD Cost Range in India (2026)
| Project Tier | Per-Point Range (₹) | Typical Scope |
|---|---|---|
| Network-level (100+ km, 500-1000 m spacing) | ₹600 – ₹800 | Deflection-basin capture, summary report, no back-calculation |
| Standard NHAI / state PWD project (250-500 m spacing) | ₹750 – ₹950 | Deflection basin, back-calculated subgrade modulus, IRC 115 overlay recommendation |
| Project-level for IRC 115 overlay design (250 m spacing) | ₹900 – ₹1,200 | Full back-calculation, all-layer moduli, overlay-thickness design output, DPR-quality report |
| Forensic / dense investigation (50-100 m spacing) | ₹1,000 – ₹1,500 | High point density on failure-prone sections; combined with cores and laboratory testing |
These bands include FWD field execution, basic data processing, and a deflection-summary report. Full IRC 115 back-calculation with overlay-thickness design output, GIS overlays, and a NABL-accredited DPR-quality report sits at the upper end of each band.
Test-Point Density and Total Project Cost
Per-test-point pricing translates to project-level cost based on test-point density:
| Spacing | Test Points per km | Per-km Cost @ ₹850/point |
|---|---|---|
| 1,000 m | 1 point/km × 2 lanes = 2 | ₹1,700/km |
| 500 m | 2 points/km × 2 lanes = 4 | ₹3,400/km |
| 250 m | 4 points/km × 2 lanes = 8 | ₹6,800/km |
| 100 m | 10 points/km × 2 lanes = 20 | ₹17,000/km |
For an outer-wheel-path single-direction FWD survey on a 50 km project corridor at 250 m spacing, the field cost would be: 50 km × 4 points/km × ₹850 = Rs. 1,70,000. Adding mobilisation (Rs. 50,000-1,00,000), back-calculation processing, IRC 115 overlay-design report, and 18% GST brings the total to approximately Rs. 3,00,000-3,50,000 for a complete IRC 115 deliverable.
Six Scope Variables That Move the FWD Price
1. Back-calculation depth
Surface deflection summary alone (no back-calculation) is the cheapest deliverable. Back-calculation of subgrade modulus only adds Rs. 50-100 per point. Full multi-layer back-calculation using software like ELMOD or BAKFAA (typically yielding subgrade, sub-base, base and bituminous-layer moduli) plus overlay-thickness design under IRC 115 adds Rs. 200-400 per point in processing and engineering effort.
2. Load level — single-load vs multi-load drop sequence
Standard FWD testing uses a 40 kN impulse load (simulating a heavy commercial vehicle wheel). Multi-load testing (typically 30, 40, 50, 65 kN drop sequence at each point) provides non-linearity indicators useful for forensic investigation but doubles test time per point and adds 30-40% to per-point cost.
3. Temperature correction and hour-of-day
Bituminous pavement modulus is highly temperature-sensitive. IRC 115 requires deflection normalisation to a standard pavement temperature (typically 35°C). Pavement-temperature probes (NSV-mounted infrared, or hand-held) are required for accurate normalisation. Some low-cost quotes skip temperature measurement, producing reports that fail IRC 115 acceptance review.
4. Traffic management
FWD testing requires the test trailer to stop at each test point for 60-90 seconds. On busy corridors, single-lane closure with traffic marshalling is essential — typically Rs. 10,000-30,000 per day depending on lane count and traffic volume. Night-window testing reduces traffic-mgmt cost but reduces daily productivity by 30-50%.
5. Deliverable format
Basic deliverable is a tabular CSV of per-point deflection-basin values. Standard NHAI deliverable adds a chainage-wise PDF report with statistical summary and section-wise subgrade-modulus map. Full IRC 115 DPR deliverable adds back-calculated layer moduli, structural-number computation, overlay-design output, GIS shapefile, and remaining-life estimation — adding 15-25% to total cost.
6. NABL accreditation
NABL-accredited FWD reports under ISO/IEC 17025:2017 (e.g. NKMPV TC-14144) are accepted by NHAI, state PWDs, and World Bank-funded overlay-design programmes without additional verification. Non-accredited surveys are cheaper at quote stage but typically trigger re-survey demands during DPR review — eliminating the apparent saving.
What an FWD Quote Should Include
- Mobilisation and demobilisation (lump sum, terrain/distance dependent)
- Field testing at agreed per-point or daily rate
- Equipment standby (per day) for client-induced delays
- Pavement-temperature measurement at each test point (included)
- Data processing — deflection-basin export, statistical summary (per point)
- Back-calculation — single-layer or multi-layer (separate line item)
- Overlay-design output per IRC 115 (lump sum or per km, optional)
- GIS deliverable preparation (per point or per km, optional)
- Sample report and raw data files (included)
- Traffic management coordination (per day, optional)
- Taxes (GST as applicable)
FWD vs Benkelman Beam — Cost Comparison
Benkelman Beam testing under IRC 81 is the legacy alternative to FWD and is materially cheaper at the per-point level (Rs. 150-400 per point vs Rs. 600-1,200 for FWD). However, Benkelman provides only a single rebound deflection — not a full deflection basin — so layer-moduli back-calculation is not possible. For overlay design under IRC 115 (the current best-practice standard for major NH and SH projects), FWD is required. Benkelman remains acceptable under IRC 81 for smaller projects, PMGSY rural roads, and budget-constrained engagements.
See FWD vs Benkelman Beam — Pavement Evaluation Methods Compared for the technical and acceptance comparison, and NSV vs FWD vs Benkelman Beam for the three-way comparison including surface-condition methods.
Combined NSV + FWD Pricing
Mobilising NSV (surface condition) and FWD (structural capacity) together typically saves 15-20% on combined cost compared to separate engagements. For a 100 km IRC 115 overlay-design DPR, combined NSV + FWD with full deliverables typically costs Rs. 8-12 lakh, vs Rs. 10-15 lakh if commissioned separately.
Related Reading
- FWD vs Benkelman Beam — Pavement Evaluation Methods Compared
- NSV vs FWD vs Benkelman Beam — Three-Way Comparison
- IRC 115 Overlay Design via FWD Back-Calculation — Step-by-Step Guide
- FWD Testing Service — engagement details and quotes
Need a project-specific FWD survey quote with IRC 115 overlay-design output? NKMPV is NABL-accredited (TC-14144 under ISO/IEC 17025:2017) for FWD pavement testing across India. Visit the FWD Testing service page or call +91-82953-60108 with your project corridor length and overlay-design scope for a fixed-price quote within 48 hours.