Before discussing the cost of customization, it’s important to understand the difference between PCB and PCBA.
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Many people may wonder why custom PCBs are so expensive. In fact, this is due to a combination of several factors. The production of PCBs requires not only high-precision manufacturing processes but also consideration of the materials used, design complexity, production scale, lead time requirements, and strict testing and quality control. Each of these factors significantly impacts the final cost. Understanding these elements is crucial for accurately estimating and managing PCB costs. Let’s explore the key factors that influence the cost of custom PCBs:
PCB Cost Estimate Breakdown (For Reference Only)
How does material selection affect the PCB cost? PCB Material selection is one of the most important factors influencing the overall cost of a PCB. Different PCB materials offer various performance characteristics, and choosing the right one can significantly affect the final price. Common PCB materials include:
FR-4: The most commonly used material, FR-4 is relatively inexpensive and suitable for most general-purpose circuit boards. FR-4 materials come with different TG (glass transition temperature) values, chosen according to the product's thermal requirements.
As the TG value increases, the cost of the material and the complexity of the manufacturing process also rise, leading to a higher overall PCB price.
TG Value 130℃ -140℃ 150℃ -160℃ 170℃ -180℃ 2 Layer Custom PCB Cost $5.00 $22.14 $26.57 4 Layer Custom PCB Cost $13.00 $45.13 $49.56 6 Layer Custom PCB Cost $93.85 $69.00 $100.60 8 Layer Custom PCB Cost $129.52 129.52 $135.82Impact of TG Value on PCB Cost for 100x100mm, 5pcs
High-Frequency Materials: Such as Rogers materials, used for high-speed communication or RF applications, are more expensive. Rogers materials come in various types to meet different frequency and performance requirements.
The better the material performance, the higher the cost and complexity of the manufacturing process.
Metal-Based Materials: Such as aluminum substrates, commonly used in LED lighting and high-power devices due to their superior heat dissipation. Aluminum substrates come in various grades depending on thermal conductivity.
Impact of Thermal Conductivity on PCB Cost for 100x100mm, 5pcs
These high thermal conductivity materials are more costly and have more complex manufacturing processes, leading to higher overall PCB prices.
PCB Cost Impact: Higher performance materials generally mean higher costs. When selecting materials, it is important to balance electrical performance requirements with the budget.
The more layers a PCB has, the more complex the manufacturing process. The cost difference between single-layer, double-layer, and multi-layer pcb boards is significant.
Impact of PCB Layers on PCB Cost
PCB Cost Impact: Multi-layer boards not only require more materials but also involve more complex manufacturing processes, resulting in significantly higher costs compared to single and double-layer boards.
Larger PCBs require more materials, and the more complex the circuit layout, the higher the production cost. If the design involves fine traces, narrow spacing, or micro-vias, it will increase the difficulty and cost of manufacturing. Similarly, smaller PCBs can also lead to higher costs. For example, if the size is smaller than 10mmx10mm(i.e., either the length or the width is less than 10mm), this can increase the production difficulty, thus raising the cost as well. This is due to the challenges involved in manufacturing small-sized PCBs, which typically require more precise processes and specialized techniques.
PCB Cost Impact: Complex designs require more time, technology, and resources to manufacture, leading to higher overall expenses.
NextPCB supports the production of up to 32 layers of PCB boards
PCB thickness refers to the overall thickness of the circuit board.
PCB Cost Impact: Increasing PCB thickness can enhance mechanical strength and electrical performance but also raises material costs and manufacturing difficulty. Custom thicknesses may require special manufacturing processes, further increasing costs.
The solder mask is a protective layer on the PCB, and solder mask color refers to its hue.
PCB Cost Impact: Solder mask color does not directly affect electrical performance but can impact production costs. Non-standard colors may increase material and processing costs.
Trace width is the width of the conductive paths on the PCB, while spacing is the minimum distance between conductive paths.
Impact of Track Width and Spacing Value on PCB Cost for 100x100mm, 5pcs
PCB Cost Impact: Smaller trace widths and spacings require higher manufacturing precision, potentially increasing production costs. Wider trace and larger spacings reduce manufacturing complexity but may not be suitable for high-density designs.
Copper thickness refers to the thickness of the copper layer on the PCB, usually measured in ounces (oz).
Impact of Copper Thickness Value on PCB Cost for 100x100mm, 5pcs
PCB Cost Impact: Thicker copper layers increase material costs and processing difficulty but support higher current and better heat dissipation, raising overall PCB production costs. For example, 1oz copper thickness is relatively inexpensive, while 2oz or thicker copper layers require more copper material, resulting in higher raw material costs. Therefore, when designing custom PCBs, it is essential to select the copper thickness based on the actual application requirements, ensuring that performance needs are met while effectively controlling costs.
Minimum drill hole diameter is the smallest diameter of holes drilled into the PCB.
Impact of Min. Drill Hole Value on PCB Cost for 100x100mm, 5pcs
PCB Cost Impact: Smaller hole diameters increase production difficulty, thereby raising PCB manufacturing costs.
Vias are used to connect conductive paths between different layers of a PCB (Printed Circuit Board). The via processes include various methods for their fabrication and filling. Below are common via process methods of NextPCB:
Impact of diffrent Via processing on PCB Cost for 100x100mm, 5pcs
PCB Cost Impact: The choice of via process directly affects the production cost of the PCB. When designing a PCB, it is essential to weigh these factors to optimize the balance between performance and cost.
Surface finish choices also affect the PCB cost. Common surface finishes include:
Impact of Surface Finishing on PCB Cost for 100x100mm, 5pcs
PCB Cost Impact: Advanced surface finishes (such as ENIG) are usually more expensive but can improve soldering quality, making them ideal for high-precision, high-reliability boards.
In the PCB industry, certain special processes are used to meet specific design requirements and application needs. These processes also influence the cost of custom PCBs.
Impedance Control
Impedance control is a design technique that ensures the signal transmission lines on a PCB maintain a specific electrical impedance to optimize signal integrity and reduce signal loss. This is especially critical for high-frequency or high-speed signals, such as in RF (radio frequency) and high-speed digital circuits.
PCB Cost Impact: Ensuring signal quality and reducing signal reflection and crosstalk typically increases design and manufacturing costs.
Key information:
Edge Connector Bevel
Edge connector beveling involves creating an angled edge (typically 45°) on the PCB's side, especially around the "gold fingers," to make insertion into connectors easier and faster.
PCB Cost Impact: Beveling improves the ease and speed of connector insertion, reduces friction and wear during the plugging/unplugging process, and extends the connector's lifespan. While beveling introduces an additional manufacturing step, its impact on overall cost is minimal.
Plated Half-holes
Plated half-holes , also called castellated holes, are similar to plated through-holes but occupy only half the vertical space. These compact structures maintain excellent electrical and mechanical connectivity.
PCB Cost Impact: This process adds complexity to production and may increase costs, but it typically improves electrical performance, making it worthwhile in specific applications.
Edge Plating
Edge plating, also known as edge coating, involves plating the sides of a PCB from the top to the bottom surface, with copper coating along at least one peripheral edge. This enhances both electrical connectivity and mechanical strength in the PCB's edge areas, reducing the likelihood of device failure.
PCB Cost Impact: Edge plating improves mechanical strength and electrical stability, particularly in small PCBs and motherboards like those used in Wi-Fi and Bluetooth modules. Although it raises manufacturing costs, it significantly enhances the device's reliability and durability.
Conformal Coating
Conformal Coating is a specialized protective coating used in the PCB industry to safeguard circuit boards and their components from environmental factors. It primarily provides three key protective functions: moisture resistance, dust resistance, and chemical corrosion resistance, which is why it is commonly referred to as "conformal coating."
Main functions of conformal coating:
PCB Cost Impact: Although conformal coating can effectively improve the reliability and service life of PCB, it will also increase the production cost. Therefore, when using conformal coating, it is necessary to make a reasonable choice based on the environmental requirements and cost budget of the specific application.
PCB mass production significantly affects the cost of custom PCB. The per-unit cost is typically higher for small-volume production, as manufacturers need to prepare specialized tools and setup for each run. Large-volume production can spread these fixed costs over more units, lowering the per-unit price. For example, the PCB cost per square inch is as low as $0.02, and the price decreases with higher quantities.
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Impact of Production Volume on PCB Cost
PCB Cost impact: Mass production can reduce per-unit costs, making it an effective way to control expenses in large-scale production.
Fast turnaround times often place additional pressure on manufacturers, increasing costs. If the project requires urgent delivery, opting for expedited services may significantly raise overall expenses.
NextPCB provides 24-hour expedited service
The IPC Class level is a crucial factor in determining the price of custom PCBs. IPC (Institute for Printed Circuits) has established quality standard levels—Class 1, Class 2, and Class 3—that significantly affect the final product's cost. These classifications determine various aspects such as manufacturing processes, material selection, testing standards, and quality control requirements, all of which influence manufacturing costs, production cycles, and product reliability. IPC Class 2 PCBs, typically used for general commercial applications, have a simplified production process and relatively lower costs. In contrast, IPC Class 3 PCBs, designed for applications with extremely high reliability requirements—such as military, aerospace, and medical fields—demand more complex manufacturing processes, stricter material specifications, and more rigorous quality control, resulting in higher prices.
Main Differences between IPC Class 2 and Class 3:
Aspect IPC Class 2 IPC Class 3 Applicable Scope The reliability standard for general electronic products, applicable to commercial and consumer electronics (such as home appliances, office equipment, etc.) High-reliability applications (e.g., aerospace, military, medical devices) Reliability Requirements Medium reliability, suitable for general environmental use Extremely high reliability, suitable for extreme environments and critical applications Defect Tolerance Allows some manufacturing defects as long as they don't affect functionality or long-term use Virtually no tolerance for defects; any flaw could lead to failure Manufacturing Process Control Moderate process control, focusing on major issues and critical aspects Strict process control, with attention to every detail and flawless execution Design and Testing Requirements Moderate design and testing requirements, typically meeting industry standards Very high design and testing requirements, including extreme environmental and reliability tests Environmental Adaptability Suitable for standard environments, without considering extreme conditions like high temperatures Requires design for extreme conditions, including high/low temperatures, humidity, electromagnetic interference, etc. Quality Control Moderate quality control, ensuring stable performance under normal conditions High-level quality control to ensure the product's reliability and safety under any circumstancesImpact of IPC Class Level on PCB Cost for 100x100mm, 5pcs
In addition to the commonly known factors influencing PCB manufacturing costs, several other aspects can affect production expenses. Below are some factors that may influence PCB costs:
a. Working Gerber Files
Working Gerber files are processed or modified Gerber files typically generated during the manufacturing preparation stage. These files have undergone CAM (Computer-Aided Manufacturing) adjustments, potentially including manufacturing compensation, process optimization, and other necessary modifications.
PCB Cost Impact: Since working Gerber files may require additional work from the manufacturer, there can be a slight increase in cost.
Gerber Files Knowledge Overview：Why gerber files are important for manufacturing
Manufacturers typically need the original Gerber files for adjustments and optimization. For example, if your original design has a line width of 6mil, but the file you send to the supplier shows a width of 6.6mil, this modified file is referred to as a "working Gerber" (used for production). Such files have been processed through CAM, potentially including manufacturing compensation, process optimization, and other necessary adjustments. Given that each manufacturer has its own engineering workflow, they may find these changes unclear.
Check Your Gerber Files Online
b. Fabrication and Assembly Reports
Fabrication and assembly reports provide detailed information about the PCB’s manufacturing and assembly, including layer count, material specifications, via sizes, and more.
PCB Cost Impact: The level of detail in fabrication and assembly reports directly affects production accuracy and efficiency. Comprehensive reports can reduce misunderstandings and errors, ensuring a smooth production process and thus lowering costs. A lack of detailed reports may lead to production issues and increased costs.
c. X-out PCB
The "X" on a PCB indicates a "crossed board" (or X-out PCB), which refers to a defective board within a panel. This typically happens due to damage or misalignment during processing, cutting, or other production steps. The "X" marks the board as defective, often due to issues like short circuits, damaged pads, or broken traces.
Why not scrap the entire panel if only one board is defective? Scrapping the whole panel would increase costs. For example, if a panel contains 10 boards and one is defective, discarding the entire panel would be inefficient. Crossed boards are a common issue in panelization, as defects can arise at any stage of production.
As shown in the image, NextPCB's online PCB quote system provides corresponding options, and whether or not crossed boards are accepted will have an impact on the PCB price. Learn more about: Should I Accept Crossed Boards?
d. UL Mark (UL Certification)
The UL mark indicates that the PCB complies with UL’s safety standards. Additionally, UL certification facilitates product traceability, making it easier to identify the source of production and resolve any issues that arise.
PCB Cost Impact: Obtaining UL certification typically involves additional testing and validation, which can increase production costs. Fortunately, NextPCB offers a free UL certification option, which can be selected during the online PCB pricing process without adding extra costs.
Buyers and engineers, especially those who are just getting involved in this industry, will ask questions after receiving the PCB assembly quotation: What are the costs of PCB manufacturing and assembly services?
What factors affect its price? And how to reduce PCB assembly costs?
If you need a PCB manufacturer to manufacture a bare PCB board for your PBCA, then the PCB board will be the first part of the cost. The cost of a PCB board is determined by the material and the difficulty of making it.
Under normal circumstances, PCB assemblers will purchase components for customers, and some customers will also nominate parts suppliers, so PCBA suppliers only need to follow the BOM to obtain the correct components, which is another important part of the assembly cost.
For small batch orders, the factory will charge engineering costs or setup costs. Generally, these costs are included in PCB assembly costs and SMT costs.
Templates are necessary for PCB assembly, whether you use framed templates or frameless templates. Therefore, when we calculate the cost, we should also consider the template cost. Generally, the cost of framed templates is much higher than that of frameless templates, but in most cases, we use framed templates, and frameless templates are only used for prototyping.
Unlike surface mount technology (SMT), DIP welding requires more labor because it is a manual welding process, so labor cost is another aspect included in PCB assembly.
Some customers need to perform additional tests on the function and programming of the PCBA, which is another aspect that needs to be included in the PCB assembly cost.
The cost of printed circuit boards is determined by the materials used. Commonly used materials include FR4, polyimide, polytetrafluoroethylene, and metals. Generally speaking, the cost of FR4 is lower than that of metal materials. But please remember that PCB material selection cannot only be regarded as cost. More importantly, we should pay attention to the performance of each material to ensure that the materials used can meet your product requirements.
The number of layers is a very critical factor affecting the cost of PCB assembly. The more PCB layers you need to assemble, the more money you spend. For example, multi-layer PCBA is more expensive than single-layer PCBA. But the number of layers of PCBA should depend on your exact requirements. For some complex devices, multi-layer PCBA is necessary to ensure that the device can perform as expected.
The technology used to assemble components will also affect the cost of PCB assembly. Generally speaking, the cost of surface mount technology (SMT) is lower than that of through-hole technology (THT), because the SMT process is automated and more efficient, while THT requires more time to punch holes on the circuit board. In addition, some PCBs may also need to be assembled using ball grid arrays or BGA, which will increase assembly costs. So before we start assembling, we need to figure out your project requirements and choose the correct assembly technology. Don't ignore the performance of the components just because you want to reduce the assembly cost, because it may cause the PCB or even the entire equipment to fail.
Labor costs will affect PCB assembly costs to a large extent, and labor costs vary from region to region. For example, the labor costs in the United States and Europe are much higher than in South Asia, and you can save about 50% of the assembly labor costs when obtaining assembly services in countries with cheap labor. But when you choose labor from different countries, you should also pay attention to their expertise in PCB assembly, especially for some complex PCB assembly projects, such as multi-layer PCBA.
The number of PCBA orders will significantly affect the assembly cost. PCB assemblers will provide preferential prices for large orders, while for small quantities, the cost of each PCBA may be higher, especially when the quantity cannot reach the minimum order quantity, and then set up costs, engineering costs, and other one-time costs are required, which will definitely increase assembly costs. However, for some large-volume orders, you may need to bear expensive shipping costs, which is another factor you need to consider when making a project budget.
The more customization you need, the higher the cost, so it is important to pay close attention to the customized specifications. Customization such as the number of layers, trace size, and coating on the PCB will increase the cost of PCB assembly. In some cases, PCBA needs to achieve specific properties, such as water resistance, and assembly costs will be higher, because assemblers need to customize from bare boards to electronic components, which is indeed a time-consuming process.
The expected delivery time of your order will also affect your assembly cost, and expedited orders will increase PCB assembly costs. On the one hand, assemblers need to suspend some existing orders and focus productivity on your orders. They may even require workers to work overtime to catch up with your schedule, and overtime pay will definitely increase costs. On the other hand, regular transportation will waste a lot of time, so you must choose expedited transportation to ensure that you can receive your PCBA on time, but expedited transportation will bring higher costs.
Packaging cost is another factor that affects PCB assembly cost, and different electronic component packaging will lead to different assembly costs. Some components may require more manpower to complete the packaging. Taking BGA as an example, it takes more time and effort to complete the packaging because they must be connected to a power supply. Unlike other components, the electrical pins of the BGA must be X-rayed to check for problems such as short circuits, which will greatly increase assembly costs.
There are a variety of factors that affect PCB cost, including surface finish, printed circuit board size, number of layers, and Via technology. The rational design of these parts helps to reduce costs while maintaining quality. For example, the more vias on the board, the more expensive they will cost, and the smaller the vias, the higher the cost. Therefore, it is important for designers to carefully arrange the number and size of vias. In addition, boards of different shapes will also affect the price. Generally, the cost of shapes such as squares and rectangles is lower than that of other special shapes. Therefore, when designing PCBs, if it is not necessary to make special-shaped boards, try to use regular shapes.
It is very important to create a bill of materials (brilliantly) to include raw materials, components, and sub-components required for PCB manufacturing and assembly. A valid BOM should contain the necessary data, such as part number, manufacturer name, reference indicator, description, quantity, package, footprint, and note that placing an order in large quantities can save a lot of assembly costs. Generally, PCB assemblers will provide BOM templates, you only need to fill in according to your PCBA requirements. We recommend adding component replacements to the BOM. With the rapid development of the electronics industry, newly upgraded components will replace the old ones. It will take a long time to find alternatives in the market. If you can provide complete BOM and component replacement information, PCB assemblers can deliver PCBA without delay and reduce costs.
Cooperating with a reliable PCB assembler can also save your assembly costs. A good assembler can help you reduce costs while ensuring assembly quality. But choosing the right assembler is not easy. The following are some key considerations on how to choose a reliable PCB assembler:
First of all, you should check their certification to ensure that the manufacturing capabilities and management practices of the PCB assembly machine can meet high standards. They should at least obtain certifications like ISO, RoHS directive, IPC, and UL.
Second, you should know what kind of equipment they use. Advanced equipment can improve assembly efficiency and ensure high quality assembly. For example, advanced SMT equipment ensures that components can be assembled with high precision.
Finally, you should check whether the relationship between the assembler and the supplier is good. A stable supplier network ensures that you can get preferential prices, and more importantly, it can ensure a stable supply of raw materials or electronic components and avoid delivery delays.
According to economies of scale, the more PCBA you place, the lower the price you can get. Therefore, before placing an order, it is best to make a scientific estimate of the project demand and understand its order volume. If the demand is large, it is best to place an order at once instead of in batches. As for the delivery date, please make sure that you have negotiated the specific date with the assembler. And let the supplier start the assembly as soon as possible. In addition, the assembly time will be in a hurry and additional costs will be incurred.
As we all know, PCB assembly workers in Western Europe and the United States are skilled, but the cost will be very high. Therefore, working with assemblers in low-income areas is another way to reduce costs. But we should note that reducing assembly costs is not our ultimate goal. It is true that countries such as Vietnam or India have lower labor costs, but they lack skilled labor and cannot guarantee the quality of PCBA. Instead, we recommend that you cooperate with PCB assemblers in China, where labor costs are not high, and they have enough skilled labor.
Cooperate with BangYan to reduce PCB assembly costs
BangYan provides a scientific quotation after considering various factors that affect the cost of PCB assembly. Our experts are very familiar with the various raw materials and electronic components required for PCB assembly, and can provide the best assembly solution within your budget. In addition, we involve customers early in the process in order to process decisions that help reduce costs in advance. We have a strong and stable supplier network around the world, which means that we can always obtain high-quality raw materials at competitive prices.
In addition to the lower PCB assembly cost, we also pay great attention to the quality of PCBA. At BangYan, we have a strict quality control system, we have passed ISO certification, RoHS directive, IPC, and UL, and we also have functional testing, X-ray testing, vision testing, and AOI inspection to ensure that every piece of PCBA we deliver to our customers is of high quality. Working with us can not only reduce your PCB assembly costs, but also save you from worrying about quality issues.
If you want to learn more, please visit our website PCBA Copy Service.