Kidney transplantation is one of the safest major organ surgeries performed today. In 2023, 99% of people who received a kidney from a living donor survived the first year, and 97% of those who received a kidney from a deceased donor did the same. No surgery is without risk, but for most people with kidney failure, a transplant offers significantly better long-term survival than staying on dialysis.
That said, “safe” means different things depending on what you’re worried about. The surgery itself carries one set of risks. The lifelong medications you take afterward carry another. And if someone you love is considering donating a kidney, their safety matters too. Here’s what the numbers actually show.
Survival Rates for Recipients
Short-term survival after kidney transplant is excellent. One-year graft survival (meaning the transplanted kidney is still working) sits at about 98% for living donor kidneys and 94% for deceased donor kidneys. Patient survival is even higher because if a transplant fails early, the recipient can return to dialysis.
Over longer time frames, the picture is still favorable but more nuanced. Five-year patient survival is roughly 92% for living donor recipients and 83% for deceased donor recipients. These numbers dipped slightly during the late 2010s compared to earlier in the decade, a trend researchers are still studying. A transplanted kidney from a living donor now lasts a median of about 19 years, up from 12 years for transplants done in the late 1990s. Deceased donor kidneys last a median of nearly 12 years, up from about 8 years over the same period. Improvements in surgical technique, organ matching, and medication management have driven those gains.
Compared to dialysis, transplantation consistently shows lower long-term mortality, and the survival advantage grows the longer a person lives with a functioning transplant. For someone healthy enough to undergo the procedure, a transplant is not just safe but the better option for a longer life.
Risks of the Surgery Itself
The transplant operation typically takes two to four hours. Your own kidneys usually stay in place, and the new kidney is placed in your lower abdomen, connected to nearby blood vessels and your bladder. Recovery in the hospital generally lasts about a week.
Vascular complications, primarily problems with the artery or vein supplying the new kidney, affect roughly 10% of recipients. Renal artery narrowing and blood clots account for the majority of these. Most vascular problems are treatable, but in rare cases they can threaten the transplanted organ. Other surgical complications include bleeding, infection at the incision site, and urine leaks where the new kidney connects to the bladder. These are typically manageable and caught early during your hospital stay.
Lifelong Medications and Their Side Effects
After transplant, you take immune-suppressing medications for the rest of the kidney’s life. These drugs prevent your immune system from attacking the new organ, but they come with trade-offs because a dampened immune system is less effective at fighting infections and monitoring for abnormal cell growth.
The most common medication-related issue is high blood pressure, which develops at a rate of about 152 cases per 1,000 patient-years among kidney recipients. In practical terms, a substantial number of transplant patients will need blood pressure medication at some point. New-onset diabetes occurs at a rate of about 69 per 1,000 patient-years. Both conditions are manageable but require ongoing monitoring and sometimes additional medication.
These complications tend to appear early. High blood pressure, diabetes, and abnormal cholesterol levels most frequently show up within the first month of starting immunosuppressive therapy. Knowing this, transplant teams monitor you closely during those initial weeks and adjust medications as needed.
Infection Risk After Transplant
With a suppressed immune system, you’re more vulnerable to infections that healthy immune systems handle easily. One of the most closely watched is cytomegalovirus (CMV), a common virus that most people carry without symptoms. After transplant, it can reactivate or be transmitted through the donor organ. The risk is highest when the donor carries the virus but the recipient does not, in which case CMV disease develops in 15% to 20% of cases. When the recipient already carries the virus, the rate drops to 5% to 10%.
Transplant teams use preventive antiviral medications and regular blood testing during the first year to catch viral reactivation early. The risk of serious infection is highest in the first six months, when immunosuppression is at its strongest. Over time, doses are typically reduced to the lowest effective level, which helps restore some immune function.
How Safe Is It for Living Donors?
If you’re considering donating a kidney, the safety data is reassuring. In-hospital mortality for living donors is 0.007%, or roughly 1 in 14,000. About 17% of donors experience a perioperative complication, but most are minor: gastrointestinal issues (4.4%), bleeding (3%), respiratory problems (2.5%), and other surgical or anesthesia-related issues (2.4%). Only about 2.4% of donors require intensive care.
Before you’re approved to donate, you go through extensive screening. International guidelines require a kidney filtration rate of at least 60 mL/min (a measure of how well your kidneys work), with rates above 90 considered clearly acceptable. Candidates below 60 are not eligible. Blood pressure must be normal or well-controlled with no more than two medications and no signs of organ damage from hypertension. If your BMI is over 30, the transplant team evaluates your individual risk profile before deciding. These thresholds exist specifically to ensure donation doesn’t put you at meaningful long-term health risk.
What Affects Your Individual Risk
Not everyone faces the same level of risk from a kidney transplant. Several factors shift the odds:
- Living vs. deceased donor: Living donor kidneys perform better at every time point, with higher graft survival rates and longer median kidney life.
- First vs. repeat transplant: A first transplant has better five-year graft survival (about 77%) compared to a subsequent one (about 72%).
- Age and overall health: Younger, healthier recipients generally have better outcomes. Conditions like diabetes and heart disease increase surgical and post-transplant risks.
- Donor-recipient matching: Better tissue matching reduces the intensity of immunosuppression needed and lowers rejection risk.
Your transplant team evaluates all of these factors before listing you as a candidate. The goal isn’t just to determine whether transplant is safe for you, but whether it offers a clear benefit over your current treatment. For the vast majority of people with end-stage kidney disease, it does.